| Tutuila/Districts | Percent distribution | ||||||||
| Year | Population | Total | Eastern | Western | Manu'a/Swains | Total | Eastern | Western | Manu'a/Swains |
| 2010 | 55,519 | 54,359 | 23,030 | 31,329 | 1,160 | 100.0 | 41.5 | 56.4 | 2.1 |
| 2000 | 57,291 | 55,876 | 23,441 | 32,435 | 1,415 | 100.0 | 40.9 | 56.6 | 2.5 |
| 1990 | 46,773 | 45,043 | 21,175 | 23,868 | 1,730 | 100.0 | 45.3 | 51.0 | 3.7 |
| 1980 | 32,297 | 30,538 | 17,311 | 13,227 | 1,759 | 100.0 | 53.6 | 41.0 | 5.4 |
| 1974 | 29,190 | 27,348 | 16,828 | 10,520 | 1,842 | 100.0 | 57.6 | 36.0 | 6.3 |
| 1970 | 27,159 | 24,973 | 15,955 | 9,018 | 2,186 | 100.0 | 58.7 | 33.2 | 8.0 |
| 1960 | 20,051 | 17,250 | 11,137 | 6,113 | 2,801 | 100.0 | 55.5 | 30.5 | 14.0 |
| 1956 | 20,154 | 17,307 | 11,405 | 5,902 | 2,847 | 100.0 | 56.6 | 29.3 | 14.1 |
| 1950 | 18,937 | 15,954 | 10,624 | 5,330 | 2,983 | 100.0 | 56.1 | 28.1 | 15.8 |
| 1940 | 12,908 | 10,164 | 6,733 | 3,431 | 2,744 | 100.0 | 52.2 | 26.6 | 21.3 |
| 1930 | 10,055 | 7,809 | 5,032 | 2,777 | 2,246 | 100.0 | 50.0 | 27.6 | 22.3 |
| 1926 | 8,763 | 6,616 | 4,221 | 2,395 | 2,147 | 100.0 | 48.2 | 27.3 | 24.5 |
| 1920 | 8,058 | 6,185 | 3,777 | 2,408 | 1,873 | 100.0 | 46.9 | 29.9 | 23.2 |
| 1912 | 7,251 | 5,454 | 3,186 | 2,268 | 1,797 | 100.0 | 43.9 | 31.3 | 24.8 |
| 1908 | 6,780 | 4,925 | 3,018 | 1,907 | 1,855 | 100.0 | 44.5 | 28.1 | 27.4 |
| 1903 | 5,888 | 4,193 | 2,441 | 1,752 | 1,695 | 100.0 | 41.5 | 29.8 | 28.8 |
| 1901 | 5,563 | 3,960 | 2,342 | 1,618 | 1,603 | 100.0 | 42.1 | 29.1 | 28.8 |
| 1900 | 5,679 | 3,923 | 2,221 | 1,702 | 1,756 | 100.0 | 39.1 | 30.0 | 30.9 |
SOURCE: U.S. Bureau of the Census, Censuses of Population; ASG Department of Commerce