| | Mill Creek, OK | Lone Grove, OK | United States |
| Population | 268 | 4,987 | 329,725,481 |
| Female Population | 57.8% | 47.2% | 50.5% |
| Male Population | 42.2% | 52.8% | 49.5% |
| Median Age | 50.2 | 35.6 | 38.4 |
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| Population - 2010 | 320 | 4,852 | 309,327,143 |
| Population - 2000 | 340 | 4,631 | 285,036,114 |
| Population - 1990 | 336 | 4,114 | 251,960,433 |
| Pop. 2000 to Now | -8.5% | 12.1% | 15.6% |
| Pop. 1990 to Now | -7.4% | 26.2% | 30.8% |
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| Population Density | 716.6 | 200.5 | 93.4 |
| Land Area | 0.4 | 24.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Mill Creek, OK | Lone Grove, OK | United States |
| Age 0 to 4 | 4.9% | 5.0% | 5.9% |
| Age 5 to 9 | 8.2% | 7.5% | 6.1% |
| Age 10 to 14 | 5.6% | 11.1% | 6.6% |
| Age 15 to 17 | 1.5% | 2.8% | 3.9% |
| Age 18 to 20 | 4.1% | 3.1% | 4.0% |
| Age 21 to 24 | 1.9% | 6.6% | 5.2% |
| Age 25 to 34 | 11.2% | 13.1% | 13.8% |
| Age 35 to 44 | 4.9% | 12.4% | 12.9% |
| Age 45 to 54 | 14.6% | 11.6% | 12.6% |
| Age 55 to 59 | 11.6% | 7.8% | 6.7% |
| Age 60 to 64 | 6.0% | 7.6% | 6.3% |
| Age 65 to 74 | 7.8% | 7.5% | 9.6% |
| Age 75 to 84 | 17.5% | 3.3% | 4.5% |
| Age 85 and over | 0.4% | 0.6% | 1.9% |
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| Race | | | |
| | Mill Creek, OK | Lone Grove, OK | United States |
| White | 70.9% | 71.7% | 59.4% |
| Black | 0.0% | 2.9% | 12.2% |
| Asian | 0.0% | 0.7% | 5.6% |
| Native American | 10.8% | 10.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 14.9% | 10.5% | 3.2% |
| Hispanic | 3.4% | 3.9% | 18.4% |
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| Marriage & Family | | | |
| | Mill Creek, OK | Lone Grove, OK | United States |
| Married Population | 50.0% | 52.6% | 49.8% |
| Currently Married | 50.0% | 48.4% | 48.0% |
| Married but Separated | 0.0% | 4.2% | 1.8% |
| Single Population | 50.0% | 47.4% | 50.2% |
| Never Married | 22.5% | 26.9% | 33.8% |
| Divorced | 19.3% | 16.4% | 10.8% |
| Widowed | 8.3% | 4.2% | 5.6% |
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| Household Size | 3.31 | 2.72 | 2.60 |
| Households | 81 | 1,831 | 124,010,992 |
| Family Households | 49 | 1,249 | 80,755,759 |
| Married couple, w/children | 20.4% | 31.9% | 30.5% |
| Married couple, no children | 38.8% | 37.0% | 42.9% |
| Non Family Households | 32 | 582 | 43,255,233 |
| Single householder, w/children | 22.4% | 23.9% | 15.8% |
| Single householder, no children | 18.4% | 7.2% | 10.8% |