diff --git a/changelogs/fragments/inventory-private-network-info.yml b/changelogs/fragments/inventory-private-network-info.yml
new file mode 100644
index 0000000..1c4a545
--- /dev/null
+++ b/changelogs/fragments/inventory-private-network-info.yml
@@ -0,0 +1,2 @@
+minor_changes:
+  - inventory plugin - Add list of all private networks to server variables.
diff --git a/plugins/inventory/hcloud.py b/plugins/inventory/hcloud.py
index ab2d79f..bba015d 100644
--- a/plugins/inventory/hcloud.py
+++ b/plugins/inventory/hcloud.py
@@ -222,8 +222,18 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
             self.inventory.set_variable(server.name, "ipv6_network", to_native(server.public_net.ipv6.network))
             self.inventory.set_variable(server.name, "ipv6_network_mask", to_native(server.public_net.ipv6.network_mask))
 
+        self.inventory.set_variable(
+            server.name,
+            "private_networks",
+            [
+                {"name": n.network.name, "id": n.network.id, "ip": n.ip}
+                for n in server.private_net
+            ],
+        )
+
         if self.get_option("network"):
             for server_private_network in server.private_net:
+                # Set private_ipv4 if user filtered for one network
                 if server_private_network.network.id == self.network.id:
                     self.inventory.set_variable(server.name, "private_ipv4", to_native(server_private_network.ip))