diff --git a/ansible/group_vars/all/network b/ansible/group_vars/all/network
index 109fa90d6..998a2d823 100644
--- a/ansible/group_vars/all/network
+++ b/ansible/group_vars/all/network
@@ -15,11 +15,11 @@ provision_oc_net_name: 'provision_oc_net'
 
 # Name of the network used by the overcloud hosts to manage the bare metal
 # compute hosts via their out-of-band management controllers.
-oob_wl_net_name: 'oob_wl_net'
+oob_wl_net_name: "{{ 'oob_wl_net' if kolla_enable_ironic | bool else None }}"
 
 # Name of the network used by the overcloud hosts to provision the bare metal
 # workload hosts.
-provision_wl_net_name: 'provision_wl_net'
+provision_wl_net_name: "{{ 'provision_wl_net' if kolla_enable_ironic | bool else None }}"
 
 # Name of the network used to expose the internal OpenStack API endpoints.
 internal_net_name: 'internal_net'
@@ -57,7 +57,7 @@ swift_storage_replication_net_name: "{{ storage_mgmt_net_name }}"
 
 # Name of the network used to perform hardware introspection on the bare metal
 # workload hosts.
-inspection_net_name: 'inspection_net'
+inspection_net_name: "{{ 'inspection_net' if kolla_enable_ironic | bool else None }}"
 
 # Name of the network used to perform cleaning on the bare metal workload
 # hosts
diff --git a/releasenotes/notes/disable-ironic-networks-86ba35f58f317ab6.yaml b/releasenotes/notes/disable-ironic-networks-86ba35f58f317ab6.yaml
new file mode 100644
index 000000000..2530b44f3
--- /dev/null
+++ b/releasenotes/notes/disable-ironic-networks-86ba35f58f317ab6.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    The overcloud networks for Ironic (workload out-of-band, workload
+    provisioning, workload cleaning and workload inspection)
+    are now disabled by default if Ironic is not enabled.