| | Armstrong, OK | Calera, OK | United States |
| Population | 101 | 2,815 | 329,725,481 |
| Female Population | 44.6% | 55.3% | 50.5% |
| Male Population | 55.5% | 44.7% | 49.5% |
| Median Age | 40.3 | 30.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 99 | 2,172 | 309,327,143 |
| Population - 2000 | 141 | 1,739 | 285,036,114 |
| Population - 1990 | 122 | 1,536 | 251,960,433 |
| Pop. 2000 to Now | -21.3% | 38.8% | 15.6% |
| Pop. 1990 to Now | -9.0% | 57.2% | 30.8% |
| space4 | | | |
| Population Density | 1,134.8 | 583.3 | 93.4 |
| Land Area | 0.1 | 4.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Armstrong, OK | Calera, OK | United States |
| Age 0 to 4 | 7.9% | 10.5% | 5.9% |
| Age 5 to 9 | 0.0% | 7.6% | 6.1% |
| Age 10 to 14 | 13.9% | 6.6% | 6.6% |
| Age 15 to 17 | 5.0% | 2.7% | 3.9% |
| Age 18 to 20 | 0.0% | 3.9% | 4.0% |
| Age 21 to 24 | 4.0% | 6.3% | 5.2% |
| Age 25 to 34 | 8.9% | 21.0% | 13.8% |
| Age 35 to 44 | 14.9% | 8.1% | 12.9% |
| Age 45 to 54 | 8.9% | 9.8% | 12.6% |
| Age 55 to 59 | 7.9% | 5.3% | 6.7% |
| Age 60 to 64 | 11.9% | 6.6% | 6.3% |
| Age 65 to 74 | 6.9% | 7.7% | 9.6% |
| Age 75 to 84 | 7.9% | 3.0% | 4.5% |
| Age 85 and over | 2.0% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Armstrong, OK | Calera, OK | United States |
| White | 60.4% | 63.7% | 59.4% |
| Black | 0.0% | 1.0% | 12.2% |
| Asian | 0.0% | 0.8% | 5.6% |
| Native American | 16.8% | 15.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 9.9% | 12.3% | 3.2% |
| Hispanic | 12.9% | 7.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Armstrong, OK | Calera, OK | United States |
| Married Population | 58.2% | 48.8% | 49.8% |
| Currently Married | 58.2% | 41.8% | 48.0% |
| Married but Separated | 0.0% | 7.0% | 1.8% |
| Single Population | 41.8% | 51.2% | 50.2% |
| Never Married | 27.8% | 27.9% | 33.8% |
| Divorced | 11.4% | 18.5% | 10.8% |
| Widowed | 2.5% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 2.73 | 2.53 | 2.60 |
| Households | 37 | 1,101 | 124,010,992 |
| Family Households | 28 | 732 | 80,755,759 |
| Married couple, w/children | 25.0% | 30.1% | 30.5% |
| Married couple, no children | 46.4% | 25.0% | 42.9% |
| Non Family Households | 9 | 369 | 43,255,233 |
| Single householder, w/children | 10.7% | 34.4% | 15.8% |
| Single householder, no children | 17.9% | 10.5% | 10.8% |