| | Mount Clemens, MI | Pontiac, MI | United States |
| Population | 15,735 | 61,498 | 329,725,481 |
| Female Population | 48.4% | 51.6% | 50.5% |
| Male Population | 51.6% | 48.4% | 49.5% |
| Median Age | 40.8 | 33.2 | 38.4 |
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| Population - 2010 | 16,310 | 59,688 | 309,327,143 |
| Population - 2000 | 17,312 | 66,337 | 285,036,114 |
| Population - 1990 | 18,405 | 71,166 | 251,960,433 |
| Pop. 2000 to Now | -7.5% | -11.2% | 15.6% |
| Pop. 1990 to Now | -13.0% | -17.2% | 30.8% |
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| Population Density | 3,844.4 | 3,085.7 | 93.4 |
| Land Area | 4.1 | 19.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Mount Clemens, MI | Pontiac, MI | United States |
| Age 0 to 4 | 4.1% | 8.6% | 5.9% |
| Age 5 to 9 | 5.4% | 7.0% | 6.1% |
| Age 10 to 14 | 5.5% | 5.3% | 6.6% |
| Age 15 to 17 | 4.2% | 4.0% | 3.9% |
| Age 18 to 20 | 3.5% | 4.1% | 4.0% |
| Age 21 to 24 | 4.3% | 6.9% | 5.2% |
| Age 25 to 34 | 14.5% | 16.0% | 13.8% |
| Age 35 to 44 | 14.4% | 11.9% | 12.9% |
| Age 45 to 54 | 12.5% | 12.6% | 12.6% |
| Age 55 to 59 | 8.8% | 6.1% | 6.7% |
| Age 60 to 64 | 7.3% | 5.9% | 6.3% |
| Age 65 to 74 | 9.8% | 7.1% | 9.6% |
| Age 75 to 84 | 3.2% | 2.6% | 4.5% |
| Age 85 and over | 2.5% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mount Clemens, MI | Pontiac, MI | United States |
| White | 65.1% | 23.5% | 59.4% |
| Black | 26.2% | 47.0% | 12.2% |
| Asian | 0.1% | 3.8% | 5.6% |
| Native American | 0.5% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.4% | 0.4% |
| Two or More Races | 5.1% | 4.4% | 3.2% |
| Hispanic | 2.6% | 20.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mount Clemens, MI | Pontiac, MI | United States |
| Married Population | 36.1% | 27.6% | 49.8% |
| Currently Married | 33.6% | 25.1% | 48.0% |
| Married but Separated | 2.5% | 2.5% | 1.8% |
| Single Population | 63.9% | 72.5% | 50.2% |
| Never Married | 39.9% | 51.8% | 33.8% |
| Divorced | 17.7% | 14.6% | 10.8% |
| Widowed | 6.3% | 6.1% | 5.6% |
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| Household Size | 2.20 | 2.43 | 2.60 |
| Households | 6,506 | 24,548 | 124,010,992 |
| Family Households | 3,534 | 12,618 | 80,755,759 |
| Married couple, w/children | 19.7% | 19.6% | 30.5% |
| Married couple, no children | 38.2% | 20.9% | 42.9% |
| Non Family Households | 2,972 | 11,930 | 43,255,233 |
| Single householder, w/children | 24.3% | 39.5% | 15.8% |
| Single householder, no children | 17.8% | 20.0% | 10.8% |