| | North Vernon, IN | Portage, IN | United States |
| Population | 6,836 | 37,540 | 329,725,481 |
| Female Population | 46.8% | 51.5% | 50.5% |
| Male Population | 53.3% | 48.6% | 49.5% |
| Median Age | 37.3 | 37.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,955 | 36,853 | 309,327,143 |
| Population - 2000 | 6,515 | 33,496 | 285,036,114 |
| Population - 1990 | 5,311 | 29,060 | 251,960,433 |
| Pop. 2000 to Now | 1.7% | 10.9% | 15.6% |
| Pop. 1990 to Now | 24.8% | 27.8% | 30.8% |
| space4 | | | |
| Population Density | 873.8 | 1,470.0 | 93.4 |
| Land Area | 7.8 | 25.5 | 3,531,905.4 |
| Water Area | 0.0 | 2.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | North Vernon, IN | Portage, IN | United States |
| Age 0 to 4 | 7.2% | 5.6% | 5.9% |
| Age 5 to 9 | 6.6% | 6.2% | 6.1% |
| Age 10 to 14 | 5.0% | 7.2% | 6.6% |
| Age 15 to 17 | 4.5% | 3.4% | 3.9% |
| Age 18 to 20 | 2.8% | 3.7% | 4.0% |
| Age 21 to 24 | 5.8% | 5.8% | 5.2% |
| Age 25 to 34 | 16.3% | 15.0% | 13.8% |
| Age 35 to 44 | 9.3% | 11.9% | 12.9% |
| Age 45 to 54 | 17.9% | 12.5% | 12.6% |
| Age 55 to 59 | 4.8% | 7.5% | 6.7% |
| Age 60 to 64 | 3.9% | 7.2% | 6.3% |
| Age 65 to 74 | 8.3% | 9.4% | 9.6% |
| Age 75 to 84 | 5.0% | 3.6% | 4.5% |
| Age 85 and over | 2.6% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | North Vernon, IN | Portage, IN | United States |
| White | 88.2% | 67.0% | 59.4% |
| Black | 2.8% | 8.6% | 12.2% |
| Asian | 0.8% | 1.4% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 1.6% | 2.1% | 3.2% |
| Hispanic | 6.6% | 20.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | North Vernon, IN | Portage, IN | United States |
| Married Population | 39.2% | 48.1% | 49.8% |
| Currently Married | 37.8% | 46.5% | 48.0% |
| Married but Separated | 1.4% | 1.6% | 1.8% |
| Single Population | 60.8% | 51.9% | 50.2% |
| Never Married | 32.1% | 32.6% | 33.8% |
| Divorced | 20.5% | 13.5% | 10.8% |
| Widowed | 8.2% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.47 | 2.54 | 2.60 |
| Households | 2,635 | 14,686 | 124,010,992 |
| Family Households | 1,721 | 9,757 | 80,755,759 |
| Married couple, w/children | 14.1% | 29.5% | 30.5% |
| Married couple, no children | 41.1% | 39.0% | 42.9% |
| Non Family Households | 914 | 4,929 | 43,255,233 |
| Single householder, w/children | 34.9% | 22.0% | 15.8% |
| Single householder, no children | 9.9% | 9.5% | 10.8% |