| | Greenup, IL | Clinton, IN | United States |
| Population | 2,013 | 4,803 | 329,725,481 |
| Female Population | 55.3% | 51.7% | 50.5% |
| Male Population | 44.7% | 48.3% | 49.5% |
| Median Age | 36 | 41.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,532 | 4,832 | 309,327,143 |
| Population - 2000 | 1,532 | 5,126 | 285,036,114 |
| Population - 1990 | 1,616 | 5,040 | 251,960,433 |
| Pop. 2000 to Now | -3.8% | -9.9% | 15.6% |
| Pop. 1990 to Now | -8.8% | -8.4% | 30.8% |
| space4 | | | |
| Population Density | 1,150.3 | 2,132.8 | 93.4 |
| Land Area | 1.8 | 2.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Greenup, IL | Clinton, IN | United States |
| Age 0 to 4 | 7.0% | 6.1% | 5.9% |
| Age 5 to 9 | 7.5% | 9.0% | 6.1% |
| Age 10 to 14 | 8.0% | 4.3% | 6.6% |
| Age 15 to 17 | 3.6% | 3.1% | 3.9% |
| Age 18 to 20 | 3.3% | 2.5% | 4.0% |
| Age 21 to 24 | 5.0% | 4.7% | 5.2% |
| Age 25 to 34 | 10.8% | 11.5% | 13.8% |
| Age 35 to 44 | 15.7% | 13.8% | 12.9% |
| Age 45 to 54 | 11.2% | 9.4% | 12.6% |
| Age 55 to 59 | 5.1% | 8.3% | 6.7% |
| Age 60 to 64 | 3.2% | 4.3% | 6.3% |
| Age 65 to 74 | 8.0% | 13.3% | 9.6% |
| Age 75 to 84 | 5.9% | 6.6% | 4.5% |
| Age 85 and over | 5.7% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Greenup, IL | Clinton, IN | United States |
| White | 98.0% | 98.5% | 59.4% |
| Black | 0.4% | 1.2% | 12.2% |
| Asian | 0.4% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 0.2% | 3.2% |
| Hispanic | 0.0% | 0.1% | 18.4% |
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| Marriage & Family | | | |
| | Greenup, IL | Clinton, IN | United States |
| Married Population | 52.9% | 46.5% | 49.8% |
| Currently Married | 51.7% | 46.0% | 48.0% |
| Married but Separated | 1.3% | 0.5% | 1.8% |
| Single Population | 47.1% | 53.5% | 50.2% |
| Never Married | 22.8% | 26.8% | 33.8% |
| Divorced | 13.3% | 21.2% | 10.8% |
| Widowed | 11.0% | 5.5% | 5.6% |
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| Household Size | 2.51 | 2.25 | 2.60 |
| Households | 786 | 2,054 | 124,010,992 |
| Family Households | 459 | 1,382 | 80,755,759 |
| Married couple, w/children | 45.3% | 14.6% | 30.5% |
| Married couple, no children | 41.6% | 45.3% | 42.9% |
| Non Family Households | 327 | 672 | 43,255,233 |
| Single householder, w/children | 8.3% | 31.9% | 15.8% |
| Single householder, no children | 4.8% | 8.2% | 10.8% |