Alexander Long (December 24, 1816 – November 28, 1886) was a Democratic United States Congressman who served in Congress from March 4, 1863, to March 3, 1865.
During the Civil War, Long was a prominent "Copperhead", a member of the peace movement of the Democratic Party, and he was identified as being one of the war's most vehement opponents.
Even though Long was a "free-soiler" Democrat who in his early years voted to repeal the "Black Laws of Ohio", he later opposed both emancipation and suffrage for blacks.