The 50 member-states of the United States of America, with date of admission to the Union:
- State / Date Admitted to Union
- 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