| | Omro, WI | Sheridan, IN | United States |
| Population | 3,639 | 3,486 | 329,725,481 |
| Female Population | 51.1% | 50.3% | 50.5% |
| Male Population | 48.9% | 49.7% | 49.5% |
| Median Age | 39.4 | 36 | 38.4 |
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| Population - 2010 | 3,525 | 2,707 | 309,327,143 |
| Population - 2000 | 3,177 | 2,520 | 285,036,114 |
| Population - 1990 | 2,836 | 2,046 | 251,960,433 |
| Pop. 2000 to Now | 13.1% | 21.0% | 15.6% |
| Pop. 1990 to Now | 26.7% | 49.0% | 30.8% |
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| Population Density | 1,495.7 | 1,616.1 | 93.4 |
| Land Area | 2.4 | 2.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Omro, WI | Sheridan, IN | United States |
| Age 0 to 4 | 3.7% | 6.7% | 5.9% |
| Age 5 to 9 | 8.7% | 7.3% | 6.1% |
| Age 10 to 14 | 8.1% | 6.8% | 6.6% |
| Age 15 to 17 | 3.1% | 3.9% | 3.9% |
| Age 18 to 20 | 4.6% | 6.0% | 4.0% |
| Age 21 to 24 | 3.6% | 4.1% | 5.2% |
| Age 25 to 34 | 7.6% | 14.0% | 13.8% |
| Age 35 to 44 | 14.9% | 16.5% | 12.9% |
| Age 45 to 54 | 13.5% | 10.5% | 12.6% |
| Age 55 to 59 | 7.4% | 3.8% | 6.7% |
| Age 60 to 64 | 5.5% | 3.7% | 6.3% |
| Age 65 to 74 | 13.6% | 12.8% | 9.6% |
| Age 75 to 84 | 4.1% | 2.1% | 4.5% |
| Age 85 and over | 1.6% | 1.7% | 1.9% |
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| Race | | | |
| | Omro, WI | Sheridan, IN | United States |
| White | 94.1% | 92.5% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 3.4% | 3.2% |
| Hispanic | 5.2% | 3.6% | 18.4% |
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| Marriage & Family | | | |
| | Omro, WI | Sheridan, IN | United States |
| Married Population | 55.8% | 48.6% | 49.8% |
| Currently Married | 55.3% | 45.2% | 48.0% |
| Married but Separated | 0.5% | 3.4% | 1.8% |
| Single Population | 44.2% | 51.4% | 50.2% |
| Never Married | 26.3% | 33.4% | 33.8% |
| Divorced | 13.1% | 14.5% | 10.8% |
| Widowed | 4.8% | 3.4% | 5.6% |
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| Household Size | 2.25 | 2.61 | 2.60 |
| Households | 1,605 | 1,331 | 124,010,992 |
| Family Households | 1,085 | 893 | 80,755,759 |
| Married couple, w/children | 30.7% | 30.8% | 30.5% |
| Married couple, no children | 42.2% | 38.2% | 42.9% |
| Non Family Households | 520 | 438 | 43,255,233 |
| Single householder, w/children | 10.4% | 19.8% | 15.8% |
| Single householder, no children | 16.7% | 11.2% | 10.8% |