The Harvard Center Historic District is a historic district encompassing the traditional village center of Harvard, Massachusetts, USA. The district is centered on the town common, a triangular grassy space bounded by Elm Street, Still River Road, and Ayer Road. The common is ringed by residences, civic and religious buildings, and a small commercial area. The common was laid out when the town was founded in 1732, and has grown, mainly in periods of growth at the late 18th and late 19th/early 20th centuries. Most of the village's buildings post-date 1831.The district was added to the National Register of Historic Places in 1997.