diff --git a/netbox/dcim/forms/bulk_edit.py b/netbox/dcim/forms/bulk_edit.py
index 6ed483c79..bc9693afb 100644
--- a/netbox/dcim/forms/bulk_edit.py
+++ b/netbox/dcim/forms/bulk_edit.py
@@ -1,4 +1,5 @@
 from django import forms
+from django.conf import settings
 from django.contrib.auth.models import User
 from django.utils.translation import gettext as _
 from timezone_field import TimeZoneFormField
@@ -1292,8 +1293,13 @@ class InterfaceBulkEditForm(
                         break
 
                 if site is not None:
-                    self.fields['untagged_vlan'].widget.add_query_param('site_id', site.pk)
-                    self.fields['tagged_vlans'].widget.add_query_param('site_id', site.pk)
+                    # Query for VLANs assigned to the same site and VLANs with no site assigned (null).
+                    self.fields['untagged_vlan'].widget.add_query_param(
+                        'site_id', [site.pk, settings.FILTERS_NULL_CHOICE_VALUE]
+                    )
+                    self.fields['tagged_vlans'].widget.add_query_param(
+                        'site_id', [site.pk, settings.FILTERS_NULL_CHOICE_VALUE]
+                    )
 
             self.fields['parent'].choices = ()
             self.fields['parent'].widget.attrs['disabled'] = True