| | Fort Gratiot charter, MI | North Manchester, IN | United States |
| Population | 11,198 | 5,269 | 329,725,481 |
| Female Population | 52.9% | 53.8% | 50.5% |
| Male Population | 47.2% | 46.2% | 49.5% |
| Median Age | 48 | 32.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 11,100 | 6,099 | 309,327,143 |
| Population - 2000 | 10,691 | 6,260 | 285,036,114 |
| Population - 1990 | 8,968 | 6,383 | 251,960,433 |
| Pop. 2000 to Now | 2.8% | -8.8% | 15.6% |
| Pop. 1990 to Now | 22.5% | -10.5% | 30.8% |
| space4 | | | |
| Population Density | 701.8 | 1,491.0 | 93.4 |
| Land Area | 16.0 | 3.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fort Gratiot charter, MI | North Manchester, IN | United States |
| Age 0 to 4 | 4.3% | 5.8% | 5.9% |
| Age 5 to 9 | 3.8% | 4.5% | 6.1% |
| Age 10 to 14 | 8.7% | 7.4% | 6.6% |
| Age 15 to 17 | 4.1% | 1.8% | 3.9% |
| Age 18 to 20 | 3.0% | 11.3% | 4.0% |
| Age 21 to 24 | 4.2% | 7.0% | 5.2% |
| Age 25 to 34 | 7.2% | 14.4% | 13.8% |
| Age 35 to 44 | 11.9% | 7.4% | 12.9% |
| Age 45 to 54 | 13.5% | 10.3% | 12.6% |
| Age 55 to 59 | 7.0% | 4.4% | 6.7% |
| Age 60 to 64 | 6.6% | 4.9% | 6.3% |
| Age 65 to 74 | 14.8% | 8.3% | 9.6% |
| Age 75 to 84 | 7.3% | 7.2% | 4.5% |
| Age 85 and over | 3.6% | 5.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fort Gratiot charter, MI | North Manchester, IN | United States |
| White | 93.7% | 91.4% | 59.4% |
| Black | 1.2% | 3.2% | 12.2% |
| Asian | 0.2% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 1.5% | 1.2% | 3.2% |
| Hispanic | 3.3% | 3.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fort Gratiot charter, MI | North Manchester, IN | United States |
| Married Population | 58.8% | 45.2% | 49.8% |
| Currently Married | 57.7% | 42.3% | 48.0% |
| Married but Separated | 1.1% | 2.9% | 1.8% |
| Single Population | 41.2% | 54.8% | 50.2% |
| Never Married | 22.2% | 35.3% | 33.8% |
| Divorced | 10.1% | 10.2% | 10.8% |
| Widowed | 8.8% | 9.2% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 2.30 | 2.60 |
| Households | 4,480 | 1,812 | 124,010,992 |
| Family Households | 3,098 | 1,071 | 80,755,759 |
| Married couple, w/children | 30.0% | 30.7% | 30.5% |
| Married couple, no children | 51.7% | 45.4% | 42.9% |
| Non Family Households | 1,382 | 741 | 43,255,233 |
| Single householder, w/children | 11.4% | 17.6% | 15.8% |
| Single householder, no children | 6.8% | 6.3% | 10.8% |