States Added to the Union Post Civil War By SaraKPilot Mar 1, 1867 Nebraska Aug 1, 1876 Colorado Nov 2, 1889 North Dakota Nov 2, 1889 South Dakota Nov 8, 1889 Montana Nov 11, 1889 Washington Jul 3, 1890 Idaho Jul 10, 1890 Wyoming Jan 4, 1896 Utah Nov 16, 1907 Oklahoma Jan 6, 1912 New Mexico Feb 14, 1912 Arizona Jan 3, 1959 Alaska Aug 21, 1959 Hawaii
