diff --git a/assets/src/modules/Announcement.js b/assets/src/modules/Announcement.js
new file mode 100644
index 0000000000..546032f047
--- /dev/null
+++ b/assets/src/modules/Announcement.js
@@ -0,0 +1,149 @@
+/**
+ * @module modules/Announcement.js
+ * @name Announcement
+ * @copyright 2026 3Liz
+ * @license MPL-2.0
+ */
+
+/**
+ * Fetches pending announcements from the server and displays them
+ * sequentially in the #lizmap-modal Bootstrap 5 modal.
+ */
+export default class Announcement {
+
+    init() {
+        const announcementUrl = globalThis['lizUrls']?.announcement;
+        if (!announcementUrl) {
+            return;
+        }
+
+        const params = globalThis['lizUrls'].params || {};
+
+        const url = new URL(announcementUrl, window.location.origin);
+        if (params.repository) {
+            url.searchParams.set('repository', params.repository);
+        }
+        if (params.project) {
+            url.searchParams.set('project', params.project);
+        }
+
+        fetch(url.toString())
+            .then(response => response.json())
+            .then(data => {
+                if (data.announcements && data.announcements.length > 0) {
+                    this._showAnnouncements(data.announcements);
+                }
+            })
+            .catch(err => {
+                console.warn('Failed to fetch announcements:', err);
+            });
+    }
+
+    /**
+     * Show announcements one at a time.
+     * @param {Array} announcements
+     * @param {number} index
+     */
+    _showAnnouncements(announcements, index = 0) {
+        if (index >= announcements.length) {
+            return;
+        }
+
+        const announcement = announcements[index];
+        this._showModal(announcement, () => {
+            this._markSeen(announcement.id);
+            // Show next announcement after a short delay
+            if (index + 1 < announcements.length) {
+                setTimeout(() => {
+                    this._showAnnouncements(announcements, index + 1);
+                }, 500);
+            }
+        });
+    }
+
+    /**
+     * Display a single announcement in the #lizmap-modal.
+     * @param {Object} announcement
+     * @param {Function} onClose
+     */
+    _showModal(announcement, onClose) {
+        const modalEl = document.getElementById('lizmap-modal');
+        if (!modalEl) {
+            return;
+        }
+
+        modalEl.innerHTML = `
+            <div class="modal-dialog">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <h5 class="modal-title">${this._escapeHtml(announcement.title)}</h5>
+                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+                    </div>
+                    <div class="modal-body">
+                        ${announcement.content}
+                    </div>
+                    <div class="modal-footer">
+                        <button type="button" class="btn btn-primary" data-bs-dismiss="modal">OK</button>
+                    </div>
+                </div>
+            </div>
+        `;
+
+        const handleHidden = () => {
+            modalEl.removeEventListener('hidden.bs.modal', handleHidden);
+            if (onClose) {
+                onClose();
+            }
+        };
+        modalEl.addEventListener('hidden.bs.modal', handleHidden);
+
+        // Use Bootstrap 5 Modal API if available, fallback to jQuery
+        if (globalThis.bootstrap && globalThis.bootstrap.Modal) {
+            const modal = new globalThis.bootstrap.Modal(modalEl);
+            modal.show();
+        } else if (globalThis.jQuery) {
+            globalThis.jQuery(modalEl).modal('show');
+        }
+    }
+
+    /**
+     * Tell the server the user has seen this announcement.
+     * @param {number} announcementId
+     */
+    _markSeen(announcementId) {
+        const markSeenUrl = globalThis['lizUrls']?.announcementMarkSeen;
+        if (!markSeenUrl) {
+            // Store in sessionStorage as fallback for anonymous users
+            try {
+                const key = 'lizmap_announcement_seen';
+                const seen = JSON.parse(sessionStorage.getItem(key) || '[]');
+                if (!seen.includes(announcementId)) {
+                    seen.push(announcementId);
+                    sessionStorage.setItem(key, JSON.stringify(seen));
+                }
+            } catch (e) {
+                // sessionStorage not available
+            }
+            return;
+        }
+
+        const url = new URL(markSeenUrl, window.location.origin);
+        url.searchParams.set('id', announcementId);
+
+        fetch(url.toString(), { method: 'POST' })
+            .catch(err => {
+                console.warn('Failed to mark announcement as seen:', err);
+            });
+    }
+
+    /**
+     * Escape HTML special characters for safe text display.
