Alexander is a town in Washington County, Maine. It was incorporated on January 19, 1825 from Plantation Number 16, and reportedly named for Alexander Baring, also known as Lord Ashburton, the British envoy who, along with Daniel Webster, settled Maine's northern boundary in the Webster-Ashburton Treaty that ended the Aroostook War. On February 22, 1838, Alexander annexed land from the neighboring town of Cooper; then on April 2, 1859, it gave up land to the town of Crawford.