Lincoln is a town in Middlesex County, Massachusetts, United States. The population was 7,014 according to the 2020 United States Census, including residents of Hanscom Air Force Base who live within town limits. The town, located in the MetroWest region of Boston's suburbs, has a large amount of colonial history and a sizeable amount of public conservation land.

Hanscom Air Force Base (AFB) is a United States Air Force base located predominantly within Bedford, Massachusetts, with portions extending into the adjoining towns of Lincoln, Concord and Lexington. The facility is adjacent to Hanscom Field which provides general aviation and charter service.