| | Onamia, MN | Okemah, OK | United States |
| Population | 871 | 3,113 | 329,725,481 |
| Female Population | 51.9% | 49.9% | 50.5% |
| Male Population | 48.1% | 50.2% | 49.5% |
| Median Age | 44.2 | 35 | 38.4 |
| space3 | | | |
| Population - 2010 | 881 | 3,225 | 309,327,143 |
| Population - 2000 | 847 | 3,038 | 285,036,114 |
| Population - 1990 | 676 | 3,085 | 251,960,433 |
| Pop. 2000 to Now | 1.3% | 0.3% | 15.6% |
| Pop. 1990 to Now | 26.9% | -1.2% | 30.8% |
| space4 | | | |
| Population Density | 917.8 | 1,231.4 | 93.4 |
| Land Area | 0.9 | 2.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Onamia, MN | Okemah, OK | United States |
| Age 0 to 4 | 6.2% | 6.8% | 5.9% |
| Age 5 to 9 | 8.0% | 10.1% | 6.1% |
| Age 10 to 14 | 6.2% | 6.7% | 6.6% |
| Age 15 to 17 | 8.7% | 4.2% | 3.9% |
| Age 18 to 20 | 2.0% | 2.9% | 4.0% |
| Age 21 to 24 | 3.0% | 4.7% | 5.2% |
| Age 25 to 34 | 9.2% | 14.5% | 13.8% |
| Age 35 to 44 | 7.5% | 12.4% | 12.9% |
| Age 45 to 54 | 10.1% | 11.3% | 12.6% |
| Age 55 to 59 | 6.5% | 6.0% | 6.7% |
| Age 60 to 64 | 6.3% | 4.7% | 6.3% |
| Age 65 to 74 | 9.2% | 7.6% | 9.6% |
| Age 75 to 84 | 10.2% | 6.0% | 4.5% |
| Age 85 and over | 6.9% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Onamia, MN | Okemah, OK | United States |
| White | 71.2% | 60.0% | 59.4% |
| Black | 4.1% | 1.4% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 11.6% | 18.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 10.3% | 14.0% | 3.2% |
| Hispanic | 2.2% | 6.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Onamia, MN | Okemah, OK | United States |
| Married Population | 30.4% | 43.1% | 49.8% |
| Currently Married | 29.4% | 38.4% | 48.0% |
| Married but Separated | 1.0% | 4.7% | 1.8% |
| Single Population | 69.6% | 56.9% | 50.2% |
| Never Married | 37.2% | 30.0% | 33.8% |
| Divorced | 17.3% | 17.1% | 10.8% |
| Widowed | 15.0% | 9.8% | 5.6% |
| space5 | | | |
| Household Size | 2.05 | 2.74 | 2.60 |
| Households | 349 | 1,078 | 124,010,992 |
| Family Households | 169 | 744 | 80,755,759 |
| Married couple, w/children | 6.5% | 17.6% | 30.5% |
| Married couple, no children | 46.2% | 34.3% | 42.9% |
| Non Family Households | 180 | 334 | 43,255,233 |
| Single householder, w/children | 39.1% | 32.8% | 15.8% |
| Single householder, no children | 8.3% | 15.3% | 10.8% |