South Sudbury was a commuter rail station in Sudbury, Massachusetts. It was located at the junction of the Central Massachusetts Railroad and the Framingham and Lowell Railroad slightly north of Boston Post Road in South Sudbury. The Boston and Maine Railroad station was incorporated into the MBTA Commuter Rail through subsidies in 1965. The station was closed in November 1971 when the branch's last remaining round trip was discontinued. The 1952-built station building was a private business until its closure in 2019, and the building is now abandoned. In August 2023 the Massachusetts Department of Conservation and Recreation offered the building to the Town of Sudbury at no cost.

The Framingham and Lowell Railroad was a railroad in Middlesex County, Massachusetts. It was incorporated in 1870 to provide a rail connection between the growing railroad hub of Framingham and the important mill city of Lowell, passing through the towns of Sudbury, Concord, Acton, Carlisle, Westford and Chelmsford. The 26.1 mile line opened on October 1, 1871.