Andover is a town in Oxford County, Maine, United States. The population was 752 at the 2020 census. Set among mountains and crossed by the Appalachian Trail, Andover is home to the Lovejoy Covered Bridge and is the site of the Andover Earth Station.

The land which became known as Andover was originally purchased in 1788 by a group of proprietors mostly from Andover, Massachusetts. The original proprietors were Jonathan Abbot, Philip Abbott, Ebenezer Adams, Ingalls Bragg, Samuel Farnum, Samuel Johnson, Abiel Lovejoy, Benjamin Poor, Eben Poor, Jr., and Theodore Stevens, all of Andover, Massachusetts; John York of Bethel, Massachusetts; Joseph Frye of Fryeburg, Massachusetts; and Josiah Bean, Ezekiel Merrill, and Thomas Poor of Methuen, Massachusetts. The town was first settled in 1789 by Ezekiel Merrill and his family who were transported there from Bethel, Maine, in canoes managed by members of the local Pequawket tribe. The first saw-mill was built on the East Branch of the Ellis River by Col. Thomas Poor in 1791 and was used to provide the lumber for the still standing Merrill-Poor House.

The town was incorporated on June 23, 1804, as East Andover, and then renamed Andover in 1820 when Maine separated from Massachusetts.