| | Columbus Grove, OH | Yorkville, IL | United States |
| Population | 1,870 | 20,503 | 329,725,481 |
| Female Population | 50.0% | 48.8% | 50.5% |
| Male Population | 50.0% | 51.2% | 49.5% |
| Median Age | 35.1 | 34.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,151 | 17,055 | 309,327,143 |
| Population - 2000 | 2,200 | 6,189 | 285,036,114 |
| Population - 1990 | 2,231 | 3,925 | 251,960,433 |
| Pop. 2000 to Now | -6.3% | 241.9% | 15.6% |
| Pop. 1990 to Now | -7.6% | 439.1% | 30.8% |
| space4 | | | |
| Population Density | 1,529.0 | 1,025.6 | 93.4 |
| Land Area | 1.2 | 20.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Columbus Grove, OH | Yorkville, IL | United States |
| Age 0 to 4 | 7.8% | 5.4% | 5.9% |
| Age 5 to 9 | 10.3% | 11.5% | 6.1% |
| Age 10 to 14 | 6.0% | 7.2% | 6.6% |
| Age 15 to 17 | 4.7% | 3.2% | 3.9% |
| Age 18 to 20 | 1.3% | 3.7% | 4.0% |
| Age 21 to 24 | 6.6% | 3.0% | 5.2% |
| Age 25 to 34 | 13.4% | 17.1% | 13.8% |
| Age 35 to 44 | 11.4% | 20.5% | 12.9% |
| Age 45 to 54 | 13.0% | 10.8% | 12.6% |
| Age 55 to 59 | 2.9% | 3.9% | 6.7% |
| Age 60 to 64 | 4.0% | 5.7% | 6.3% |
| Age 65 to 74 | 12.1% | 5.4% | 9.6% |
| Age 75 to 84 | 5.3% | 1.9% | 4.5% |
| Age 85 and over | 1.3% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Columbus Grove, OH | Yorkville, IL | United States |
| White | 86.8% | 68.2% | 59.4% |
| Black | 1.7% | 10.1% | 12.2% |
| Asian | 0.0% | 3.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 5.1% | 0.0% | 0.4% |
| Two or More Races | 2.7% | 1.0% | 3.2% |
| Hispanic | 3.7% | 17.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Columbus Grove, OH | Yorkville, IL | United States |
| Married Population | 50.4% | 58.4% | 49.8% |
| Currently Married | 48.9% | 58.0% | 48.0% |
| Married but Separated | 1.5% | 0.4% | 1.8% |
| Single Population | 49.6% | 41.6% | 50.2% |
| Never Married | 25.9% | 31.0% | 33.8% |
| Divorced | 16.7% | 7.9% | 10.8% |
| Widowed | 7.0% | 2.7% | 5.6% |
| space5 | | | |
| Household Size | 2.47 | 2.88 | 2.60 |
| Households | 757 | 7,035 | 124,010,992 |
| Family Households | 462 | 5,427 | 80,755,759 |
| Married couple, w/children | 39.4% | 44.6% | 30.5% |
| Married couple, no children | 36.1% | 37.1% | 42.9% |
| Non Family Households | 295 | 1,608 | 43,255,233 |
| Single householder, w/children | 15.2% | 14.0% | 15.8% |
| Single householder, no children | 9.3% | 4.3% | 10.8% |