| | Hennessey, OK | Waukomis, OK | United States |
| Population | 2,680 | 1,227 | 329,725,481 |
| Female Population | 46.1% | 52.8% | 50.5% |
| Male Population | 54.0% | 47.2% | 49.5% |
| Median Age | 37.2 | 46.6 | 38.4 |
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| Population - 2010 | 2,138 | 1,290 | 309,327,143 |
| Population - 2000 | 2,058 | 1,261 | 285,036,114 |
| Population - 1990 | 1,902 | 1,322 | 251,960,433 |
| Pop. 2000 to Now | 8.1% | 2.3% | 15.6% |
| Pop. 1990 to Now | 17.0% | -2.4% | 30.8% |
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| Population Density | 723.0 | 372.4 | 93.4 |
| Land Area | 3.7 | 3.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hennessey, OK | Waukomis, OK | United States |
| Age 0 to 4 | 7.0% | 3.8% | 5.9% |
| Age 5 to 9 | 7.1% | 4.8% | 6.1% |
| Age 10 to 14 | 9.8% | 4.0% | 6.6% |
| Age 15 to 17 | 4.2% | 1.8% | 3.9% |
| Age 18 to 20 | 4.2% | 4.6% | 4.0% |
| Age 21 to 24 | 8.8% | 6.5% | 5.2% |
| Age 25 to 34 | 7.4% | 9.6% | 13.8% |
| Age 35 to 44 | 16.2% | 11.9% | 12.9% |
| Age 45 to 54 | 5.0% | 12.9% | 12.6% |
| Age 55 to 59 | 6.5% | 5.9% | 6.7% |
| Age 60 to 64 | 11.8% | 6.1% | 6.3% |
| Age 65 to 74 | 7.2% | 23.7% | 9.6% |
| Age 75 to 84 | 2.4% | 4.0% | 4.5% |
| Age 85 and over | 2.4% | 0.3% | 1.9% |
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| Race | | | |
| | Hennessey, OK | Waukomis, OK | United States |
| White | 68.3% | 95.5% | 59.4% |
| Black | 0.3% | 0.0% | 12.2% |
| Asian | 0.5% | 0.0% | 5.6% |
| Native American | 0.9% | 2.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.3% | 0.4% | 3.2% |
| Hispanic | 24.7% | 2.1% | 18.4% |
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| Marriage & Family | | | |
| | Hennessey, OK | Waukomis, OK | United States |
| Married Population | 55.5% | 60.4% | 49.8% |
| Currently Married | 48.3% | 59.5% | 48.0% |
| Married but Separated | 7.2% | 0.9% | 1.8% |
| Single Population | 44.5% | 39.6% | 50.2% |
| Never Married | 28.2% | 18.3% | 33.8% |
| Divorced | 7.7% | 10.4% | 10.8% |
| Widowed | 8.7% | 10.8% | 5.6% |
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| Household Size | 2.75 | 2.49 | 2.60 |
| Households | 964 | 493 | 124,010,992 |
| Family Households | 653 | 315 | 80,755,759 |
| Married couple, w/children | 31.2% | 27.6% | 30.5% |
| Married couple, no children | 37.2% | 53.0% | 42.9% |
| Non Family Households | 311 | 178 | 43,255,233 |
| Single householder, w/children | 24.5% | 6.7% | 15.8% |
| Single householder, no children | 7.0% | 12.7% | 10.8% |