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| YEAR | DATE | EVENT | GOVERNOR |
| 1889 | 14 july | Tripartite German-UK-U.S. protectorate | |
| 1900 | 17 april | U.S. territory | Benjamin Franklin Tilley |
| 1901 | 27 november | Uriel Sebree | |
| 1902 | 16 december | Henry Minett | |
| 1903 | 5 may | Edmund Beardsley Underwood | |
| 1905 | 30 january | Charles Brainard Taylor Moore | |
| 1908 | 21 may | John Frederick Parker | |
| 1910 | 20 november | William Michael Crose | |
| 1913 | 14 march | Nathan Woodworth Post (I) | |
| 1913 | 14 july | Clark Daniel Stearns | |
| 1914 | 2 october | Nathan Woodworth Post (II) | |
| 1914 | 6 december | Charles Armijo Woodruff | |
| 1915 | 1 march | John Martin Poyer | |
| 1919 | 10 june | Warren Jay Terhune | |
| 1920 | 11 november | Waldo Evans | |
| 1922 | 1 march | Edwin Taylor Pollock | |
| 1923 | 4 september | Edward Stanley Kellogg | |
| 1925 | 17 march | Henry Francis Bryan | |
| 1927 | 9 september | Stephen Victor Graham | |
| 1929 | 2 august | Gatewood Sanders Lincoln (I) | |
| 1931 | 24 march | James Sutherland Spore | |
| 1931 | 22 april | Arthur Tenney Emerson | |
| 1931 | 17 july | Gatewood Sanders Lincoln (II) | |
| 1932 | 12 may | George Bertram Landenberger | |
| 1934 | 10 april | Thomas Calloway Latimore | |
| 1934 | 17 april | Otto Carl Dowling | |
| 1936 | 15 january | Thomas Benjamin Fitzpatrick | |
| 1936 | 20 january | MacGillivray Milne | |
| 1938 | 26 june | Edward William Hanson | |
| 1940 | 30 july | Jesse Rink Wallace | |
| 1940 | 8 august | Laurence Wild | |
| 1942 | 5 june | John Gould Moyer | |
| 1944 | 8 february | Allen Hobbs | |
| 1945 | 27 january | Ralph Waldo Hungerford | |
| 1945 | 3 september | Samuel Wakefield Canan | |
| 1947 | 22 april | Vernon Huber | |
| 1949 | 7 july | Thomas Francis Darden, Jr. | |
| 1951 | 23 february | Not incorporated U.S. Territory | Phelps Phelps |
| 1952 | 16 july | John C. Elliott | |
| 1952 | 28 november | James Arthur Ewing | |
| 1953 | 4 march | Lawrence M. Judd | |
| 1953 | 1 october | Richard Barrett Lowe | |
| 1956 | 15 october | Peter Tali Coleman (I) | |
| 1960 | 22 april | Not incorporated self-govening U.S. Territory | |
| 1961 | 27 may | Hyrum Rex Lee (I) | |
| 1967 | 31 july | Owen Stuart Aspinall | |
| 1969 | 1 august | John Morse Haydon | |
| 1974 | 15 october | Frank C. Mockler | |
| 1975 | 6 february | Earl B. Ruth | |
| 1976 | 30 september | Frank Barnett | |
| 1977 | 27 may | Hyrum Rex Lee (II) | |
| 1978 | 3 january | Peter Tali Coleman (II) | |
| 1985 | 3 january | A.P. Lutali (I) | |
| 1989 | 2 jnauary | Peter Tali Coleman (III) | |
| 1993 | 3 january | A.P. Lutali (II) | |
| 1997 | 3 january | Tauese P. Sunia | |
| 2003 | 26 march | Togiola Tulafono | |
| 2013 | 3 january | Lolo Matalasi Moliga | |
| 2021 | 3 january | Lemanu Peleti Mauga |