| State | Entered Union | Year Settled |
| Delaware | Dec. 7, 1787 | 1638 |
| Pennsylvania | Dec. 12, 1787 | 1682 |
| New Jersey | Dec. 18, 1787 | 1660 |
| Georgia | Jan. 2, 1788 | 1733 |
| Connecticut | Jan. 9, 1788 | 1634 |
| Massachusetts | Feb. 6, 1788 | 1620 |
| Maryland | Apr. 28, 1788 | 1634 |
| South Carolina | May 23, 1788 | 1670 |
| New Hampshire | June 21, 1788 | 1623 |
| Virginia | June 25, 1788 | 1607 |
| New York | July 26, 1788 | 1614 |
| North Carolina | Nov. 21, 1789 | 1660 |
| Rhode Island | May 29, 1790 | 1636 |
| Vermont | Mar. 4, 1791 | 1724 |
| Kentucky | June 1, 1792 | 1774 |
| Tennessee | June 1, 1796 | 1769 |
| Ohio | Mar. 1, 1803 | 1788 |
| Louisiana | Apr. 30, 1812 | 1699 |
| Indiana | Dec. 11, 1816 | 1733 |
| Mississippi | Dec. 10, 1817 | 1699 |
| Illinois | Dec. 3, 1818 | 1720 |
| Alabama | Dec. 14, 1819 | 1702 |
| Maine | Mar. 15, 1820 | 1624 |
| Missouri | Aug. 10, 1821 | 1735 |
| Arkansas | June 15, 1836 | 1686 |
| Michigan | Jan. 26, 1837 | 1668 |
| Florida | Mar. 3, 1845 | 1565 |
| Texas | Dec. 29, 1845 | 1682 |
| Iowa | Dec. 28, 1846 | 1788 |
| Wisconsin | May 29, 1848 | 1766 |
| California | Sept. 9, 1850 | 1769 |
| Minnesota | May 11, 1858 | 1805 |
| Oregon | Feb. 14, 1859 | 1811 |
| Kansas | Jan. 29, 1861 | 1727 |
| West Virginia | June 20, 1863 | 1727 |
| Nevada | Oct. 31, 1864 | 1849 |
| Nebraska | Mar. 1, 1867 | 1823 |
| Colorado | Aug. 1, 1876 | 1858 |
| North Dakota | Nov. 2, 1889 | 1812 |
| South Dakota | Nov. 2, 1889 | 1859 |
| Montana | Nov. 8, 1889 | 1809 |
| Washington | Nov. 11, 1889 | 1811 |
| Idaho | July 3, 1890 | 1842 |
| Wyoming | July 10, 1890 | 1834 |
| Utah | Jan. 4, 1896 | 1847 |
| Oklahoma | Nov. 16, 1907 | 1889 |
| New Mexico | Jan. 6, 1912 | 1610 |
| Arizona | Feb. 14, 1912 | 1776 |
| Alaska | Jan. 3, 1959 | 1784 |
| Hawaii | Aug. 21, 1959 | 1820 |