Sunnen station is a light rail station on the Blue Line of the St. Louis MetroLink system. This at-grade station is located on Sunnen Drive adjacent to the only level crossing on the Cross County alignment. It is the least used station on the MetroLink system.

The station has a park and ride lot with 96 spaces and includes a kiss-and-ride area.

Station layout

The platforms are accessed by stairs and ramps at each end of the station.

Side platform, doors will open on the right
Westbound	←      Blue Line toward Shrewsbury–Lansdowne I-44 (Terminus)
Eastbound	←      Blue Line toward Fairview Heights (Maplewood–Manchester) →
Side platform, doors will open on the right
Street	Entrance/exit, park and ride lot