US 50 States: When the States Joined America! By shelbyfavre22 Period: Jan 1, 1787 to Jan 1, 1960 Years of Joining Dec 7, 1787 Delaware Dec 12, 1787 Pennsylvania Dec 18, 1787 New Jersey Jan 2, 1788 Georgia Jan 9, 1788 Connecticut Feb 6, 1788 Massachusetts Apr 28, 1788 Maryland May 23, 1788 South Carolina Jun 21, 1788 New Hampshire Jun 25, 1788 Virginia Jul 26, 1788 New York Nov 21, 1789 North Carolina May 29, 1790 Rhode Island Mar 4, 1791 Vermont Jun 1, 1792 Kentucky Jun 1, 1796 Tennessee Mar 1, 1803 Ohio Apr 30, 1812 Louisiana Dec 11, 1816 Indiana Dec 10, 1817 Mississippi Dec 3, 1818 Illinois Dec 14, 1819 Alabama Mar 19, 1820 Maine Aug 10, 1821 Missouri Mar 3, 1835 Florida Jun 15, 1836 Arkansas Jan 26, 1837 Michigan Dec 29, 1845 Texas Dec 28, 1846 Iowa May 29, 1848 Wisconsin Sep 9, 1850 California May 11, 1858 Minnesota Feb 14, 1859 Oregon Jan 29, 1861 Kansas Jun 20, 1863 West Virginia Oct 31, 1864 Nevada 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 Jul 10, 1890 Utah Nov 16, 1907 Oklahoma Jan 6, 1912 New Mexico Feb 14, 1912 Arizona Jan 3, 1959 Alaska Aug 21, 1959 Hawaii