diff --git a/lemarche/templates/admin/anonymize_confirmation.html b/lemarche/templates/admin/anonymize_confirmation.html
new file mode 100644
index 000000000..15a2f617f
--- /dev/null
+++ b/lemarche/templates/admin/anonymize_confirmation.html
@@ -0,0 +1,33 @@
+{% extends "admin/delete_selected_confirmation.html" %}  
+{% load admin_urls i18n %}
+
+{% block breadcrumbs %}
+<div class="breadcrumbs">
+<a href="{% url 'admin:index' %}">{% translate 'Home' %}</a>
+&rsaquo; <a href="{% url 'admin:app_list' app_label=opts.app_label %}">{{ opts.app_config.verbose_name }}</a>
+&rsaquo; <a href="{% url opts|admin_urlname:'changelist' %}">{{ opts.verbose_name_plural|capfirst }}</a>
+&rsaquo; Anonymiser plusieurs utilisateurs
+</div>
+{% endblock %}
+
+{% block content %}
+    
+    <h2>Utilisateurs à anonymiser</h2>
+    {% for anonymizable_object in queryset %}
+        <ul>{{ anonymizable_object }}</ul>
+    {% endfor %}
+    
+    <form method="post">{% csrf_token %}
+        <div>
+            {% for obj in queryset %}
+            <input type="hidden" name="user_id" value="{{ obj.pk }}">
+            {% endfor %}
+        <input type="hidden" name="action" value="delete_selected">
+        <input type="hidden" name="post" value="yes">
+        <input type="submit" value="{% translate 'Yes, I’m sure' %}">
+        <a href="#" class="button cancel-link">{% translate "No, take me back" %}</a>
+        </div>
+
+    </form>
+    
+{% endblock %}
diff --git a/lemarche/users/admin.py b/lemarche/users/admin.py
index 4fe1f333c..99c9e0af0 100644
--- a/lemarche/users/admin.py
+++ b/lemarche/users/admin.py
@@ -5,7 +5,9 @@
 from django.contrib.auth.admin import UserAdmin
 from django.contrib.contenttypes.admin import GenericTabularInline
 from django.db import models
-from django.urls import reverse
+from django.http import HttpResponseRedirect
+from django.template.response import TemplateResponse
+from django.urls import path, reverse
 from django.utils.html import format_html
 from fieldsets_with_inlines import FieldsetsInlineMixin
 
@@ -211,6 +213,7 @@ class UserAdmin(FieldsetsInlineMixin, UserAdmin):
     search_fields = ["id", "email", "first_name", "last_name"]
     search_help_text = "Cherche sur les champs : ID, E-mail, Prénom, Nom"
     ordering = ["-created_at"]
+    actions = ["anonymize_users"]
 
     autocomplete_fields = ["company", "partner_network"]
     readonly_fields = (
@@ -357,6 +360,42 @@ def get_search_results(self, request, queryset, search_term):
             queryset = queryset.is_admin_bizdev()
         return queryset, use_distinct
 
+    def get_urls(self):
+        # https://docs.djangoproject.com/en/5.1/ref/contrib/admin/#django.contrib.admin.ModelAdmin.get_urls
+        urls = super().get_urls()
+        my_urls = [
+            path("anonymise_users/", self.admin_site.admin_view(self.anonymize_users_view), name="anonymize_users"),
+            *urls,  # these patterns last, because they can match a lot of urls
+        ]
+        return my_urls
+
+    def anonymize_users_view(self, request):
+        """Confirmation page after selecting users to anonymize."""
+
+        if request.method == "GET":
+            # Display confirmation page
+            ids = request.GET.getlist("user_id")
+            queryset = self.model.objects.filter(id__in=ids)
+            context = {
+                # Include common variables for rendering the admin template.
+                **self.admin_site.each_context(request),
+                "opts": self.opts,
+                "queryset": queryset,
+            }
+            return TemplateResponse(request, "admin/anonymize_confirmation.html", context)
+
+        if request.method == "POST":
+            # anonymize users
+            ids = request.POST.getlist("user_id")
+            queryset = self.model.objects.filter(id__in=ids)
+
+            queryset.exclude(id=request.user.id).anonymize_update()
+            SiaeUser.objects.filter(user__is_anonymized=True).delete()
+
+            self.message_user(request, "L'anonymisation s'est déroulée avec succès")
+
+            return HttpResponseRedirect(reverse("admin:users_user_changelist"))
+
     def save_formset(self, request, form, formset, change):
         """
         Set Note author on create
@@ -402,3 +441,14 @@ def extra_data_display(self, instance: User = None):
         return "-"
 
     extra_data_display.short_description = User._meta.get_field("extra_data").verbose_name
+
+    @admin.action(description="Anonymiser les utilisateurs sélectionnés")
+    def anonymize_users(self, request, queryset):
+        """Wipe personal data of all selected users and unlink from SiaeUser
+        The logged user is excluded to avoid any mistakes"""
+        # https://docs.djangoproject.com/en/5.1/ref/contrib/admin/actions/#actions-that-provide-intermediate-pages
+
+        selected = queryset.values_list("pk", flat=True)
+        return HttpResponseRedirect(
+            f"{reverse('admin:anonymize_users')}?{'&'.join(f'user_id={str(pk)}' for pk in selected)}"
+        )
diff --git a/lemarche/users/management/commands/anonymize_old_users.py b/lemarche/users/management/commands/anonymize_old_users.py
index 90f70bb41..104bfe415 100644
--- a/lemarche/users/management/commands/anonymize_old_users.py
+++ b/lemarche/users/management/commands/anonymize_old_users.py
@@ -1,11 +1,7 @@
 from dateutil.relativedelta import relativedelta
 from django.conf import settings
-from django.contrib.auth.hashers import UNUSABLE_PASSWORD_PREFIX
-from django.contrib.postgres.functions import RandomUUID
 from django.core.management.base import BaseCommand
 from django.db import transaction
-from django.db.models import F, Value
-from django.db.models.functions import Concat
 from django.template import defaulttags
 from django.utils import timezone
 
