| | Millington, TN | New Bedford, MA | United States |
| Population | 10,583 | 100,309 | 329,725,481 |
| Female Population | 51.0% | 50.1% | 50.5% |
| Male Population | 49.0% | 49.9% | 49.5% |
| Median Age | 38.2 | 36.5 | 38.4 |
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| Population - 2010 | 10,779 | 95,053 | 309,327,143 |
| Population - 2000 | 10,433 | 93,768 | 285,036,114 |
| Population - 1990 | 17,866 | 99,922 | 251,960,433 |
| Pop. 2000 to Now | 1.9% | 1.9% | 15.6% |
| Pop. 1990 to Now | -40.5% | -4.4% | 30.8% |
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| Population Density | 472.4 | 5,016.2 | 93.4 |
| Land Area | 22.4 | 20.0 | 3,531,905.4 |
| Water Area | 0.0 | 4.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Millington, TN | New Bedford, MA | United States |
| Age 0 to 4 | 4.8% | 6.7% | 5.9% |
| Age 5 to 9 | 6.6% | 6.2% | 6.1% |
| Age 10 to 14 | 9.6% | 6.2% | 6.6% |
| Age 15 to 17 | 5.1% | 4.3% | 3.9% |
| Age 18 to 20 | 3.2% | 3.7% | 4.0% |
| Age 21 to 24 | 4.0% | 6.3% | 5.2% |
| Age 25 to 34 | 13.5% | 14.7% | 13.8% |
| Age 35 to 44 | 9.7% | 12.9% | 12.9% |
| Age 45 to 54 | 13.2% | 12.5% | 12.6% |
| Age 55 to 59 | 9.3% | 5.7% | 6.7% |
| Age 60 to 64 | 6.4% | 5.5% | 6.3% |
| Age 65 to 74 | 9.3% | 8.9% | 9.6% |
| Age 75 to 84 | 2.5% | 4.0% | 4.5% |
| Age 85 and over | 2.7% | 2.4% | 1.9% |
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| Race | | | |
| | Millington, TN | New Bedford, MA | United States |
| White | 54.1% | 58.0% | 59.4% |
| Black | 30.8% | 5.4% | 12.2% |
| Asian | 2.4% | 1.4% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.0% | 5.5% | 0.4% |
| Two or More Races | 2.9% | 6.5% | 3.2% |
| Hispanic | 9.6% | 23.1% | 18.4% |
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| Marriage & Family | | | |
| | Millington, TN | New Bedford, MA | United States |
| Married Population | 47.1% | 39.1% | 49.8% |
| Currently Married | 44.6% | 35.6% | 48.0% |
| Married but Separated | 2.5% | 3.5% | 1.8% |
| Single Population | 52.9% | 60.9% | 50.2% |
| Never Married | 31.3% | 42.8% | 33.8% |
| Divorced | 14.2% | 11.9% | 10.8% |
| Widowed | 7.4% | 6.2% | 5.6% |
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| Household Size | 2.52 | 2.38 | 2.60 |
| Households | 4,086 | 41,395 | 124,010,992 |
| Family Households | 2,783 | 24,021 | 80,755,759 |
| Married couple, w/children | 20.3% | 22.6% | 30.5% |
| Married couple, no children | 45.3% | 32.9% | 42.9% |
| Non Family Households | 1,303 | 17,374 | 43,255,233 |
| Single householder, w/children | 22.6% | 29.7% | 15.8% |
| Single householder, no children | 11.8% | 14.9% | 10.8% |