| | Birch Run township, MI | Bridgeport charter, MI | United States |
| Population | 5,872 | 10,085 | 329,725,481 |
| Female Population | 47.8% | 52.7% | 50.5% |
| Male Population | 52.2% | 47.3% | 49.5% |
| Median Age | 42.1 | 40.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,022 | 10,488 | 309,327,143 |
| Population - 2000 | 6,191 | 11,709 | 285,036,114 |
| Population - 1990 | 5,354 | 12,747 | 251,960,433 |
| Pop. 2000 to Now | -7.9% | -16.9% | 15.6% |
| Pop. 1990 to Now | 6.5% | -23.7% | 30.8% |
| space4 | | | |
| Population Density | 165.4 | 291.5 | 93.4 |
| Land Area | 35.5 | 34.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Birch Run township, MI | Bridgeport charter, MI | United States |
| Age 0 to 4 | 5.7% | 6.2% | 5.9% |
| Age 5 to 9 | 5.3% | 5.0% | 6.1% |
| Age 10 to 14 | 5.0% | 7.2% | 6.6% |
| Age 15 to 17 | 5.9% | 5.0% | 3.9% |
| Age 18 to 20 | 4.2% | 3.9% | 4.0% |
| Age 21 to 24 | 6.7% | 3.9% | 5.2% |
| Age 25 to 34 | 11.6% | 12.8% | 13.8% |
| Age 35 to 44 | 7.6% | 10.1% | 12.9% |
| Age 45 to 54 | 16.3% | 10.0% | 12.6% |
| Age 55 to 59 | 5.9% | 6.2% | 6.7% |
| Age 60 to 64 | 10.1% | 7.8% | 6.3% |
| Age 65 to 74 | 9.9% | 12.3% | 9.6% |
| Age 75 to 84 | 4.4% | 6.5% | 4.5% |
| Age 85 and over | 1.3% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Birch Run township, MI | Bridgeport charter, MI | United States |
| White | 94.3% | 56.9% | 59.4% |
| Black | 0.6% | 28.5% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 1.7% | 3.2% |
| Hispanic | 4.8% | 12.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Birch Run township, MI | Bridgeport charter, MI | United States |
| Married Population | 54.9% | 42.4% | 49.8% |
| Currently Married | 54.8% | 41.0% | 48.0% |
| Married but Separated | 0.1% | 1.4% | 1.8% |
| Single Population | 45.1% | 57.6% | 50.2% |
| Never Married | 31.4% | 38.0% | 33.8% |
| Divorced | 9.5% | 10.0% | 10.8% |
| Widowed | 4.2% | 9.6% | 5.6% |
| space5 | | | |
| Household Size | 2.59 | 2.41 | 2.60 |
| Households | 2,268 | 4,139 | 124,010,992 |
| Family Households | 1,589 | 2,732 | 80,755,759 |
| Married couple, w/children | 35.8% | 18.2% | 30.5% |
| Married couple, no children | 49.2% | 40.0% | 42.9% |
| Non Family Households | 679 | 1,407 | 43,255,233 |
| Single householder, w/children | 4.0% | 31.4% | 15.8% |
| Single householder, no children | 11.1% | 10.3% | 10.8% |