Twenty-three properties are included within the Hopkinton Center Historic District, a local historic district which comprises properties around the Town Common, on East Main St. and the south side of Main St. The district was expanded in 2000 to include the Town Hall and in 2001 to include Center School. The Hopkinton Supply Company Building on Main St., located slightly west of the district, is listed in the National Register of Historic Places. Former factory worker housing in the center of town, contrasted against the more rural areas surrounding it, are visual reminders of Hopkinton's past.