| | Oak Creek, WI | Franklin Park, PA | United States |
| Population | 36,266 | 15,239 | 329,725,481 |
| Female Population | 49.0% | 49.5% | 50.5% |
| Male Population | 51.0% | 50.5% | 49.5% |
| Median Age | 39.2 | 41.4 | 38.4 |
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| Population - 2010 | 34,491 | 13,544 | 309,327,143 |
| Population - 2000 | 28,456 | 11,364 | 285,036,114 |
| Population - 1990 | 19,513 | 10,109 | 251,960,433 |
| Pop. 2000 to Now | 28.2% | 31.0% | 15.6% |
| Pop. 1990 to Now | 86.9% | 47.2% | 30.8% |
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| Population Density | 1,274.8 | 1,126.9 | 93.4 |
| Land Area | 28.4 | 13.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Oak Creek, WI | Franklin Park, PA | United States |
| Age 0 to 4 | 5.0% | 5.9% | 5.9% |
| Age 5 to 9 | 6.0% | 7.6% | 6.1% |
| Age 10 to 14 | 6.8% | 9.4% | 6.6% |
| Age 15 to 17 | 4.0% | 4.7% | 3.9% |
| Age 18 to 20 | 2.2% | 1.5% | 4.0% |
| Age 21 to 24 | 3.2% | 2.8% | 5.2% |
| Age 25 to 34 | 16.6% | 10.9% | 13.8% |
| Age 35 to 44 | 12.9% | 12.9% | 12.9% |
| Age 45 to 54 | 13.5% | 14.9% | 12.6% |
| Age 55 to 59 | 9.2% | 7.4% | 6.7% |
| Age 60 to 64 | 7.8% | 7.9% | 6.3% |
| Age 65 to 74 | 8.6% | 9.2% | 9.6% |
| Age 75 to 84 | 2.9% | 3.8% | 4.5% |
| Age 85 and over | 1.3% | 1.0% | 1.9% |
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| Race | | | |
| | Oak Creek, WI | Franklin Park, PA | United States |
| White | 75.4% | 78.4% | 59.4% |
| Black | 3.5% | 3.5% | 12.2% |
| Asian | 7.0% | 13.8% | 5.6% |
| Native American | 0.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.1% | 0.4% |
| Two or More Races | 3.1% | 1.8% | 3.2% |
| Hispanic | 10.6% | 2.3% | 18.4% |
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| Marriage & Family | | | |
| | Oak Creek, WI | Franklin Park, PA | United States |
| Married Population | 52.4% | 71.1% | 49.8% |
| Currently Married | 51.4% | 70.0% | 48.0% |
| Married but Separated | 0.9% | 1.1% | 1.8% |
| Single Population | 47.6% | 28.9% | 50.2% |
| Never Married | 31.3% | 20.4% | 33.8% |
| Divorced | 11.6% | 5.5% | 10.8% |
| Widowed | 4.8% | 2.9% | 5.6% |
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| Household Size | 2.37 | 2.80 | 2.60 |
| Households | 15,262 | 5,445 | 124,010,992 |
| Family Households | 9,275 | 4,420 | 80,755,759 |
| Married couple, w/children | 32.6% | 45.4% | 30.5% |
| Married couple, no children | 45.1% | 44.7% | 42.9% |
| Non Family Households | 5,987 | 1,025 | 43,255,233 |
| Single householder, w/children | 12.8% | 5.2% | 15.8% |
| Single householder, no children | 9.6% | 4.6% | 10.8% |