+     * @param {string} text
+     * @returns {string}
+     */
+    _escapeHtml(text) {
+        const div = document.createElement('div');
+        div.textContent = text;
+        return div.innerHTML;
+    }
+}
diff --git a/assets/src/modules/Lizmap.js b/assets/src/modules/Lizmap.js
index 881428d4d4..da4015f68b 100644
--- a/assets/src/modules/Lizmap.js
+++ b/assets/src/modules/Lizmap.js
@@ -28,6 +28,7 @@ import Permalink from './Permalink.js';
 import Search from './Search.js';
 import Tooltip from './Tooltip.js';
 import LocateByLayer from './LocateByLayer.js';
+import Announcement from './Announcement.js';
 
 import WMSCapabilities from 'ol/format/WMSCapabilities.js';
 import WFSCapabilities from 'ol-wfs-capabilities';
@@ -199,6 +200,9 @@ export default class Lizmap {
                      *     ['lizmap.modules.initialized']
                      * );
                      */
+                    this.announcement = new Announcement();
+                    this.announcement.init();
+
                     eventDispatcher.dispatch('lizmap.modules.initialized');
                 }
             };
diff --git a/lizmap/modules/admin/classes/config.listener.php b/lizmap/modules/admin/classes/config.listener.php
index bc3c62a217..00bd62acb7 100644
--- a/lizmap/modules/admin/classes/config.listener.php
+++ b/lizmap/modules/admin/classes/config.listener.php
@@ -51,6 +51,17 @@ public function onmasteradminGetMenuContent($event)
             );
         }
 
+        // Configure project announcements
+        if (jAcl2::check('lizmap.admin.announcement.manage')) {
+            $bloc->childItems[] = new masterAdminMenuItem(
+                'lizmap_announcements',
+                jLocale::get('admin~admin.menu.lizmap.announcements.label'),
+                jUrl::get('admin~announcement:index'),
+                116,
+                'lizmap'
+            );
+        }
+
         // Configure the theme
         if (jAcl2::check('lizmap.admin.theme.update')) {
             $bloc->childItems[] = new masterAdminMenuItem(
diff --git a/lizmap/modules/admin/controllers/announcement.classic.php b/lizmap/modules/admin/controllers/announcement.classic.php
new file mode 100644
index 0000000000..55438ff24f
--- /dev/null
+++ b/lizmap/modules/admin/controllers/announcement.classic.php
@@ -0,0 +1,238 @@
+<?php
+
+/**
+ * Lizmap administration : project announcements.
+ *
+ * @author    3liz
+ * @copyright 2026 3liz
+ *
+ * @see      http://3liz.com
+ *
+ * @license Mozilla Public License : http://www.mozilla.org/MPL/
+ */
+class announcementCtrl extends jController
+{
+    // Configure access via jacl2 rights management
+    public $pluginParams = array(
+        '*' => array('jacl2.right' => 'lizmap.admin.announcement.manage'),
+    );
+
+    /**
+     * List all announcements.
+     *
+     * @return jResponseHtml
+     */
+    public function index()
+    {
+        /** @var jResponseHtml $rep */
+        $rep = $this->getResponse('html');
+
+        $dao = jDao::get('lizmap~announcement', 'lizlog');
+        $announcements = $dao->findAll();
+        $conditions = jDao::createConditions();
+        $announcementCount = $dao->countBy($conditions);
+
+        $tpl = new jTpl();
+        $tpl->assign('announcements', $announcements);
+        $tpl->assign('announcementCount', $announcementCount);
+        $rep->body->assign('MAIN', $tpl->fetch('announcement_list'));
+        $rep->body->assign('selectedMenuItem', 'lizmap_announcements');
+
+        return $rep;
+    }
+
+    /**
+     * Display the create form.
+     *
+     * @return jResponseHtml
+     */
+    public function create()
+    {
+        /** @var jResponseHtml $rep */
+        $rep = $this->getResponse('html');
+
+        $tpl = new jTpl();
+        $tpl->assign('id', 0);
+        $tpl->assign('title', '');
+        $tpl->assign('content', '');
+        $tpl->assign('target_repository', '');
+        $tpl->assign('target_project', '');
+        $tpl->assign('target_groups', '');
+        $tpl->assign('selectedGroupsArray', array());
+        $tpl->assign('max_display_count', 1);
+        $tpl->assign('is_active', true);
+        $tpl->assign('repositories', lizmap::getRepositoryList());
+        $tpl->assign('groups', jAcl2DbUserGroup::getGroupList());
+        $rep->body->assign('MAIN', $tpl->fetch('announcement_form'));
+        $rep->body->assign('selectedMenuItem', 'lizmap_announcements');
+
+        return $rep;
+    }
+
+    /**
+     * Display the edit form.
+     *
+     * @return jResponseHtml|jResponseRedirect
+     */
+    public function edit()
+    {
+        $id = $this->intParam('id');
+        if (!$id) {
+            /** @var jResponseRedirect $rep */
+            $rep = $this->getResponse('redirect');
+            $rep->action = 'admin~announcement:index';
+
+            return $rep;
+        }
+
+        /** @var jResponseHtml $rep */
+        $rep = $this->getResponse('html');
+
+        $dao = jDao::get('lizmap~announcement', 'lizlog');
+        $record = $dao->get($id);
+
+        if (!$record) {
+            /** @var jResponseRedirect $rep */
+            $rep = $this->getResponse('redirect');
+            jMessage::add(jLocale::get('admin~admin.announcement.error.notfound'), 'error');
+            $rep->action = 'admin~announcement:index';
+
+            return $rep;
+        }
+
+        $tpl = new jTpl();
+        $selectedGroupsArray = !empty($record->target_groups)
+            ? array_map('trim', explode(',', $record->target_groups))
+            : array();
+
+        $tpl->assign('id', $record->id);
+        $tpl->assign('title', $record->title);
+        $tpl->assign('content', $record->content);
+        $tpl->assign('target_repository', $record->target_repository);
+        $tpl->assign('target_project', $record->target_project);
+        $tpl->assign('target_groups', $record->target_groups);
+        $tpl->assign('selectedGroupsArray', $selectedGroupsArray);
+        $tpl->assign('max_display_count', $record->max_display_count);
+        $tpl->assign('is_active', $record->is_active);
+        $tpl->assign('repositories', lizmap::getRepositoryList());
+        $tpl->assign('groups', jAcl2DbUserGroup::getGroupList());
+        $rep->body->assign('MAIN', $tpl->fetch('announcement_form'));
+        $rep->body->assign('selectedMenuItem', 'lizmap_announcements');
+
+        return $rep;
+    }
+
+    /**
+     * Save an announcement (create or update).
