| | Helvetia, WI | Clintonville, WI | United States |
| Population | 655 | 4,568 | 329,725,481 |
| Female Population | 44.3% | 52.9% | 50.5% |
| Male Population | 55.7% | 47.1% | 49.5% |
| Median Age | 47.5 | 38.9 | 38.4 |
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| Population - 2010 | 634 | 4,562 | 309,327,143 |
| Population - 2000 | 649 | 4,736 | 285,036,114 |
| Population - 1990 | 587 | 4,351 | 251,960,433 |
| Pop. 2000 to Now | -4.3% | -8.1% | 15.6% |
| Pop. 1990 to Now | 5.8% | 0.1% | 30.8% |
| space4 | | | |
| Population Density | 18.3 | 1,027.4 | 93.4 |
| Land Area | 35.8 | 4.4 | 3,531,905.4 |
| Water Area | 0.4 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Helvetia, WI | Clintonville, WI | United States |
| Age 0 to 4 | 3.8% | 7.4% | 5.9% |
| Age 5 to 9 | 5.6% | 2.7% | 6.1% |
| Age 10 to 14 | 7.2% | 4.5% | 6.6% |
| Age 15 to 17 | 2.6% | 4.6% | 3.9% |
| Age 18 to 20 | 2.1% | 2.8% | 4.0% |
| Age 21 to 24 | 2.4% | 6.9% | 5.2% |
| Age 25 to 34 | 8.4% | 16.7% | 13.8% |
| Age 35 to 44 | 13.7% | 9.2% | 12.9% |
| Age 45 to 54 | 12.2% | 12.3% | 12.6% |
| Age 55 to 59 | 9.0% | 6.0% | 6.7% |
| Age 60 to 64 | 9.6% | 9.1% | 6.3% |
| Age 65 to 74 | 13.3% | 7.9% | 9.6% |
| Age 75 to 84 | 7.3% | 5.7% | 4.5% |
| Age 85 and over | 2.6% | 4.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Helvetia, WI | Clintonville, WI | United States |
| White | 98.0% | 92.8% | 59.4% |
| Black | 0.5% | 0.0% | 12.2% |
| Asian | 1.5% | 0.0% | 5.6% |
| Native American | 0.0% | 2.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 0.5% | 3.2% |
| Hispanic | 0.0% | 4.2% | 18.4% |
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| Marriage & Family | | | |
| | Helvetia, WI | Clintonville, WI | United States |
| Married Population | 56.2% | 45.1% | 49.8% |
| Currently Married | 55.5% | 43.5% | 48.0% |
| Married but Separated | 0.7% | 1.6% | 1.8% |
| Single Population | 43.8% | 54.9% | 50.2% |
| Never Married | 23.4% | 30.9% | 33.8% |
| Divorced | 13.7% | 16.3% | 10.8% |
| Widowed | 6.6% | 7.7% | 5.6% |
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| Household Size | 2.26 | 2.18 | 2.60 |
| Households | 290 | 2,067 | 124,010,992 |
| Family Households | 176 | 1,197 | 80,755,759 |
| Married couple, w/children | 22.7% | 18.2% | 30.5% |
| Married couple, no children | 58.5% | 46.1% | 42.9% |
| Non Family Households | 114 | 870 | 43,255,233 |
| Single householder, w/children | 12.5% | 22.6% | 15.8% |
| Single householder, no children | 6.3% | 13.0% | 10.8% |