Ipswich, town (1990 pop. 11,873), Essex co., NE Mass., on the Ipswich River and Ipswich Bay; inc. 1634. Ipswich clams are found there. Tourism and the production of electronic and wood products are important. Crane's Beach, one of the country's most beautiful beaches, is in Ipswich. Of interest are the many well-preserved colonial and historic buildings; Choate Bridge, the first stone bridge in the United States (1764); and the John Whipple House (c.1640), with the Ipswich Historical Society collection. An air force radar experimental station is also there.