+     *
+     * @return jResponseRedirect
+     */
+    public function save()
+    {
+        /** @var jResponseRedirect $rep */
+        $rep = $this->getResponse('redirect');
+
+        $id = $this->intParam('id');
+        $title = $this->param('title');
+        $content = $this->param('content');
+
+        if (!$title || !$content) {
+            jMessage::add(jLocale::get('admin~admin.announcement.error.required'), 'error');
+            $rep->action = 'admin~announcement:index';
+
+            return $rep;
+        }
+
+        $dao = jDao::get('lizmap~announcement', 'lizlog');
+
+        if ($id) {
+            // Update existing
+            $record = $dao->get($id);
+            if (!$record) {
+                jMessage::add(jLocale::get('admin~admin.announcement.error.notfound'), 'error');
+                $rep->action = 'admin~announcement:index';
+
+                return $rep;
+            }
+        } else {
+            // Create new
+            $record = jDao::createRecord('lizmap~announcement', 'lizlog');
+        }
+
+        $record->title = htmlspecialchars($title);
+        $record->content = $content;
+        $record->target_repository = $this->param('target_repository', '');
+        $record->target_project = $this->param('target_project', '');
+
+        // Handle groups multi-select
+        $groups = $this->param('target_groups');
+        if (is_array($groups)) {
+            $record->target_groups = implode(',', $groups);
+        } else {
+            $record->target_groups = $groups ?: '';
+        }
+
+        $record->max_display_count = $this->intParam('max_display_count', 1);
+        $record->is_active = $this->param('is_active') ? true : false;
+
+        if ($id) {
+            $dao->update($record);
+            jMessage::add(jLocale::get('admin~admin.announcement.saved'));
+        } else {
+            $dao->insert($record);
+            jMessage::add(jLocale::get('admin~admin.announcement.created'));
+        }
+
+        $rep->action = 'admin~announcement:index';
+
+        return $rep;
+    }
+
+    /**
+     * Toggle announcement active status.
+     *
+     * @return jResponseRedirect
+     */
+    public function toggle()
+    {
+        /** @var jResponseRedirect $rep */
+        $rep = $this->getResponse('redirect');
+
+        $id = $this->intParam('id');
+        if ($id) {
+            $dao = jDao::get('lizmap~announcement', 'lizlog');
+            $record = $dao->get($id);
+            if ($record) {
+                $record->is_active = !$record->is_active;
+                $dao->update($record);
+                jMessage::add(jLocale::get('admin~admin.announcement.toggled'));
+            }
+        }
+
+        $rep->action = 'admin~announcement:index';
+
+        return $rep;
+    }
+
+    /**
+     * Delete an announcement.
+     *
+     * @return jResponseRedirect
+     */
+    public function delete()
+    {
+        /** @var jResponseRedirect $rep */
+        $rep = $this->getResponse('redirect');
+
+        $id = $this->intParam('id');
+        if ($id) {
+            $dao = jDao::get('lizmap~announcement', 'lizlog');
+            $dao->delete($id);
+            jMessage::add(jLocale::get('admin~admin.announcement.deleted'));
+        }
+
+        $rep->action = 'admin~announcement:index';
+
+        return $rep;
+    }
+}
diff --git a/lizmap/modules/admin/install/install.php b/lizmap/modules/admin/install/install.php
index 7cbdef4995..c9bbc99516 100644
--- a/lizmap/modules/admin/install/install.php
+++ b/lizmap/modules/admin/install/install.php
@@ -34,6 +34,7 @@ public function install()
             jAcl2DbManager::createRight('lizmap.admin.server.information.view', 'admin~jacl2.lizmap.admin.server.information.view', 'lizmap.admin.grp');
             jAcl2DbManager::createRight('lizmap.admin.lizmap.log.view', 'admin~jacl2.lizmap.admin.lizmap.log.view', 'lizmap.admin.grp');
             jAcl2DbManager::createRight('lizmap.admin.lizmap.log.delete', 'admin~jacl2.lizmap.admin.lizmap.log.delete', 'lizmap.admin.grp');
+            jAcl2DbManager::createRight('lizmap.admin.announcement.manage', 'admin~jacl2.lizmap.admin.announcement.manage', 'lizmap.admin.grp');
 
             jAcl2DbManager::createRight('lizmap.repositories.view', 'admin~jacl2.lizmap.repositories.view', 'lizmap.grp'); // the right code could be lizmap.view.repository.projects
             jAcl2DbManager::createRight('lizmap.tools.edition.use', 'admin~jacl2.lizmap.tools.edition.use', 'lizmap.grp');
