| | Memphis, MI | Imlay City, MI | United States |
| Population | 1,050 | 3,699 | 329,725,481 |
| Female Population | 45.1% | 54.2% | 50.5% |
| Male Population | 55.0% | 45.8% | 49.5% |
| Median Age | 46.6 | 36.2 | 38.4 |
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| Population - 2010 | 1,201 | 3,591 | 309,327,143 |
| Population - 2000 | 1,129 | 3,869 | 285,036,114 |
| Population - 1990 | 1,221 | 2,921 | 251,960,433 |
| Pop. 2000 to Now | 3.6% | -7.3% | 15.6% |
| Pop. 1990 to Now | -4.2% | 22.7% | 30.8% |
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| Population Density | 935.8 | 1,565.4 | 93.4 |
| Land Area | 1.1 | 2.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Memphis, MI | Imlay City, MI | United States |
| Age 0 to 4 | 3.0% | 6.4% | 5.9% |
| Age 5 to 9 | 7.5% | 8.9% | 6.1% |
| Age 10 to 14 | 2.6% | 6.3% | 6.6% |
| Age 15 to 17 | 5.6% | 3.0% | 3.9% |
| Age 18 to 20 | 3.3% | 2.9% | 4.0% |
| Age 21 to 24 | 4.0% | 7.5% | 5.2% |
| Age 25 to 34 | 10.6% | 13.7% | 13.8% |
| Age 35 to 44 | 11.0% | 10.4% | 12.9% |
| Age 45 to 54 | 18.7% | 14.0% | 12.6% |
| Age 55 to 59 | 7.7% | 7.2% | 6.7% |
| Age 60 to 64 | 9.3% | 5.7% | 6.3% |
| Age 65 to 74 | 12.4% | 7.8% | 9.6% |
| Age 75 to 84 | 3.2% | 4.9% | 4.5% |
| Age 85 and over | 1.0% | 1.2% | 1.9% |
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| Race | | | |
| | Memphis, MI | Imlay City, MI | United States |
| White | 97.8% | 57.6% | 59.4% |
| Black | 0.9% | 0.2% | 12.2% |
| Asian | 0.0% | 0.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.5% | 0.4% |
| Two or More Races | 1.0% | 0.8% | 3.2% |
| Hispanic | 0.3% | 39.8% | 18.4% |
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| Marriage & Family | | | |
| | Memphis, MI | Imlay City, MI | United States |
| Married Population | 47.4% | 43.5% | 49.8% |
| Currently Married | 46.9% | 40.4% | 48.0% |
| Married but Separated | 0.4% | 3.1% | 1.8% |
| Single Population | 52.6% | 56.5% | 50.2% |
| Never Married | 33.9% | 28.2% | 33.8% |
| Divorced | 13.5% | 20.4% | 10.8% |
| Widowed | 5.3% | 7.9% | 5.6% |
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| Household Size | 2.27 | 2.34 | 2.60 |
| Households | 441 | 1,572 | 124,010,992 |
| Family Households | 242 | 857 | 80,755,759 |
| Married couple, w/children | 33.9% | 35.5% | 30.5% |
| Married couple, no children | 53.3% | 27.9% | 42.9% |
| Non Family Households | 199 | 715 | 43,255,233 |
| Single householder, w/children | 3.7% | 24.4% | 15.8% |
| Single householder, no children | 9.1% | 12.3% | 10.8% |