| | Welch, OK | Pryor Creek, OK | United States |
| Population | 626 | 9,439 | 329,725,481 |
| Female Population | 54.2% | 50.2% | 50.5% |
| Male Population | 45.9% | 49.9% | 49.5% |
| Median Age | 38.8 | 31.7 | 38.4 |
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| Population - 2010 | 620 | 9,546 | 309,327,143 |
| Population - 2000 | 597 | 8,659 | 285,036,114 |
| Population - 1990 | 499 | 8,327 | 251,960,433 |
| Pop. 2000 to Now | -2.2% | 8.5% | 15.6% |
| Pop. 1990 to Now | 17.0% | 12.8% | 30.8% |
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| Population Density | 1,429.2 | 953.1 | 93.4 |
| Land Area | 0.4 | 9.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Welch, OK | Pryor Creek, OK | United States |
| Age 0 to 4 | 4.5% | 6.9% | 5.9% |
| Age 5 to 9 | 9.7% | 8.4% | 6.1% |
| Age 10 to 14 | 9.3% | 6.8% | 6.6% |
| Age 15 to 17 | 7.3% | 3.9% | 3.9% |
| Age 18 to 20 | 2.9% | 5.3% | 4.0% |
| Age 21 to 24 | 2.7% | 6.3% | 5.2% |
| Age 25 to 34 | 10.1% | 16.1% | 13.8% |
| Age 35 to 44 | 10.9% | 9.9% | 12.9% |
| Age 45 to 54 | 13.3% | 9.7% | 12.6% |
| Age 55 to 59 | 4.8% | 4.1% | 6.7% |
| Age 60 to 64 | 3.2% | 6.3% | 6.3% |
| Age 65 to 74 | 4.0% | 8.7% | 9.6% |
| Age 75 to 84 | 12.8% | 4.8% | 4.5% |
| Age 85 and over | 4.6% | 2.7% | 1.9% |
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| Race | | | |
| | Welch, OK | Pryor Creek, OK | United States |
| White | 67.6% | 66.7% | 59.4% |
| Black | 1.3% | 0.5% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 14.1% | 15.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 8.1% | 10.0% | 3.2% |
| Hispanic | 8.9% | 6.4% | 18.4% |
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| Marriage & Family | | | |
| | Welch, OK | Pryor Creek, OK | United States |
| Married Population | 44.9% | 43.4% | 49.8% |
| Currently Married | 43.2% | 39.8% | 48.0% |
| Married but Separated | 1.7% | 3.6% | 1.8% |
| Single Population | 55.1% | 56.6% | 50.2% |
| Never Married | 26.3% | 32.9% | 33.8% |
| Divorced | 14.4% | 15.2% | 10.8% |
| Widowed | 14.4% | 8.6% | 5.6% |
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| Household Size | 2.59 | 2.45 | 2.60 |
| Households | 237 | 3,746 | 124,010,992 |
| Family Households | 138 | 2,443 | 80,755,759 |
| Married couple, w/children | 35.5% | 27.0% | 30.5% |
| Married couple, no children | 26.1% | 31.8% | 42.9% |
| Non Family Households | 99 | 1,303 | 43,255,233 |
| Single householder, w/children | 29.0% | 28.2% | 15.8% |
| Single householder, no children | 9.4% | 13.0% | 10.8% |