though incorporated on February 12, 1812, its original territory has been completely divided among the towns of Fairfield, Smithfield, Mercer, Rome, Belgrade, and Oakland.
Formerly West Pond Plantation, the town was probably named for General Henry Dearborn, a Revolutionary War veteran and Secretary of War under President Jefferson. The town surrendered its organized status on April 20, 1841.
Anson P. Morrill, a former postmaster in Dearborn, was appointed by the legislature the first Republican Governor of Maine in 1855. No candidate in the election had received a majority.
Records of Dearborn Maine. Winthrop, Me. Daughters of the American Revolution, Patience Stanley Chapter, D.A.R.. 1937.