Anson Peaslee Morrill was an American politician who served as the 24th governor of Maine from 1855 to 1856 and later as the U.S. representative from Maine's 4th congressional district from 1861 to 1863.

Maine's 4th congressional district was a congressional district in Maine. It was created in 1821 after Maine achieved statehood in 1820 due to the result of the ratification of the Missouri Compromise. It was eliminated in 1933 after the 1930 U.S. census. Its last congressman was Donald F. Snow.