They weren't able to vote but they were counted in the census: The Three-Fifths Clause of the United States Constitution (1787) - See more at: http://www.blackpast.org/aah/three-fifths-clause-united-states-constitution-1787#sthash.H73r8se3.dpufuntil after the Civil War and Constitutional Amendments 13, 14, and 15.Jim.