| | Norwalk, OH | Fremont, OH | United States |
| Population | 17,048 | 15,954 | 329,725,481 |
| Female Population | 51.9% | 51.5% | 50.5% |
| Male Population | 48.2% | 48.5% | 49.5% |
| Median Age | 39 | 36.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 17,088 | 16,614 | 309,327,143 |
| Population - 2000 | 16,238 | 17,375 | 285,036,114 |
| Population - 1990 | 14,731 | 17,648 | 251,960,433 |
| Pop. 2000 to Now | 3.4% | -8.8% | 15.6% |
| Pop. 1990 to Now | 13.9% | -10.3% | 30.8% |
| space4 | | | |
| Population Density | 1,923.5 | 1,892.5 | 93.4 |
| Land Area | 8.9 | 8.4 | 3,531,905.4 |
| Water Area | 0.3 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Norwalk, OH | Fremont, OH | United States |
| Age 0 to 4 | 6.6% | 5.7% | 5.9% |
| Age 5 to 9 | 6.4% | 6.4% | 6.1% |
| Age 10 to 14 | 5.9% | 9.0% | 6.6% |
| Age 15 to 17 | 5.1% | 4.9% | 3.9% |
| Age 18 to 20 | 2.7% | 3.4% | 4.0% |
| Age 21 to 24 | 4.0% | 4.1% | 5.2% |
| Age 25 to 34 | 14.7% | 14.0% | 13.8% |
| Age 35 to 44 | 11.2% | 13.8% | 12.9% |
| Age 45 to 54 | 12.6% | 11.0% | 12.6% |
| Age 55 to 59 | 5.9% | 6.9% | 6.7% |
| Age 60 to 64 | 6.9% | 5.5% | 6.3% |
| Age 65 to 74 | 11.2% | 9.1% | 9.6% |
| Age 75 to 84 | 4.4% | 4.3% | 4.5% |
| Age 85 and over | 2.3% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Norwalk, OH | Fremont, OH | United States |
| White | 86.9% | 73.4% | 59.4% |
| Black | 1.5% | 6.5% | 12.2% |
| Asian | 0.0% | 0.5% | 5.6% |
| Native American | 0.0% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.1% | 0.4% |
| Two or More Races | 2.5% | 3.5% | 3.2% |
| Hispanic | 8.4% | 15.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Norwalk, OH | Fremont, OH | United States |
| Married Population | 47.8% | 41.6% | 49.8% |
| Currently Married | 45.0% | 40.3% | 48.0% |
| Married but Separated | 2.8% | 1.2% | 1.8% |
| Single Population | 52.2% | 58.4% | 50.2% |
| Never Married | 29.6% | 34.7% | 33.8% |
| Divorced | 14.0% | 17.1% | 10.8% |
| Widowed | 8.6% | 6.7% | 5.6% |
| space5 | | | |
| Household Size | 2.29 | 2.37 | 2.60 |
| Households | 7,300 | 6,556 | 124,010,992 |
| Family Households | 4,016 | 3,662 | 80,755,759 |
| Married couple, w/children | 32.1% | 33.4% | 30.5% |
| Married couple, no children | 39.0% | 32.4% | 42.9% |
| Non Family Households | 3,284 | 2,894 | 43,255,233 |
| Single householder, w/children | 19.5% | 19.8% | 15.8% |
| Single householder, no children | 9.3% | 14.4% | 10.8% |