| Rank | State Name | Date of Union Entry |
|---|---|---|
| 1 | Delaware | December 7, 1787 |
| 2 | Pennsylvania | December 12, 1787 |
| 3 | New Jersey | December 18, 1787 |
| 4 | Georgia | January 2, 1788 |
| 5 | Connecticut | January 9, 1788 |
| 6 | Massachusetts | February 6, 1788 |
| 7 | Maryland | April 28, 1788 |
| 8 | South Carolina | May 23, 1788 |
| 9 | New Hampshire | June 21, 1788 |
| 10 | Virginia | June 25, 1788 |
| 11 | New York | July 26, 1788 |
| 12 | North Carolina | November 21, 1789 |
| 13 | Rhode Island | May 29, 1790 |
| 14 | Vermont | March 4, 1791 |
| 15 | Kentucky | June 1, 1792 |
| 16 | Tennessee | June 1, 1796 |
| 17 | Ohio | March 1, 1803 |
| 18 | Louisiana | April 30, 1812 |
| 19 | Indiana | December 11, 1816 |
| 20 | Mississippi | December 10, 1817 |
| 21 | Illinois | December 3, 1818 |
| 22 | Alabama | December 14, 1819 |
| 23 | Maine | March 15, 1820 |
| 24 | Missouri | August 10, 1821 |
| 25 | Arkansas | June 15, 1836 |
| 26 | Michigan | January 26, 1837 |
| 27 | Florida | March 3, 1845 |
| 28 | Texas | December 29, 1845 |
| 29 | Iowa | December 28, 1846 |
| 30 | Wisconsin | May 29, 1848 |
| 31 | California | September 9, 1850 |
| 32 | Minnesota | May 11, 1858 |
| 33 | Oregon | February 14, 1859 |
| 34 | Kansas | January 29, 1861 |
| 35 | West Virginia | June 20, 1863 |
| 36 | Nevada | October 31, 1864 |
| 37 | Nebraska | March 1, 1867 |
| 38 | Colorado | August 1, 1876 |
| 39 | North Dakota | November 2, 1889 |
| 40 | South Dakota | November 2, 1889 |
| 41 | Montana | November 8, 1889 |
| 42 | Washington | November 11, 1889 |
| 43 | Idaho | July 3, 1890 |
| 44 | Wyoming | July 10, 1890 |
| 45 | Utah | January 4, 1896 |
| 46 | Oklahoma | November 16, 1907 |
| 47 | New Mexico | January 6, 1912 |
| 48 | Arizona | February 14, 1912 |
| 49 | Alaska | January 3, 1959 |
| 50 | Hawaii | August 21, 1959 |
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