Sumner station is a train station in the city of Sumner, Washington, United States. It is served by Line S, a Sounder commuter rail line operated by Sound Transit. The station is located to the southwest of downtown Sumner and includes two platforms, a bus station, and 302 parking spaces. Commuter train service to Sumner began in September 2000 at a temporary station, while the permanent facility opened on March 10, 2001. Parking at the station is expected to expand to over 600 stalls in 2025, after the completion of a new parking garage and pedestrian bridge.