Beaver Brook is a former MBTA Commuter Rail station in Waltham, Massachusetts.

The grade crossing of Main Street (Route 20) at the station was proposed for elimination in 1913 and 1923; it was finally replaced by a bridge slightly to the east in 1935–36 – the first grade crossing elimination conducted as a Works Progress Administration project.

[2][3][4] In December 1958, Beaver Brook was one of eleven stations – four commuter rail stations in Waltham and Weston, and seven stops west of Fitchburg – on the Fitchburg Route proposed for closure.

All three stops served only rush hour trains at the time of their closing.

[1] The station building is no longer extant, but a short section of platform remains.