| | Fremont, MI | Adrian, MI | United States |
| Population | 4,455 | 20,674 | 329,725,481 |
| Female Population | 58.7% | 53.1% | 50.5% |
| Male Population | 41.3% | 46.9% | 49.5% |
| Median Age | 37.1 | 34.8 | 38.4 |
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| Population - 2010 | 4,104 | 21,153 | 309,327,143 |
| Population - 2000 | 4,224 | 21,574 | 285,036,114 |
| Population - 1990 | 3,875 | 22,097 | 251,960,433 |
| Pop. 2000 to Now | -2.9% | -5.3% | 15.6% |
| Pop. 1990 to Now | 5.9% | -7.5% | 30.8% |
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| Population Density | 1,129.9 | 2,585.2 | 93.4 |
| Land Area | 3.9 | 8.0 | 3,531,905.4 |
| Water Area | 1.3 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fremont, MI | Adrian, MI | United States |
| Age 0 to 4 | 7.2% | 5.6% | 5.9% |
| Age 5 to 9 | 5.6% | 5.4% | 6.1% |
| Age 10 to 14 | 13.4% | 6.1% | 6.6% |
| Age 15 to 17 | 3.8% | 2.4% | 3.9% |
| Age 18 to 20 | 2.1% | 9.4% | 4.0% |
| Age 21 to 24 | 6.1% | 9.1% | 5.2% |
| Age 25 to 34 | 9.2% | 12.4% | 13.8% |
| Age 35 to 44 | 17.3% | 10.5% | 12.9% |
| Age 45 to 54 | 9.4% | 10.9% | 12.6% |
| Age 55 to 59 | 3.0% | 5.0% | 6.7% |
| Age 60 to 64 | 3.3% | 5.5% | 6.3% |
| Age 65 to 74 | 8.8% | 9.5% | 9.6% |
| Age 75 to 84 | 7.9% | 4.7% | 4.5% |
| Age 85 and over | 2.9% | 3.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fremont, MI | Adrian, MI | United States |
| White | 88.7% | 71.3% | 59.4% |
| Black | 0.2% | 3.3% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.4% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 3.8% | 3.3% | 3.2% |
| Hispanic | 6.8% | 21.5% | 18.4% |
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| Marriage & Family | | | |
| | Fremont, MI | Adrian, MI | United States |
| Married Population | 53.8% | 34.0% | 49.8% |
| Currently Married | 52.8% | 31.9% | 48.0% |
| Married but Separated | 1.0% | 2.1% | 1.8% |
| Single Population | 46.2% | 66.0% | 50.2% |
| Never Married | 25.4% | 44.6% | 33.8% |
| Divorced | 13.7% | 14.7% | 10.8% |
| Widowed | 7.2% | 6.7% | 5.6% |
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| Household Size | 2.58 | 2.26 | 2.60 |
| Households | 1,715 | 8,072 | 124,010,992 |
| Family Households | 1,076 | 4,257 | 80,755,759 |
| Married couple, w/children | 39.0% | 22.7% | 30.5% |
| Married couple, no children | 36.4% | 35.5% | 42.9% |
| Non Family Households | 639 | 3,815 | 43,255,233 |
| Single householder, w/children | 17.9% | 32.4% | 15.8% |
| Single householder, no children | 6.6% | 9.4% | 10.8% |