diff --git a/netbox/ipam/filtersets.py b/netbox/ipam/filtersets.py
index b23322a22..5c8dbc780 100644
--- a/netbox/ipam/filtersets.py
+++ b/netbox/ipam/filtersets.py
@@ -232,6 +232,19 @@ class ASNFilterSet(OrganizationalModelFilterSet, TenancyFilterSet):
         to_field_name='slug',
         label=_('RIR (slug)'),
     )
+    site_group_id = TreeNodeMultipleChoiceFilter(
+        queryset=SiteGroup.objects.all(),
+        field_name='sites__group',
+        lookup_expr='in',
+        label=_('Site group (ID)'),
+    )
+    site_group = TreeNodeMultipleChoiceFilter(
+        queryset=SiteGroup.objects.all(),
+        field_name='sites__group',
+        lookup_expr='in',
+        to_field_name='slug',
+        label=_('Site group (slug)'),
+    )
     site_id = django_filters.ModelMultipleChoiceFilter(
         field_name='sites',
         queryset=Site.objects.all(),
diff --git a/netbox/ipam/forms/filtersets.py b/netbox/ipam/forms/filtersets.py
index a4faa18ed..183636148 100644
--- a/netbox/ipam/forms/filtersets.py
+++ b/netbox/ipam/forms/filtersets.py
@@ -142,7 +142,7 @@ class ASNFilterForm(TenancyFilterForm, NetBoxModelFilterSetForm):
     model = ASN
     fieldsets = (
         FieldSet('q', 'filter_id', 'tag'),
-        FieldSet('rir_id', 'site_id', name=_('Assignment')),
+        FieldSet('rir_id', 'site_group_id', 'site_id', name=_('Assignment')),
         FieldSet('tenant_group_id', 'tenant_id', name=_('Tenant')),
     )
     rir_id = DynamicModelMultipleChoiceField(
@@ -150,6 +150,11 @@ class ASNFilterForm(TenancyFilterForm, NetBoxModelFilterSetForm):
         required=False,
         label=_('RIR')
     )
+    site_group_id = DynamicModelMultipleChoiceField(
+        queryset=SiteGroup.objects.all(),
+        required=False,
+        label=_('Site group')
+    )
     site_id = DynamicModelMultipleChoiceField(
         queryset=Site.objects.all(),
         required=False,
diff --git a/netbox/ipam/tests/test_filtersets.py b/netbox/ipam/tests/test_filtersets.py
index 5455beb9c..6281f7b41 100644
--- a/netbox/ipam/tests/test_filtersets.py
+++ b/netbox/ipam/tests/test_filtersets.py
@@ -133,10 +133,18 @@ class ASNTestCase(TestCase, ChangeLoggedFilterSetTests):
         )
         ASN.objects.bulk_create(asns)
 
+        site_groups = (
+            SiteGroup(name='Site Group 1', slug='site-group-1'),
+            SiteGroup(name='Site Group 2', slug='site-group-2'),
+            SiteGroup(name='Site Group 3', slug='site-group-3'),
+        )
+        for site_group in site_groups:
+            site_group.save()
+
         sites = [
-            Site(name='Site 1', slug='site-1'),
-            Site(name='Site 2', slug='site-2'),
-            Site(name='Site 3', slug='site-3')
+            Site(name='Site 1', slug='site-1', group=site_groups[0]),
+            Site(name='Site 2', slug='site-2', group=site_groups[1]),
+            Site(name='Site 3', slug='site-3', group=site_groups[2]),
         ]
         Site.objects.bulk_create(sites)
         asns[0].sites.set([sites[0]])
@@ -178,6 +186,13 @@ class ASNTestCase(TestCase, ChangeLoggedFilterSetTests):
         params = {'rir': [rirs[0].slug, rirs[1].slug]}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
 
+    def test_site_group(self):
+        site_groups = SiteGroup.objects.all()[:2]
+        params = {'site_group_id': [site_groups[0].pk, site_groups[1].pk]}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
+        params = {'site_group': [site_groups[0].slug, site_groups[1].slug]}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
+
     def test_site(self):
         sites = Site.objects.all()[:2]
         params = {'site_id': [sites[0].pk, sites[1].pk]}