@@ -57,6 +58,7 @@ public function install()
             jAcl2DbManager::addRight('admins', 'lizmap.admin.server.information.view');
             jAcl2DbManager::addRight('admins', 'lizmap.admin.lizmap.log.view');
             jAcl2DbManager::addRight('admins', 'lizmap.admin.lizmap.log.delete');
+            jAcl2DbManager::addRight('admins', 'lizmap.admin.announcement.manage');
 
             // Create a new publishers group
             jAcl2DbUserGroup::createGroup('Publishers', 'publishers');
diff --git a/lizmap/modules/admin/install/upgrade_announcement_acl.php b/lizmap/modules/admin/install/upgrade_announcement_acl.php
new file mode 100644
index 0000000000..27198c6f11
--- /dev/null
+++ b/lizmap/modules/admin/install/upgrade_announcement_acl.php
@@ -0,0 +1,24 @@
+<?php
+
+class adminModuleUpgrader_announcement_acl extends jInstallerModule
+{
+    public $targetVersions = array(
+        '3.11.0-pre', '3.11.0',
+    );
+    public $date = '2026-02-22';
+
+    public function install()
+    {
+        if ($this->firstExec('acl2_announcement')) {
+            $this->useDbProfile('auth');
+
+            // Create announcement management right
+            jAcl2DbManager::createRight('lizmap.admin.announcement.manage', 'admin~jacl2.lizmap.admin.announcement.manage', 'lizmap.admin.grp');
+
+            // Assign to admins group
+            if (jAcl2DbUserGroup::getGroup('admins')) {
+                jAcl2DbManager::addRight('admins', 'lizmap.admin.announcement.manage');
+            }
+        }
+    }
+}
diff --git a/lizmap/modules/admin/locales/en_US/admin.UTF-8.properties b/lizmap/modules/admin/locales/en_US/admin.UTF-8.properties
index cec9fa2e83..f0ab7d0ee7 100644
--- a/lizmap/modules/admin/locales/en_US/admin.UTF-8.properties
+++ b/lizmap/modules/admin/locales/en_US/admin.UTF-8.properties
@@ -9,6 +9,7 @@ menu.lizmap.landingPageContent.label=Landing page content
 menu.lizmap.logs.label=Lizmap Logs
 menu.lizmap.logs.view.label=View logs
 menu.lizmap.search.label=Lizmap search
+menu.lizmap.announcements.label=Project Announcements
 
 menu.server.label=Server
 
@@ -419,6 +420,47 @@ landingPageContent.unauthed.position.before=Before content for authenticated
 landingPageContent.unauthed.position.after=After content for authenticated
 landingPageContent.unauthed.position.no=No
 
+announcement.list.title=Project Announcements
+announcement.list.empty=No announcements found.
+announcement.create=Create announcement
+announcement.create.title=Create announcement
+announcement.edit.title=Edit announcement
+announcement.col.title=Title
+announcement.col.repository=Repository
+announcement.col.project=Project
+announcement.col.groups=Target groups
+announcement.col.maxviews=Max views
+announcement.col.status=Status
+announcement.col.created=Created
+announcement.col.actions=Actions
+announcement.status.active=Active
+announcement.status.inactive=Inactive
+announcement.btn.edit=Edit
+announcement.btn.activate=Activate
+announcement.btn.deactivate=Deactivate
+announcement.btn.delete=Delete
+announcement.btn.save=Save
+announcement.confirm.delete=Are you sure you want to delete this announcement?
+announcement.form.title=Title
+announcement.form.content=Content (HTML)
+announcement.form.content.help=HTML content that will be displayed in the popup modal.
+announcement.form.repository=Target repository
+announcement.form.repository.help=Leave empty to target all repositories.
+announcement.form.project=Target project
+announcement.form.project.help=Leave empty to target all projects in the selected repository.
+announcement.form.groups=Target groups
+announcement.form.groups.help=Select groups to target. Leave empty to target all users.
+announcement.form.maxviews=Max display count
+announcement.form.maxviews.help=Maximum number of times this announcement will be shown to each user. 0 means unlimited.
+announcement.form.active=Active
+announcement.form.all=All
+announcement.saved=Announcement updated successfully.
+announcement.created=Announcement created successfully.
+announcement.toggled=Announcement status toggled.
+announcement.deleted=Announcement deleted successfully.
+announcement.error.notfound=Announcement not found.
+announcement.error.required=Title and content are required.
+
 landingPageContent.error.save=Error while saving the landing page contents
 landingPageContent.error.submit=An error occurred while saving the content. Your session has been terminated, please retry.
