| | Terre Hill, PA | Plymouth, NC | United States |
| Population | 1,042 | 3,315 | 329,725,481 |
| Female Population | 49.8% | 38.2% | 50.5% |
| Male Population | 50.2% | 61.8% | 49.5% |
| Median Age | 34.6 | 47 | 38.4 |
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| Population - 2010 | 1,303 | 3,846 | 309,327,143 |
| Population - 2000 | 1,237 | 4,107 | 285,036,114 |
| Population - 1990 | 1,282 | 4,328 | 251,960,433 |
| Pop. 2000 to Now | 15.2% | -18.9% | 15.6% |
| Pop. 1990 to Now | 11.2% | -23.0% | 30.8% |
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| Population Density | 2,290.1 | 822.8 | 93.4 |
| Land Area | 0.5 | 4.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Terre Hill, PA | Plymouth, NC | United States |
| Age 0 to 4 | 8.0% | 0.5% | 5.9% |
| Age 5 to 9 | 12.6% | 1.3% | 6.1% |
| Age 10 to 14 | 2.9% | 10.2% | 6.6% |
| Age 15 to 17 | 5.7% | 7.6% | 3.9% |
| Age 18 to 20 | 2.2% | 9.0% | 4.0% |
| Age 21 to 24 | 2.8% | 0.0% | 5.2% |
| Age 25 to 34 | 17.5% | 7.2% | 13.8% |
| Age 35 to 44 | 14.7% | 8.8% | 12.9% |
| Age 45 to 54 | 6.6% | 13.9% | 12.6% |
| Age 55 to 59 | 4.6% | 7.0% | 6.7% |
| Age 60 to 64 | 8.8% | 12.5% | 6.3% |
| Age 65 to 74 | 7.8% | 13.4% | 9.6% |
| Age 75 to 84 | 3.4% | 5.2% | 4.5% |
| Age 85 and over | 2.6% | 3.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Terre Hill, PA | Plymouth, NC | United States |
| White | 94.4% | 28.4% | 59.4% |
| Black | 0.0% | 70.1% | 12.2% |
| Asian | 0.2% | 0.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 1.4% | 0.4% |
| Two or More Races | 0.8% | 0.0% | 3.2% |
| Hispanic | 3.8% | 0.1% | 18.4% |
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| Marriage & Family | | | |
| | Terre Hill, PA | Plymouth, NC | United States |
| Married Population | 60.8% | 25.8% | 49.8% |
| Currently Married | 59.9% | 18.3% | 48.0% |
| Married but Separated | 0.9% | 7.5% | 1.8% |
| Single Population | 39.2% | 74.2% | 50.2% |
| Never Married | 23.2% | 42.0% | 33.8% |
| Divorced | 6.5% | 18.7% | 10.8% |
| Widowed | 9.5% | 13.5% | 5.6% |
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| Household Size | 2.75 | 1.98 | 2.60 |
| Households | 379 | 1,615 | 124,010,992 |
| Family Households | 271 | 555 | 80,755,759 |
| Married couple, w/children | 46.9% | 3.1% | 30.5% |
| Married couple, no children | 33.6% | 36.9% | 42.9% |
| Non Family Households | 108 | 1,060 | 43,255,233 |
| Single householder, w/children | 11.1% | 44.1% | 15.8% |
| Single householder, no children | 8.5% | 15.9% | 10.8% |