But despite this split, the town remained politically one unit.For many years Andover was geographically one of the largest towns in the Commonwealth of Massachusetts; in 1826 a third parish was established and West Parish Church was constructed on Reservation Road.
Brown was arrested in Andover, Massachusetts but because he could not afford the ,000 bail, he was taken to Salem for trial. Brown wanted to plead guilty but Justice Samuel Chase wanted him to name everybody who had helped him or who subscribed to his writings.
Although they did not arrive in time for the battle that day, they did go on to participate in the battle of Bunker Hill two months later and fought in subsequent skirmishes with the Redcoats during the war.
Among the Andover men who were representatives to the Massachusetts Constitutional Convention of 1779–1780 were Colonel Samuel Osgood, Zebadiah Abbot, John Farnum and Samuel Phillips Jr.
Brown refused, was fined 0, and sentenced to eighteen months in prison, the most severe sentence then imposed under the Alien and Sedition Acts.
On January 6, 1853, Benjamin "Bennie" Pierce, the 11-year-old son of President-elect Franklin Pierce was killed in a train accident in town.
During the Salem witch trials in 1692, Andover resident Joseph Ballard asked for help for his wife from several girls in the neighboring Salem Village who were already identifying witches there.