The 45th state of the Union was Utah, admitted on January 4, 1896. The 47th state of the Union was New Mexico, admitted on January 6, 1912.

Quick Scoop

  • 45th state: Utah.
  • 47th state: New Mexico.
  • If you meant the 45th and 47th U.S. presidents instead of states, that would be a different answer.