| | Green, OH | Greensburg, IN | United States |
| Population | 27,267 | 11,573 | 329,725,481 |
| Female Population | 49.9% | 49.9% | 50.5% |
| Male Population | 50.1% | 50.2% | 49.5% |
| Median Age | 41.5 | 39.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 25,746 | 11,540 | 309,327,143 |
| Population - 2000 | 22,817 | 10,260 | 285,036,114 |
| Population - 1990 | 19,254 | 9,286 | 251,960,433 |
| Pop. 2000 to Now | 12.5% | 16.8% | 15.6% |
| Pop. 1990 to Now | 33.4% | 29.1% | 30.8% |
| space4 | | | |
| Population Density | 850.7 | 1,248.7 | 93.4 |
| Land Area | 32.1 | 9.3 | 3,531,905.4 |
| Water Area | 1.5 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Green, OH | Greensburg, IN | United States |
| Age 0 to 4 | 4.8% | 6.4% | 5.9% |
| Age 5 to 9 | 6.2% | 5.1% | 6.1% |
| Age 10 to 14 | 9.9% | 7.0% | 6.6% |
| Age 15 to 17 | 3.9% | 2.7% | 3.9% |
| Age 18 to 20 | 3.0% | 3.8% | 4.0% |
| Age 21 to 24 | 3.8% | 7.3% | 5.2% |
| Age 25 to 34 | 11.3% | 13.1% | 13.8% |
| Age 35 to 44 | 12.3% | 11.6% | 12.9% |
| Age 45 to 54 | 12.5% | 12.4% | 12.6% |
| Age 55 to 59 | 7.0% | 8.3% | 6.7% |
| Age 60 to 64 | 7.3% | 4.9% | 6.3% |
| Age 65 to 74 | 11.1% | 9.7% | 9.6% |
| Age 75 to 84 | 4.4% | 5.5% | 4.5% |
| Age 85 and over | 2.5% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Green, OH | Greensburg, IN | United States |
| White | 92.8% | 89.7% | 59.4% |
| Black | 1.4% | 0.3% | 12.2% |
| Asian | 1.6% | 2.6% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.9% | 0.4% |
| Two or More Races | 2.6% | 2.1% | 3.2% |
| Hispanic | 0.8% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Green, OH | Greensburg, IN | United States |
| Married Population | 58.4% | 46.4% | 49.8% |
| Currently Married | 57.7% | 45.7% | 48.0% |
| Married but Separated | 0.8% | 0.7% | 1.8% |
| Single Population | 41.6% | 53.6% | 50.2% |
| Never Married | 24.7% | 31.2% | 33.8% |
| Divorced | 10.6% | 14.2% | 10.8% |
| Widowed | 6.4% | 8.2% | 5.6% |
| space5 | | | |
| Household Size | 2.53 | 2.31 | 2.60 |
| Households | 10,685 | 4,858 | 124,010,992 |
| Family Households | 7,267 | 2,692 | 80,755,759 |
| Married couple, w/children | 33.2% | 36.1% | 30.5% |
| Married couple, no children | 48.7% | 40.7% | 42.9% |
| Non Family Households | 3,418 | 2,166 | 43,255,233 |
| Single householder, w/children | 10.8% | 10.4% | 15.8% |
| Single householder, no children | 7.4% | 12.8% | 10.8% |