diff --git a/changelog/unreleased/kong/feat-plugin-conf-ws-id.yml b/changelog/unreleased/kong/feat-plugin-conf-ws-id.yml
new file mode 100644
index 000000000000..06ab3da5da3d
--- /dev/null
+++ b/changelog/unreleased/kong/feat-plugin-conf-ws-id.yml
@@ -0,0 +1,3 @@
+message: Added the workspace id into the plugin config in the plugins iterator.
+type: feature
+scope: Core
diff --git a/kong/runloop/plugins_iterator.lua b/kong/runloop/plugins_iterator.lua
index 78a6421011a6..ea0325b02d5b 100644
--- a/kong/runloop/plugins_iterator.lua
+++ b/kong/runloop/plugins_iterator.lua
@@ -161,6 +161,7 @@ local function get_plugin_config(plugin, name, ws_id)
   cfg.consumer_id = plugin.consumer and plugin.consumer.id
   cfg.plugin_instance_name = plugin.instance_name
   cfg.__plugin_id = plugin.id
+  cfg.__ws_id = ws_id
 
   local key = kong.db.plugins:cache_key(name,
                                         cfg.route_id,
diff --git a/spec/02-integration/07-sdk/04-plugin-config_spec.lua b/spec/02-integration/07-sdk/04-plugin-config_spec.lua
index b56e98e73112..2a02efec0daf 100644
--- a/spec/02-integration/07-sdk/04-plugin-config_spec.lua
+++ b/spec/02-integration/07-sdk/04-plugin-config_spec.lua
@@ -49,5 +49,6 @@ describe("Plugin configuration", function()
     local body = assert.status(200, res)
     local json = cjson.decode(body)
     assert.equal("test", json.plugin_instance_name)
+    assert.equal(kong.default_workspace, json.__ws_id)
   end)
 end)