Ipswich is a coastal town in Essex County, Massachusetts, United States. The population was 13,785 at the 2020 census. Home to Willowdale State Forest and Sandy Point State Reservation, Ipswich includes the southern part of Plum Island. A residential community with a vibrant tourism industry, the town is famous for its clams, celebrated annually at the Ipswich Chowderfest, and for Crane Beach, a barrier beach near the Crane estate. Ipswich was incorporated as a town in 1634.