A township of Plymouth county, Massachusetts, U.S.A., about 20 m. S. of Boston. Pop. (1890) 5213; (1900) 53 2 7; (1910 U.S. census) 6928. Area, about 10 sq. m. It is served by the New York, New Haven & Hartford railway, and by interurban electric railway. Among its manufactures are boots and shoes and tacks. There is a public library (1878). Rockland was erected into a township in 1874, having been previously a part of Abington.