The Merak Commuter Line or simply Merak Line, formerly Merak Local Train, is a local commuter rail service operated by KAI Commuter from Merak Station to Rangkasbitung Station in Banten, Indonesia. The service, which was reactivated on 1 April 2017, has a travel time up to 2 hours. It is one of the means of transportation for Merak residents to travel to Rangkasbitung. On the Commuterline travel map, the route is colored dark green, so sometimes the service is often referred to as the Dark Green Line.

PT Kereta Commuter Indonesia is a subsidiary of the Indonesian national railway company PT Kereta Api Indonesia (KAI) which manages commuter rail services. Initially founded as an operator of Greater Jakarta commuter rail, the company currently responsible to several commuter rail and local train systems in Indonesia.