The Old Colony History Museum (OCHM) is located at 66 Church Green in Taunton, Bristol County, Massachusetts, United States.

The building was designed in 1852 by Richard Upjohn, architect of New York City's Trinity Church, and is listed on the National Register of Historic Places as part of the Church Green Historic District.

The museum was previously located in the former Union Mission Chapel on Cedar Street.

The museum maintains an online archive of materials relating to Taunton manufacturer Reed & Barton.

[1] Each autumn, the Museum holds a Liberty and Union Festival to commemorate the events of October 1774, and to celebrate the Taunton Flag.