| | Brimfield, OH | Midland, MI | United States |
| Population | 3,585 | 42,425 | 329,725,481 |
| Female Population | 53.3% | 51.0% | 50.5% |
| Male Population | 46.7% | 49.0% | 49.5% |
| Median Age | 36.1 | 37.9 | 38.4 |
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| Population - 2010 | 3,318 | 41,880 | 309,327,143 |
| Population - 2000 | 3,248 | 41,685 | 285,036,114 |
| Population - 1990 | 3,223 | 38,053 | 251,960,433 |
| Pop. 2000 to Now | 3.7% | 0.2% | 15.6% |
| Pop. 1990 to Now | 4.5% | 9.8% | 30.8% |
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| Population Density | 902.3 | 1,234.8 | 93.4 |
| Land Area | 4.0 | 34.4 | 3,531,905.4 |
| Water Area | 0.0 | 2.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Brimfield, OH | Midland, MI | United States |
| Age 0 to 4 | 7.5% | 5.6% | 5.9% |
| Age 5 to 9 | 4.2% | 6.6% | 6.1% |
| Age 10 to 14 | 2.2% | 5.8% | 6.6% |
| Age 15 to 17 | 6.3% | 3.7% | 3.9% |
| Age 18 to 20 | 5.0% | 4.4% | 4.0% |
| Age 21 to 24 | 9.5% | 5.7% | 5.2% |
| Age 25 to 34 | 13.2% | 14.3% | 13.8% |
| Age 35 to 44 | 16.8% | 12.1% | 12.9% |
| Age 45 to 54 | 10.5% | 10.8% | 12.6% |
| Age 55 to 59 | 3.8% | 6.9% | 6.7% |
| Age 60 to 64 | 4.9% | 6.0% | 6.3% |
| Age 65 to 74 | 7.4% | 9.0% | 9.6% |
| Age 75 to 84 | 7.2% | 5.5% | 4.5% |
| Age 85 and over | 1.5% | 3.5% | 1.9% |
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| Race | | | |
| | Brimfield, OH | Midland, MI | United States |
| White | 94.8% | 87.4% | 59.4% |
| Black | 1.1% | 2.4% | 12.2% |
| Asian | 0.0% | 3.1% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 3.5% | 2.2% | 3.2% |
| Hispanic | 0.6% | 4.2% | 18.4% |
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| Marriage & Family | | | |
| | Brimfield, OH | Midland, MI | United States |
| Married Population | 44.4% | 52.7% | 49.8% |
| Currently Married | 44.1% | 51.4% | 48.0% |
| Married but Separated | 0.4% | 1.4% | 1.8% |
| Single Population | 55.6% | 47.3% | 50.2% |
| Never Married | 36.6% | 29.1% | 33.8% |
| Divorced | 14.3% | 12.3% | 10.8% |
| Widowed | 4.6% | 5.9% | 5.6% |
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| Household Size | 2.49 | 2.32 | 2.60 |
| Households | 1,439 | 17,813 | 124,010,992 |
| Family Households | 851 | 10,781 | 80,755,759 |
| Married couple, w/children | 36.2% | 34.5% | 30.5% |
| Married couple, no children | 39.6% | 43.9% | 42.9% |
| Non Family Households | 588 | 7,032 | 43,255,233 |
| Single householder, w/children | 9.5% | 13.7% | 15.8% |
| Single householder, no children | 14.7% | 7.9% | 10.8% |