Wrentham is a town in Norfolk County, Massachusetts, United States. The population was 10,955 at the 2010 census. Wrentham is the only Wrentham in the United States. It is named after the village of Wrentham in Beccles, Suffolk, England, which is located about 105 miles north east of London, a couple of miles inland from the North Sea. The only other Wrentham is Wrentham, Alberta, Canada, about 70 miles north of the border with Montana. Wrentham, Mass. is by far the most populous of the three.