| State | Postal Code | Capital | Admitted to Union | President at Admission |
| Alabama | AL | Montgomery | December 14, 1819 (22nd) | James Monroe |
| Alaska | AK | Juneau | January 3, 1959 (49th) | Dwight David Eisenhower |
| Arizona | AZ | Phoenix | February 14, 1912 (48th) | William Howard Taft |
| Arkansas | AR | Little Rock | June 15, 1836 (25th) | Andrew Jackson |
| California | CA | Sacramento | September 9, 1850 (31st) | Millard Fillmore |
| Colorado | CO | Denver | August 1, 1876 (38th) | Ulysses Simpson Grant |
| Connecticut | CT | Hartford | January 9, 1788 (5th) | None |
| Delaware | DE | Dover | December 7, 1787 (1st) | None |
| Florida | FL | Tallahassee | March 3, 1845 (27th) | John Tyler |
| Georgia | GA | Atlanta | January 2, 1788 (4th) | None |
| Hawaii | HI | Honolulu | August 21, 1959 (50th) | Dwight David Eisenhower |
| Idaho | ID | Boise | July 3, 1890 (43rd) | Benjamin Harrison |
| Illinois | IL | Springfield | December 3, 1818 (21st) | James Monroe |
| Indiana | IN | Indianapolis | December 11, 1816 (19th) | James Madison |
| Iowa | IA | Des Moines | December 28, 1846 (29th) | James Knox Polk |
| Kansas | KS | Topeka | January 29, 1861 (34th) | James Buchanan |
| Kentucky | KY | Frankfort | June 1, 1792 (15th) | George Washington |
| Louisiana | LA | Baton Rouge | April 30, 1812 (18th) | James Madison |
| Maine | ME | Augusta | March 15, 1820 (23rd) | James Monroe |
| Maryland | MD | Annapolis | April 28, 1788 (7th) | None |
| Massachusetts | MA | Boston | February 6, 1788 (6th) | None |
| Michigan | MI | Lansing | January 26, 1837 (26th) | Andrew Jackson |
| Minnesota | MN | St. Paul | May 11, 1858 (32nd) | James Buchanan |
| Mississippi | MS | Jackson | December 10, 1817 (20th) | James Monroe |
| Missouri | MO | Jefferson City | August 10, 1821 (24th) | James Monroe |
| Montana | MT | Helena | November 8, 1889 (41st) | Benjamin Harrison |
| Nebraska | NE | Lincoln | March 1, 1867 (37th) | Andrew Johnson |
| Nevada | NV | Carson City | October 31, 1864 (36th) | Abraham Lincoln |
| New Hampshire | NH | Concord | June 21, 1788 (9th) | None |
| New Jersey | NJ | Trenton | December 18, 1787 (3rd) | None |
| New Mexico | NM | Santa Fe | January 6, 1912 (47th) | William Howard Taft |
| New York | NY | Albany | July 26, 1788 (11th) | None |
| North Carolina | NC | Raleigh | November 21, 1789 (12th) | George Washington |
| North Dakota | ND | Bismarck | November 2, 1889 (39th) | Benjamin Harrison |
| Ohio | OH | Columbus | March 1, 1803 (17th) | Thomas Jefferson |
| Oklahoma | OK | Oklahoma City | November 16, 1907 (46th) | Theodore Roosevelt |
| Oregon | OR | Salem | February 14, 1859 (33rd) | James Buchanan |
| Pennsylvania | PA | Harrisburg | December 12, 1787 (2nd) | None |
| Rhode Island | RI | Providence | May 29, 1790 (13th) | George Washington |
| South Carolina | SC | Columbia | May 23, 1788 (8th) | None |
| South Dakota | SD | Pierre | November 2, 1889 (40th) | Benjamin Harrison |
| Tennessee | TN | Nashville | June 1, 1796 (16th) | George Washington |
| Texas | TX | Austin | December 29, 1845 (28th) | James Knox Polk |
| Utah | UT | Salt Lake City | January 4, 1896 (45th) | Grover Cleveland |
| Vermont | VT | Montpelier | March 4, 1791 (14th) | George Washington |
| Virginia | VA | Richmond | June 25, 1788 (10th) | None |
| Washington | WA | Olympia | November 11, 1889 (42nd) | Benjamin Harrison |
| West Virginia | WV | Charleston | June 20, 1863 (35th) | Abraham Lincoln |
| Wisconsin | WI | Madison | May 29, 1848 (30th) | James Knox Polk |
| Wyoming | WY | Cheyenne | July 10, 1890 (44th) | Benjamin Harrison |
Note on admission: Under Article 7 of the United States Constitution, the Constitution was not enacted until nine states had ratified it. Therefore, technically Delaware, Pennsylvania, New Jersey, Georgia, Connecticut, Massachusetts, Maryland, South Carolina, and New Hampshire (the first nine states) all entered the union together on June 21, 1788, when New Hampshire became the 9th state to ratify the Constitution. By the time of the first presidential election, eleven states had ratified the Constitution (but only ten participated in the election). For these early states, the date is the date ratified rather than the date admitted.