| | Monticello, IN | Cedarburg, WI | United States |
| Population | 5,508 | 12,109 | 329,725,481 |
| Female Population | 52.7% | 51.3% | 50.5% |
| Male Population | 47.3% | 48.7% | 49.5% |
| Median Age | 45.3 | 44.5 | 38.4 |
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| Population - 2010 | 5,393 | 11,441 | 309,327,143 |
| Population - 2000 | 5,723 | 10,908 | 285,036,114 |
| Population - 1990 | 5,237 | 9,895 | 251,960,433 |
| Pop. 2000 to Now | -8.3% | 8.0% | 15.6% |
| Pop. 1990 to Now | 0.2% | 19.1% | 30.8% |
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| Population Density | 1,591.0 | 2,506.0 | 93.4 |
| Land Area | 3.5 | 4.8 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Monticello, IN | Cedarburg, WI | United States |
| Age 0 to 4 | 5.3% | 4.2% | 5.9% |
| Age 5 to 9 | 5.3% | 5.5% | 6.1% |
| Age 10 to 14 | 4.8% | 7.4% | 6.6% |
| Age 15 to 17 | 2.9% | 4.6% | 3.9% |
| Age 18 to 20 | 2.6% | 3.9% | 4.0% |
| Age 21 to 24 | 6.4% | 4.9% | 5.2% |
| Age 25 to 34 | 12.2% | 9.6% | 13.8% |
| Age 35 to 44 | 10.0% | 11.0% | 12.9% |
| Age 45 to 54 | 11.9% | 14.1% | 12.6% |
| Age 55 to 59 | 3.7% | 7.9% | 6.7% |
| Age 60 to 64 | 8.4% | 7.7% | 6.3% |
| Age 65 to 74 | 12.9% | 9.1% | 9.6% |
| Age 75 to 84 | 5.7% | 6.6% | 4.5% |
| Age 85 and over | 7.7% | 3.6% | 1.9% |
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| Race | | | |
| | Monticello, IN | Cedarburg, WI | United States |
| White | 85.7% | 92.0% | 59.4% |
| Black | 0.3% | 0.7% | 12.2% |
| Asian | 0.0% | 1.4% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 2.4% | 3.2% |
| Hispanic | 13.9% | 3.5% | 18.4% |
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| Marriage & Family | | | |
| | Monticello, IN | Cedarburg, WI | United States |
| Married Population | 39.9% | 58.3% | 49.8% |
| Currently Married | 38.2% | 57.0% | 48.0% |
| Married but Separated | 1.8% | 1.3% | 1.8% |
| Single Population | 60.1% | 41.7% | 50.2% |
| Never Married | 30.8% | 26.5% | 33.8% |
| Divorced | 15.4% | 8.1% | 10.8% |
| Widowed | 13.9% | 7.2% | 5.6% |
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| Household Size | 2.15 | 2.33 | 2.60 |
| Households | 2,460 | 5,117 | 124,010,992 |
| Family Households | 1,377 | 3,318 | 80,755,759 |
| Married couple, w/children | 22.7% | 35.8% | 30.5% |
| Married couple, no children | 38.1% | 52.0% | 42.9% |
| Non Family Households | 1,083 | 1,799 | 43,255,233 |
| Single householder, w/children | 20.2% | 8.3% | 15.8% |
| Single householder, no children | 19.0% | 3.9% | 10.8% |