| | Genesee, WI | Port Washington, WI | United States |
| Population | 7,167 | 12,273 | 329,725,481 |
| Female Population | 49.5% | 52.3% | 50.5% |
| Male Population | 50.6% | 47.7% | 49.5% |
| Median Age | 46.6 | 39 | 38.4 |
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| Population - 2010 | 7,312 | 11,290 | 309,327,143 |
| Population - 2000 | 7,284 | 10,467 | 285,036,114 |
| Population - 1990 | 5,986 | 9,338 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 15.3% | 15.6% |
| Pop. 1990 to Now | 22.6% | 29.2% | 30.8% |
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| Population Density | 236.1 | 2,109.1 | 93.4 |
| Land Area | 30.4 | 5.8 | 3,531,905.4 |
| Water Area | 0.6 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Genesee, WI | Port Washington, WI | United States |
| Age 0 to 4 | 3.1% | 6.9% | 5.9% |
| Age 5 to 9 | 6.3% | 8.2% | 6.1% |
| Age 10 to 14 | 9.1% | 5.9% | 6.6% |
| Age 15 to 17 | 3.6% | 2.7% | 3.9% |
| Age 18 to 20 | 4.8% | 3.0% | 4.0% |
| Age 21 to 24 | 3.1% | 3.4% | 5.2% |
| Age 25 to 34 | 7.4% | 13.4% | 13.8% |
| Age 35 to 44 | 10.5% | 15.1% | 12.9% |
| Age 45 to 54 | 13.8% | 10.1% | 12.6% |
| Age 55 to 59 | 9.4% | 6.1% | 6.7% |
| Age 60 to 64 | 10.2% | 8.5% | 6.3% |
| Age 65 to 74 | 12.8% | 8.8% | 9.6% |
| Age 75 to 84 | 5.1% | 5.5% | 4.5% |
| Age 85 and over | 0.6% | 2.4% | 1.9% |
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| Race | | | |
| | Genesee, WI | Port Washington, WI | United States |
| White | 96.4% | 90.0% | 59.4% |
| Black | 0.4% | 1.7% | 12.2% |
| Asian | 0.7% | 1.8% | 5.6% |
| Native American | 0.0% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.6% | 3.6% | 3.2% |
| Hispanic | 1.7% | 2.2% | 18.4% |
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| Marriage & Family | | | |
| | Genesee, WI | Port Washington, WI | United States |
| Married Population | 70.7% | 56.0% | 49.8% |
| Currently Married | 70.3% | 55.0% | 48.0% |
| Married but Separated | 0.4% | 1.0% | 1.8% |
| Single Population | 29.3% | 44.0% | 50.2% |
| Never Married | 18.4% | 25.8% | 33.8% |
| Divorced | 8.9% | 13.5% | 10.8% |
| Widowed | 2.0% | 4.7% | 5.6% |
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| Household Size | 2.84 | 2.35 | 2.60 |
| Households | 2,519 | 5,107 | 124,010,992 |
| Family Households | 2,107 | 3,162 | 80,755,759 |
| Married couple, w/children | 35.9% | 32.7% | 30.5% |
| Married couple, no children | 54.7% | 47.7% | 42.9% |
| Non Family Households | 412 | 1,945 | 43,255,233 |
| Single householder, w/children | 3.8% | 13.1% | 15.8% |
| Single householder, no children | 5.6% | 6.5% | 10.8% |