Suffolk

Suffolk, county, eastern Massachusetts, U.S., bordered on the east by Massachusetts Bay and Boston Harbor. It consists of a hilly coastal region and includes several islands. The primary waterways are the Charles, Mystic, and Chelsea rivers, as well as Chestnut Hill Reservoir and Jamaica and Sprague ponds. Parklands include Boston National Historic Park, Boston Harbor Islands State Park, and Boston Common. Suffolk was created in May 1643 as one of Massachusetts’s three original counties and...