The Acushnet Heights Historic District is a predominantly residential historic district in central New Bedford, Massachusetts. It encompasses a densely-built urban area about 20 acres (8.1 ha) in size, which was developed as a working-class area, beginning in the 1860s, for the many workers in the city's factories. The major employer for many of the district's residents were the Wamsutta Mills, which were located east of Purchase Street, which forms the district's eastern boundary. The northern boundary is Linden Street, the western is County Street (except for a section of Robeson Street to its west), and the southern boundary is Pope Street and Clasky Common Park. The park, which is the area's major open space, was laid out in 1822 and enlarged to its present size in 1853.