Wilmington is a town in Middlesex County, Massachusetts, United States.
According to the United States Census Bureau, the CDP has a total area of 17.2 square miles (45 km2), of which 17.1 square miles (44 km2) is land and 0.1 square miles (0.26 km2), or 0.46%, is water. Wilmington borders the towns of Andover, North Reading, Reading, Woburn, Burlington, Billerica, and Tewksbury. Much of Wilmington was built on or still is wetlands. The Ipswich River starts in Wilmington, and the Shawsheen River forms part of Wilmington's border with Billerica. There is one lake in the town, Silver Lake, a kettle lake formed in the retreat of the Pleistocene glaciers at the end of the last ice age. It is open for swimming during the summer.
As of the census of 2010, there were 22,325 people, 7,532 households, and 6,020 families residing in the town. The population density was 1,313.0 inhabitants per square mile (507.0 /km2). There were 7,808 housing units at an average density of 455.3 per square mile (175.8 /km2).
Image: "Church Street, Wilmington MA" by John Phelan - Own work. Licensed under CC BY 3.0 via Wikimedia Commons.