| | Chichester, NH | Fort Defiance, AZ | United States |
| Population | 2,677 | 3,723 | 329,725,481 |
| Female Population | 46.8% | 52.0% | 50.5% |
| Male Population | 53.2% | 48.1% | 49.5% |
| Median Age | 45.4 | 33 | 38.4 |
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| Population - 2010 | 2,531 | 4,349 | 309,327,143 |
| Population - 2000 | 2,236 | 4,061 | 285,036,114 |
| Population - 1990 | 1,942 | 4,489 | 251,960,433 |
| Pop. 2000 to Now | 22.1% | 2.6% | 15.6% |
| Pop. 1990 to Now | 40.5% | -7.2% | 30.8% |
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| Population Density | 127.4 | 611.9 | 93.4 |
| Land Area | 21.0 | 6.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Chichester, NH | Fort Defiance, AZ | United States |
| Age 0 to 4 | 3.5% | 4.4% | 5.9% |
| Age 5 to 9 | 4.9% | 7.5% | 6.1% |
| Age 10 to 14 | 9.3% | 10.1% | 6.6% |
| Age 15 to 17 | 3.1% | 3.7% | 3.9% |
| Age 18 to 20 | 2.1% | 5.1% | 4.0% |
| Age 21 to 24 | 2.8% | 4.7% | 5.2% |
| Age 25 to 34 | 10.8% | 16.8% | 13.8% |
| Age 35 to 44 | 11.6% | 13.3% | 12.9% |
| Age 45 to 54 | 21.4% | 9.0% | 12.6% |
| Age 55 to 59 | 9.2% | 9.9% | 6.7% |
| Age 60 to 64 | 5.6% | 3.0% | 6.3% |
| Age 65 to 74 | 11.0% | 7.8% | 9.6% |
| Age 75 to 84 | 3.3% | 4.1% | 4.5% |
| Age 85 and over | 1.3% | 0.7% | 1.9% |
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| Race | | | |
| | Chichester, NH | Fort Defiance, AZ | United States |
| White | 93.2% | 2.1% | 59.4% |
| Black | 0.1% | 0.8% | 12.2% |
| Asian | 2.2% | 1.7% | 5.6% |
| Native American | 0.0% | 92.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.0% | 1.2% | 3.2% |
| Hispanic | 0.4% | 2.1% | 18.4% |
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| Marriage & Family | | | |
| | Chichester, NH | Fort Defiance, AZ | United States |
| Married Population | 61.9% | 23.7% | 49.8% |
| Currently Married | 61.5% | 17.8% | 48.0% |
| Married but Separated | 0.4% | 5.9% | 1.8% |
| Single Population | 38.1% | 76.3% | 50.2% |
| Never Married | 17.6% | 55.8% | 33.8% |
| Divorced | 16.3% | 13.9% | 10.8% |
| Widowed | 4.1% | 6.6% | 5.6% |
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| Household Size | 2.71 | 3.85 | 2.60 |
| Households | 984 | 967 | 124,010,992 |
| Family Households | 789 | 631 | 80,755,759 |
| Married couple, w/children | 37.1% | 13.2% | 30.5% |
| Married couple, no children | 44.4% | 21.7% | 42.9% |
| Non Family Households | 195 | 336 | 43,255,233 |
| Single householder, w/children | 13.8% | 30.0% | 15.8% |
| Single householder, no children | 4.7% | 35.2% | 10.8% |