| | Sullivan, IL | Pana, IL | United States |
| Population | 4,532 | 5,304 | 329,725,481 |
| Female Population | 53.0% | 52.0% | 50.5% |
| Male Population | 47.0% | 48.0% | 49.5% |
| Median Age | 38.4 | 41.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,453 | 5,839 | 309,327,143 |
| Population - 2000 | 4,326 | 5,614 | 285,036,114 |
| Population - 1990 | 4,354 | 5,796 | 251,960,433 |
| Pop. 2000 to Now | 1.7% | -5.1% | 15.6% |
| Pop. 1990 to Now | 1.1% | -8.1% | 30.8% |
| space4 | | | |
| Population Density | 1,667.4 | 1,386.7 | 93.4 |
| Land Area | 2.7 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sullivan, IL | Pana, IL | United States |
| Age 0 to 4 | 6.0% | 5.6% | 5.9% |
| Age 5 to 9 | 6.4% | 8.6% | 6.1% |
| Age 10 to 14 | 9.8% | 7.4% | 6.6% |
| Age 15 to 17 | 4.3% | 2.8% | 3.9% |
| Age 18 to 20 | 3.3% | 2.8% | 4.0% |
| Age 21 to 24 | 3.2% | 3.8% | 5.2% |
| Age 25 to 34 | 12.6% | 11.1% | 13.8% |
| Age 35 to 44 | 12.8% | 9.4% | 12.9% |
| Age 45 to 54 | 12.0% | 9.4% | 12.6% |
| Age 55 to 59 | 7.0% | 10.6% | 6.7% |
| Age 60 to 64 | 4.6% | 5.1% | 6.3% |
| Age 65 to 74 | 9.9% | 11.8% | 9.6% |
| Age 75 to 84 | 5.7% | 9.3% | 4.5% |
| Age 85 and over | 2.4% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sullivan, IL | Pana, IL | United States |
| White | 95.4% | 97.2% | 59.4% |
| Black | 2.0% | 0.0% | 12.2% |
| Asian | 0.3% | 1.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 1.2% | 3.2% |
| Hispanic | 1.4% | 0.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sullivan, IL | Pana, IL | United States |
| Married Population | 52.4% | 48.5% | 49.8% |
| Currently Married | 50.0% | 44.7% | 48.0% |
| Married but Separated | 2.4% | 3.8% | 1.8% |
| Single Population | 47.6% | 51.5% | 50.2% |
| Never Married | 23.2% | 26.1% | 33.8% |
| Divorced | 14.8% | 16.5% | 10.8% |
| Widowed | 9.6% | 8.9% | 5.6% |
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| Household Size | 2.46 | 2.32 | 2.60 |
| Households | 1,760 | 2,238 | 124,010,992 |
| Family Households | 1,196 | 1,212 | 80,755,759 |
| Married couple, w/children | 22.4% | 19.9% | 30.5% |
| Married couple, no children | 48.1% | 51.5% | 42.9% |
| Non Family Households | 564 | 1,026 | 43,255,233 |
| Single householder, w/children | 23.2% | 25.7% | 15.8% |
| Single householder, no children | 6.3% | 2.9% | 10.8% |