 landingPageContent.saved=Content of the landing page has been saved
diff --git a/lizmap/modules/admin/locales/en_US/jacl2.UTF-8.properties b/lizmap/modules/admin/locales/en_US/jacl2.UTF-8.properties
index 6c978aadbd..afa7e3c9f2 100644
--- a/lizmap/modules/admin/locales/en_US/jacl2.UTF-8.properties
+++ b/lizmap/modules/admin/locales/en_US/jacl2.UTF-8.properties
@@ -15,6 +15,7 @@ lizmap.admin.theme.update=Update the application theme
 lizmap.admin.server.information.view=View the detailed server information
 lizmap.admin.lizmap.log.view=View the lizmap logs
 lizmap.admin.lizmap.log.delete=Delete the lizmap logs
+lizmap.admin.announcement.manage=Manage project announcements
 
 lizmap.repositories.view=View projects in the repository
 lizmap.tools.edition.use=Use the Edition tool
diff --git a/lizmap/modules/admin/templates/announcement_form.tpl b/lizmap/modules/admin/templates/announcement_form.tpl
new file mode 100644
index 0000000000..57ee32fd1e
--- /dev/null
+++ b/lizmap/modules/admin/templates/announcement_form.tpl
@@ -0,0 +1,64 @@
+
+<h1>{if $id}{@admin~admin.announcement.edit.title@}{else}{@admin~admin.announcement.create.title@}{/if}</h1>
+
+<div class="container">
+    <form method="post" action="{jurl 'admin~announcement:save'}">
+        <input type="hidden" name="id" value="{$id}" />
+
+        <div class="mb-3">
+            <label for="title" class="form-label">{@admin~admin.announcement.form.title@}</label>
+            <input type="text" class="form-control" id="title" name="title" value="{$title}" required maxlength="255" />
+        </div>
+
+        <div class="mb-3">
+            <label for="content" class="form-label">{@admin~admin.announcement.form.content@}</label>
+            <textarea class="form-control" id="content" name="content" rows="6" required>{$content}</textarea>
+            <div class="form-text">{@admin~admin.announcement.form.content.help@}</div>
+        </div>
+
+        <div class="mb-3">
+            <label for="target_repository" class="form-label">{@admin~admin.announcement.form.repository@}</label>
+            <select class="form-select" id="target_repository" name="target_repository">
+                <option value="">{@admin~admin.announcement.form.all@}</option>
+                {foreach $repositories as $repo}
+                <option value="{$repo}" {if $target_repository == $repo}selected{/if}>{$repo}</option>
+                {/foreach}
+            </select>
+            <div class="form-text">{@admin~admin.announcement.form.repository.help@}</div>
+        </div>
+
+        <div class="mb-3">
+            <label for="target_project" class="form-label">{@admin~admin.announcement.form.project@}</label>
+            <input type="text" class="form-control" id="target_project" name="target_project" value="{$target_project}" />
+            <div class="form-text">{@admin~admin.announcement.form.project.help@}</div>
+        </div>
+
+        <div class="mb-3">
+            <label for="target_groups" class="form-label">{@admin~admin.announcement.form.groups@}</label>
+            <select class="form-select" id="target_groups" name="target_groups[]" multiple size="5">
+                {foreach $groups as $group}
+                {if $group->grouptype != 2}
+                <option value="{$group->id_aclgrp}" {if in_array($group->id_aclgrp, $selectedGroupsArray)}selected{/if}>{$group->name}</option>
+                {/if}
+                {/foreach}
+            </select>
+            <div class="form-text">{@admin~admin.announcement.form.groups.help@}</div>
+        </div>
+
+        <div class="mb-3">
+            <label for="max_display_count" class="form-label">{@admin~admin.announcement.form.maxviews@}</label>
+            <input type="number" class="form-control" id="max_display_count" name="max_display_count" value="{$max_display_count}" min="0" />
+            <div class="form-text">{@admin~admin.announcement.form.maxviews.help@}</div>
+        </div>
+
+        <div class="mb-3 form-check">
+            <input type="checkbox" class="form-check-input" id="is_active" name="is_active" value="1" {if $is_active}checked{/if} />
+            <label class="form-check-label" for="is_active">{@admin~admin.announcement.form.active@}</label>
+        </div>
+
+        <div class="form-actions">
+            <button type="submit" class="btn btn-primary">{@admin~admin.announcement.btn.save@}</button>
+            <a class="btn btn-secondary" href="{jurl 'admin~announcement:index'}">{@admin~admin.configuration.button.back.label@}</a>
+        </div>
+    </form>
+</div>
diff --git a/lizmap/modules/admin/templates/announcement_list.tpl b/lizmap/modules/admin/templates/announcement_list.tpl
new file mode 100644
index 0000000000..d7995a11d2
--- /dev/null
+++ b/lizmap/modules/admin/templates/announcement_list.tpl
@@ -0,0 +1,55 @@
+
+<h1>{@admin~admin.announcement.list.title@}</h1>
+
+{ifacl2 'lizmap.admin.announcement.manage'}
+<div class="container">
+
+    <div class="mb-3">
+        <a class="btn btn-primary" href="{jurl 'admin~announcement:create'}">{@admin~admin.announcement.create@}</a>
+    </div>
+
+    {if $announcementCount == 0}
+    <p>{@admin~admin.announcement.list.empty@}</p>
+    {else}
+    <table class="table table-bordered table-striped">
+        <thead>
+            <tr>
+                <th>{@admin~admin.announcement.col.title@}</th>
+                <th>{@admin~admin.announcement.col.repository@}</th>
+                <th>{@admin~admin.announcement.col.project@}</th>
+                <th>{@admin~admin.announcement.col.groups@}</th>
+                <th>{@admin~admin.announcement.col.maxviews@}</th>
