In the early colonial days, Vine Brook, which runs through Lexington, Burlington, and Bedford, and then empties into the Shawsheen River, was a focal point of the farming and industry of the town. It provided for many types of mills, and in the 20th Century, for farm irrigation. For decades, Lexington grew modestly while remaining largely a farming community, providing Boston with much of its
Lexington is located at 42°26′39″N 71°13′36″W (42.444345, -71.226928). According to the United States Census Bureau, the town has a total area of 16.5 square miles (42.8 km²), of which 16.4 square miles (42.5 km²) is land and 0.1 square miles (0.4 km²), or 0.85%, is water. Lexington borders the following towns: Burlington, Woburn, Winchester, Arlington, Belmont, Waltham, Lincoln, and Bedford. It has more area than all other municipalities that it borders.