South Acton is a passenger rail station on the MBTA Commuter Rail Fitchburg Line, in Acton Massachusetts, off Route 27 near Route 2. It is the busiest station on the Fitchburg line, averaging 902 weekday passenger boardings and generating 15% of the line's traffic. It serves as a park and ride station for Acton and other suburbs of Boston.
The town manages 6 parking lots near the station and 2 more in West Acton and Kelley's Corner.