Old Watertown High School is a historic school building at 341 Mount Auburn Street in Watertown, Massachusetts, United States.

The 3+1⁄2 story brick building was built in 1913 by local architect Charles Brigham.

Now an assisted living facility named Brigham House, the English Revival structure is one of Watertown's most imposing public buildings, standing about one mile east of Watertown center.

[2] The building was listed on the National Register of Historic Places in 2006.

This article about a National Register of Historic Places listing in Middlesex County Massachusetts is a stub.