Ipswich (previously Gyppeswick in variant spellings) is a non-metropolitan district and the county town of Suffolk, England. It is located on the estuary of the River Orwell. Nearby towns are Felixstowe in Suffolk and Harwich and Colchester in Essex.

The town of Ipswich overspills the borough boundaries significantly, with only 85% of the town's population living within the borough at the time of the 2001 Census, when it was the third-largest settlement in the United Kingdom's East of England region, and the 38th largest urban area in England.