Washington -- U.S. County in Rhode Island Population (2000): 123546 Housing Units (2000): 56816 Land area (2000): 332.754295 sq. miles (861.829632 sq. km) Water area (2000): 230.018626 sq. miles (595.745481 sq. km) Total area (2000): 562.772921 sq. miles (1457.575113 sq. km) Located within: Rhode Island (RI), FIPS 44 Location: 41.454545 N, 71.581152 W Headwords: Washington Washington, RI Washington County Washington County, RI