Ipswich is a non-metropolitan district in Suffolk, England on the estuary of the River Orwell. The town of the same name 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. As of 2006, the borough is estimated to have a population of approximately 120,000 inhabitants.