+                <th>{@admin~admin.announcement.col.status@}</th>
+                <th>{@admin~admin.announcement.col.created@}</th>
+                <th>{@admin~admin.announcement.col.actions@}</th>
+            </tr>
+        </thead>
+        <tbody>
+            {foreach $announcements as $item}
+            <tr>
+                <td>{$item->title}</td>
+                <td>{$item->target_repository}</td>
+                <td>{$item->target_project}</td>
+                <td>{$item->target_groups}</td>
+                <td>{$item->max_display_count}</td>
+                <td>
+                    {if $item->is_active}
+                    <span class="badge bg-success">{@admin~admin.announcement.status.active@}</span>
+                    {else}
+                    <span class="badge bg-secondary">{@admin~admin.announcement.status.inactive@}</span>
+                    {/if}
+                </td>
+                <td>{$item->created_at|jdatetime:'db_datetime','lang_datetime'}</td>
+                <td>
+                    <a class="btn btn-sm btn-outline-primary" href="{jurl 'admin~announcement:edit', array('id'=>$item->id)}">{@admin~admin.announcement.btn.edit@}</a>
+                    <a class="btn btn-sm btn-outline-secondary" href="{jurl 'admin~announcement:toggle', array('id'=>$item->id)}">{if $item->is_active}{@admin~admin.announcement.btn.deactivate@}{else}{@admin~admin.announcement.btn.activate@}{/if}</a>
+                    <a class="btn btn-sm btn-outline-danger" href="{jurl 'admin~announcement:delete', array('id'=>$item->id)}" onclick="return confirm('{@admin~admin.announcement.confirm.delete@}')">{@admin~admin.announcement.btn.delete@}</a>
+                </td>
+            </tr>
+            {/foreach}
+        </tbody>
+    </table>
+    {/if}
+
+</div>
+{/ifacl2}
diff --git a/lizmap/modules/admin/urls.xml b/lizmap/modules/admin/urls.xml
index 27b708ad9d..ec6ef357a2 100644
--- a/lizmap/modules/admin/urls.xml
+++ b/lizmap/modules/admin/urls.xml
@@ -54,4 +54,11 @@
     <url pathinfo="/lizmap_search/edit"  action="lizmap_search:edit"/>
     <url pathinfo="/lizmap_search/save"  action="lizmap_search:save"/>
 
+    <url pathinfo="/announcements" action="announcement:index"/>
+    <url pathinfo="/announcements/create" action="announcement:create"/>
+    <url pathinfo="/announcements/save" action="announcement:save"/>
+    <url pathinfo="/announcements/:id/edit" action="announcement:edit"/>
+    <url pathinfo="/announcements/:id/toggle" action="announcement:toggle"/>
+    <url pathinfo="/announcements/:id/delete" action="announcement:delete"/>
+
 </suburls>
diff --git a/lizmap/modules/lizmap/controllers/announcement.classic.php b/lizmap/modules/lizmap/controllers/announcement.classic.php
new file mode 100644
index 0000000000..fca56cd366
--- /dev/null
+++ b/lizmap/modules/lizmap/controllers/announcement.classic.php
@@ -0,0 +1,128 @@
+<?php
+
+/**
+ * Lizmap announcement controller for the frontend map view.
+ *
+ * @author    3liz
+ * @copyright 2026 3liz
+ *
+ * @see      http://3liz.com
+ *
+ * @license Mozilla Public License : http://www.mozilla.org/MPL/
+ */
+class announcementCtrl extends jController
+{
+    /**
+     * Get pending announcements for the current user and project.
+     *
+     * @return jResponseJson
+     */
+    public function pending()
+    {
+        /** @var jResponseJson $rep */
+        $rep = $this->getResponse('json');
+
+        $repository = $this->param('repository', '');
+        $project = $this->param('project', '');
+
+        $dao = jDao::get('lizmap~announcement', 'lizlog');
+        $activeAnnouncements = $dao->findActive();
+
+        $isConnected = jAuth::isConnected();
+        $usr_login = '';
+        $userGroups = array();
+
+        if ($isConnected) {
+            $usr_login = jAuth::getUserSession()->login;
+            $groups = jAcl2DbUserGroup::getGroupList($usr_login);
+            foreach ($groups as $group) {
+                $userGroups[] = $group->id_aclgrp;
+            }
+        }
+
+        $viewDao = jDao::get('lizmap~announcementView', 'lizlog');
+
+        $pending = array();
+        foreach ($activeAnnouncements as $announcement) {
+            // Filter by repository
+            if (!empty($announcement->target_repository) && $announcement->target_repository !== $repository) {
+                continue;
+            }
+
+            // Filter by project
+            if (!empty($announcement->target_project) && $announcement->target_project !== $project) {
+                continue;
+            }
+
+            // Filter by groups
+            if (!empty($announcement->target_groups)) {
+                $targetGroups = explode(',', $announcement->target_groups);
+                $targetGroups = array_map('trim', $targetGroups);
+                if (!$isConnected || empty(array_intersect($targetGroups, $userGroups))) {
+                    continue;
+                }
+            }
+
+            // Check view count for authenticated users
+            if ($isConnected && $announcement->max_display_count > 0) {
+                $view = $viewDao->getByAnnouncementAndUser($announcement->id, $usr_login);
+                if ($view && $view->view_count >= $announcement->max_display_count) {
+                    continue;
+                }
+            }
+
+            $pending[] = array(
+                'id' => (int) $announcement->id,
+                'title' => $announcement->title,
+                'content' => $announcement->content,
+            );
+        }
+
+        $rep->data = array('announcements' => $pending);
+
+        return $rep;
+    }
+
+    /**
+     * Mark an announcement as seen by the current user.
