Concord is a town in Middlesex County, Massachusetts, in the United States. At the 2010 census, the town population was 17,668. The United States Census Bureau considers Concord part of Greater Boston. The town center is near where the confluence of the Sudbury and Assabet rivers forms the Concord River.
The area that became the town of Concord was originally known as Musketaquid, an Algonquian word for "grassy plain." Concord was established in 1635 by a handful of British settlers; by 1775, the population had grown to 1,400.