Colby Hall is an historic building on the campus of Andover Newton Theological School at 141 Herrick Road in the village of Newton Centre in Newton, Massachusetts. It was built in 1866 in a mixture of Second Empire and Romanesque styles. It was named for Gardner Colby (1810–79), who was treasurer of the school and also was the benefactor of Waterville College in Maine, which changed its name to Colby College in his honor. On January 30, 1978. it was added to the National Register of Historic Places.