@@ -62,20 +58,8 @@ def anonymize_old_users(self, expiry_date: timezone.datetime, dry_run: bool):
         qs = User.objects.filter(last_login__lte=expiry_date, is_anonymized=False)
         users_to_update_count = qs.count()
 
-        qs.update(
-            is_active=False,  # inactive users are allowed to log in standard login views
-            is_anonymized=True,
-            email=Concat(F("id"), Value("@domain.invalid")),
-            first_name="",
-            last_name="",
-            phone="",
-            api_key=None,
-            api_key_last_updated=None,
-            # https://docs.djangoproject.com/en/5.1/ref/contrib/auth/#django.contrib.auth.models.User.set_unusable_password
-            # Imitating the method but in sql. Prevent password reset attempt
-            # Random string is to avoid chances of impersonation by admins https://code.djangoproject.com/ticket/20079
-            password=Concat(Value(UNUSABLE_PASSWORD_PREFIX), RandomUUID()),
-        )
+        qs.anonymize_update()
+
         # remove anonymized users in Siaes
         SiaeUser.objects.filter(user__is_anonymized=True).delete()
 
diff --git a/lemarche/users/models.py b/lemarche/users/models.py
index 0abd372a8..dde3b13d8 100644
--- a/lemarche/users/models.py
+++ b/lemarche/users/models.py
@@ -1,10 +1,12 @@
 from django.conf import settings
 from django.contrib.auth.base_user import BaseUserManager
+from django.contrib.auth.hashers import UNUSABLE_PASSWORD_PREFIX
 from django.contrib.auth.models import AbstractUser
 from django.contrib.contenttypes.fields import GenericRelation
+from django.contrib.postgres.functions import RandomUUID
 from django.db import models
-from django.db.models import Count
-from django.db.models.functions import Greatest, Lower
+from django.db.models import Count, F, Value
+from django.db.models.functions import Concat, Greatest, Lower
 from django.db.models.signals import post_save, pre_save
 from django.dispatch import receiver
 from django.forms.models import model_to_dict
@@ -61,6 +63,23 @@ def with_latest_activities(self):
             )
         )
 
+    def anonymize_update(self):
+        """Wipe or replace personal data stored on User model only"""
+        return self.update(
+            is_active=False,  # inactive users are allowed to log in standard login views
+            is_anonymized=True,
+            email=Concat(F("id"), Value("@domain.invalid")),
+            first_name="",
+            last_name="",
+            phone="",
+            api_key=None,
+            api_key_last_updated=None,
+            # https://docs.djangoproject.com/en/5.1/ref/contrib/auth/#django.contrib.auth.models.User.set_unusable_password
+            # Imitating the method but in sql. Prevent password reset attempt
+            # Random string is to avoid chances of impersonation by admins https://code.djangoproject.com/ticket/20079
+            password=Concat(Value(UNUSABLE_PASSWORD_PREFIX), RandomUUID()),
+        )
+
 
 class UserManager(BaseUserManager):
     """
diff --git a/lemarche/users/tests.py b/lemarche/users/tests.py
index 321f7ed33..3463b2118 100644
--- a/lemarche/users/tests.py
+++ b/lemarche/users/tests.py
@@ -3,10 +3,12 @@
 from unittest.mock import patch
 
 from dateutil.relativedelta import relativedelta
+from django.contrib.messages import get_messages
 from django.core.management import call_command
 from django.core.validators import validate_email
 from django.db.models import F
 from django.test import TestCase, override_settings
+from django.urls import reverse
 from django.utils import timezone
 
 from lemarche.companies.factories import CompanyFactory
@@ -311,3 +313,36 @@ def test_dryrun_warn_command(self):
         call_command("anonymize_old_users", dry_run=True, stdout=self.std_out)
 
         self.assertFalse(TemplateTransactionalSendLog.objects.all())
+
+
+class UserAdminTestCase(TestCase):
+    def setUp(self):
+        UserFactory(is_staff=False, is_anonymized=False)
+        super_user = UserFactory(is_staff=True, is_superuser=True)
+        self.client.force_login(super_user)
+
+    def test_anonymize_action(self):
+        """Test the anonymize_users action from the admin"""
+
+        users_ids = User.objects.values_list("id", flat=True)
+        data = {
+            "action": "anonymize_users",
+            "_selected_action": users_ids,
+        }
+        # https://docs.djangoproject.com/en/5.1/ref/contrib/admin/#reversing-admin-urls
+        change_url = reverse("admin:users_user_changelist")
+        response = self.client.post(path=change_url, data=data)
+
+        self.assertEqual(response.status_code, 302)
+
+        data_confirm = {"user_id": users_ids}
+
+        # click on confirm after seeing the confirmation page
+        response_confirm = self.client.post(response.url, data=data_confirm)
+        self.assertEqual(response.status_code, 302)
+
+        self.assertTrue(User.objects.filter(is_staff=False).first().is_anonymized)
+        self.assertFalse(User.objects.filter(is_staff=True).first().is_anonymized)
+
+        messages_strings = [str(message) for message in get_messages(response_confirm.wsgi_request)]
+        self.assertIn("L'anonymisation s'est déroulée avec succès", messages_strings)