+     *
+     * @return jResponseJson
+     */
+    public function markSeen()
+    {
+        /** @var jResponseJson $rep */
+        $rep = $this->getResponse('json');
+
+        if (!jAuth::isConnected()) {
+            $rep->data = array('status' => 'ok');
+
+            return $rep;
+        }
+
+        $announcementId = $this->intParam('id');
+        if (!$announcementId) {
+            $rep->data = array('status' => 'error', 'message' => 'Missing announcement id');
+
+            return $rep;
+        }
+
+        $usr_login = jAuth::getUserSession()->login;
+        $viewDao = jDao::get('lizmap~announcementView', 'lizlog');
+
+        $view = $viewDao->getByAnnouncementAndUser($announcementId, $usr_login);
+        if ($view) {
+            $view->view_count = $view->view_count + 1;
+            $viewDao->update($view);
+        } else {
+            $record = jDao::createRecord('lizmap~announcementView', 'lizlog');
+            $record->announcement_id = $announcementId;
+            $record->usr_login = $usr_login;
+            $record->view_count = 1;
+            $viewDao->insert($record);
+        }
+
+        $rep->data = array('status' => 'ok');
+
+        return $rep;
+    }
+}
diff --git a/lizmap/modules/lizmap/daos/announcement.dao.xml b/lizmap/modules/lizmap/daos/announcement.dao.xml
new file mode 100644
index 0000000000..50c6cd365d
--- /dev/null
+++ b/lizmap/modules/lizmap/daos/announcement.dao.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<dao xmlns="http://jelix.org/ns/dao/1.0">
+    <datasources>
+        <primarytable name="lizmap_announcement" realname="lizmap_announcement" primarykey="id" />
+    </datasources>
+    <record>
+        <property name="id" fieldname="id" datatype="integer" autoincrement="true" default=""/>
+        <property name="title" fieldname="title" datatype="string" required="true" maxlength="255"/>
+        <property name="content" fieldname="content" datatype="text" required="true"/>
+        <property name="target_repository" fieldname="target_repository" datatype="string" maxlength="100"/>
+        <property name="target_project" fieldname="target_project" datatype="string" maxlength="100"/>
+        <property name="target_groups" fieldname="target_groups" datatype="text"/>
+        <property name="max_display_count" fieldname="max_display_count" datatype="integer" default="1"/>
+        <property name="created_at" fieldname="created_at" datatype="datetime" insertpattern="now()"/>
+        <property name="updated_at" fieldname="updated_at" datatype="datetime" insertpattern="now()" updatepattern="now()"/>
+        <property name="is_active" fieldname="is_active" datatype="boolean" default="true"/>
+    </record>
+    <factory>
+        <method name="findActive" type="select">
+            <conditions>
+                <eq property="is_active" value="1" />
+            </conditions>
+            <order>
+                <orderitem property="created_at" way="desc" />
+            </order>
+        </method>
+
+        <method name="findAll" type="select">
+            <order>
+                <orderitem property="created_at" way="desc" />
+            </order>
+        </method>
+    </factory>
+</dao>
diff --git a/lizmap/modules/lizmap/daos/announcementView.dao.xml b/lizmap/modules/lizmap/daos/announcementView.dao.xml
new file mode 100644
index 0000000000..17bd99e468
--- /dev/null
+++ b/lizmap/modules/lizmap/daos/announcementView.dao.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<dao xmlns="http://jelix.org/ns/dao/1.0">
+    <datasources>
+        <primarytable name="lizmap_announcement_views" realname="lizmap_announcement_views" primarykey="id" />
+    </datasources>
+    <record>
+        <property name="id" fieldname="id" datatype="integer" autoincrement="true" default=""/>
+        <property name="announcement_id" fieldname="announcement_id" datatype="integer" required="true"/>
+        <property name="usr_login" fieldname="usr_login" datatype="string" required="true" maxlength="100"/>
+        <property name="view_count" fieldname="view_count" datatype="integer" default="0"/>
+        <property name="last_viewed_at" fieldname="last_viewed_at" datatype="datetime" insertpattern="now()" updatepattern="now()"/>
+    </record>
+    <factory>
+        <method name="getByAnnouncementAndUser" type="selectfirst">
+            <parameter name="announcement_id"/>
+            <parameter name="usr_login"/>
+            <conditions>
+                <eq property="announcement_id" expr="$announcement_id" />
+                <eq property="usr_login" expr="$usr_login" />
+            </conditions>
+        </method>
+    </factory>
+</dao>
diff --git a/lizmap/modules/lizmap/install/install.php b/lizmap/modules/lizmap/install/install.php
index c4d3fff88d..166ae1313d 100644
--- a/lizmap/modules/lizmap/install/install.php
+++ b/lizmap/modules/lizmap/install/install.php
@@ -43,6 +43,9 @@ public function install()
             $this->useDbProfile('lizlog');
             $this->execSQLScript('sql/lizlog');
 
+            // Add announcement tables
