| | Farmington, NH | Exeter, NH | United States |
| Population | 6,748 | 15,847 | 329,725,481 |
| Female Population | 52.5% | 55.3% | 50.5% |
| Male Population | 47.6% | 44.7% | 49.5% |
| Median Age | 42.7 | 46.5 | 38.4 |
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| Population - 2010 | 6,778 | 14,301 | 309,327,143 |
| Population - 2000 | 5,774 | 14,058 | 285,036,114 |
| Population - 1990 | 5,739 | 12,481 | 251,960,433 |
| Pop. 2000 to Now | 20.4% | 8.8% | 15.6% |
| Pop. 1990 to Now | 21.1% | 22.6% | 30.8% |
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| Population Density | 181.3 | 810.3 | 93.4 |
| Land Area | 37.2 | 19.6 | 3,531,905.4 |
| Water Area | 0.3 | 0.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Farmington, NH | Exeter, NH | United States |
| Age 0 to 4 | 7.0% | 3.3% | 5.9% |
| Age 5 to 9 | 2.9% | 5.8% | 6.1% |
| Age 10 to 14 | 9.1% | 6.3% | 6.6% |
| Age 15 to 17 | 2.2% | 3.5% | 3.9% |
| Age 18 to 20 | 2.8% | 4.0% | 4.0% |
| Age 21 to 24 | 4.5% | 3.6% | 5.2% |
| Age 25 to 34 | 17.4% | 9.4% | 13.8% |
| Age 35 to 44 | 6.2% | 11.6% | 12.9% |
| Age 45 to 54 | 14.3% | 16.5% | 12.6% |
| Age 55 to 59 | 12.4% | 7.4% | 6.7% |
| Age 60 to 64 | 8.3% | 6.1% | 6.3% |
| Age 65 to 74 | 7.1% | 9.8% | 9.6% |
| Age 75 to 84 | 3.8% | 8.2% | 4.5% |
| Age 85 and over | 2.0% | 4.7% | 1.9% |
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| Race | | | |
| | Farmington, NH | Exeter, NH | United States |
| White | 92.1% | 89.9% | 59.4% |
| Black | 2.1% | 1.2% | 12.2% |
| Asian | 1.4% | 3.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.2% | 0.1% | 0.4% |
| Two or More Races | 2.1% | 2.5% | 3.2% |
| Hispanic | 1.0% | 2.5% | 18.4% |
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| Marriage & Family | | | |
| | Farmington, NH | Exeter, NH | United States |
| Married Population | 56.9% | 50.6% | 49.8% |
| Currently Married | 53.2% | 49.9% | 48.0% |
| Married but Separated | 3.8% | 0.7% | 1.8% |
| Single Population | 43.1% | 49.4% | 50.2% |
| Never Married | 26.7% | 26.5% | 33.8% |
| Divorced | 8.6% | 14.3% | 10.8% |
| Widowed | 7.7% | 8.5% | 5.6% |
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| Household Size | 2.43 | 2.29 | 2.60 |
| Households | 2,773 | 6,739 | 124,010,992 |
| Family Households | 1,989 | 3,744 | 80,755,759 |
| Married couple, w/children | 23.4% | 36.2% | 30.5% |
| Married couple, no children | 51.2% | 47.9% | 42.9% |
| Non Family Households | 784 | 2,995 | 43,255,233 |
| Single householder, w/children | 20.9% | 9.4% | 15.8% |
| Single householder, no children | 4.5% | 6.5% | 10.8% |