+            $this->execSQLScript('sql/lizannouncement');
+
             // Add geobookmark table
             $this->useDbProfile('jauth');
             $this->execSQLScript('sql/lizgeobookmark');
diff --git a/lizmap/modules/lizmap/install/sql/lizannouncement.pgsql.sql b/lizmap/modules/lizmap/install/sql/lizannouncement.pgsql.sql
new file mode 100644
index 0000000000..494fe671dc
--- /dev/null
+++ b/lizmap/modules/lizmap/install/sql/lizannouncement.pgsql.sql
@@ -0,0 +1,21 @@
+CREATE TABLE IF NOT EXISTS lizmap_announcement (
+    id SERIAL PRIMARY KEY,
+    title character varying(255) NOT NULL,
+    content TEXT NOT NULL,
+    target_repository character varying(100),
+    target_project character varying(100),
+    target_groups TEXT,
+    max_display_count INTEGER DEFAULT 1,
+    created_at timestamp DEFAULT CURRENT_TIMESTAMP,
+    updated_at timestamp DEFAULT CURRENT_TIMESTAMP,
+    is_active BOOLEAN DEFAULT TRUE
+);
+
+CREATE TABLE IF NOT EXISTS lizmap_announcement_views (
+    id SERIAL PRIMARY KEY,
+    announcement_id INTEGER NOT NULL REFERENCES lizmap_announcement(id) ON DELETE CASCADE,
+    usr_login character varying(100) NOT NULL,
+    view_count INTEGER DEFAULT 0,
+    last_viewed_at timestamp DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(announcement_id, usr_login)
+);
diff --git a/lizmap/modules/lizmap/install/sql/lizannouncement.sqlite.sql b/lizmap/modules/lizmap/install/sql/lizannouncement.sqlite.sql
new file mode 100644
index 0000000000..9af6a9e1b6
--- /dev/null
+++ b/lizmap/modules/lizmap/install/sql/lizannouncement.sqlite.sql
@@ -0,0 +1,19 @@
+CREATE TABLE IF NOT EXISTS "lizmap_announcement" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE,
+    "title" VARCHAR NOT NULL,
+    "content" TEXT NOT NULL,
+    "target_repository" VARCHAR,
+    "target_project" VARCHAR,
+    "target_groups" TEXT,
+    "max_display_count" INTEGER DEFAULT 1,
+    "created_at" DATETIME DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" DATETIME DEFAULT CURRENT_TIMESTAMP,
+    "is_active" INTEGER DEFAULT 1);
+
+CREATE TABLE IF NOT EXISTS "lizmap_announcement_views" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE,
+    "announcement_id" INTEGER NOT NULL REFERENCES "lizmap_announcement"("id") ON DELETE CASCADE,
+    "usr_login" VARCHAR NOT NULL,
+    "view_count" INTEGER DEFAULT 0,
+    "last_viewed_at" DATETIME DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE("announcement_id", "usr_login"));
diff --git a/lizmap/modules/lizmap/install/upgrade_announcement.php b/lizmap/modules/lizmap/install/upgrade_announcement.php
new file mode 100644
index 0000000000..0b755c3f95
--- /dev/null
+++ b/lizmap/modules/lizmap/install/upgrade_announcement.php
@@ -0,0 +1,17 @@
+<?php
+
+class lizmapModuleUpgrader_announcement extends jInstallerModule
+{
+    public $targetVersions = array(
+        '3.11.0-pre', '3.11.0',
+    );
+    public $date = '2026-02-22';
+
+    public function install()
+    {
+        if ($this->firstExec('announcement')) {
+            $this->useDbProfile('lizlog');
+            $this->execSQLScript('sql/lizannouncement');
+        }
+    }
+}
diff --git a/lizmap/modules/lizmap/urls.xml b/lizmap/modules/lizmap/urls.xml
index 38c18b1d4d..84115d3f13 100644
--- a/lizmap/modules/lizmap/urls.xml
+++ b/lizmap/modules/lizmap/urls.xml
@@ -22,4 +22,7 @@
     <url pathinfo="/repo/:repository/:project/config"       action="service:getProjectConfig"/>
 
 
+    <url pathinfo="/announcement/pending" action="announcement:pending"/>
+    <url pathinfo="/announcement/mark-seen" action="announcement:markSeen"/>
+
 </suburls>
diff --git a/lizmap/modules/view/controllers/lizAjax.classic.php b/lizmap/modules/view/controllers/lizAjax.classic.php
index 2e73da1979..c53016f636 100644
--- a/lizmap/modules/view/controllers/lizAjax.classic.php
+++ b/lizmap/modules/view/controllers/lizAjax.classic.php
@@ -173,6 +173,8 @@ public function map()
             'nominatim' => jUrl::getFull('lizmap~osm:nominatim'),
             'edition' => jUrl::getFull('lizmap~edition:getFeature'),
             'permalink' => jUrl::getFull('view~map:index'),
+            'announcement' => jUrl::getFull('lizmap~announcement:pending'),
+            'announcementMarkSeen' => jUrl::getFull('lizmap~announcement:markSeen'),
         );
 
         // Get optional WMS public url list
diff --git a/lizmap/modules/view/controllers/lizMap.classic.php b/lizmap/modules/view/controllers/lizMap.classic.php
index 35472a8424..014ea46759 100644
--- a/lizmap/modules/view/controllers/lizMap.classic.php
+++ b/lizmap/modules/view/controllers/lizMap.classic.php
@@ -218,6 +218,8 @@ public function index()
             'basepath' => $bp,
             'geobookmark' => jUrl::get('lizmap~geobookmark:index'),
             'service' => jUrl::get('lizmap~service:index').'?repository='.$repository.'&project='.$project,
+            'announcement' => jUrl::get('lizmap~announcement:pending'),
+            'announcementMarkSeen' => jUrl::get('lizmap~announcement:markSeen'),
             'resourceUrlReplacement' => array(),
         );