| | Eagar, AZ | Elizabethton, TN | United States |
| Population | 4,487 | 14,112 | 329,725,481 |
| Female Population | 46.7% | 53.1% | 50.5% |
| Male Population | 53.3% | 46.9% | 49.5% |
| Median Age | 38.4 | 39.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,918 | 14,238 | 309,327,143 |
| Population - 2000 | 4,033 | 13,372 | 285,036,114 |
| Population - 1990 | 4,025 | 11,931 | 251,960,433 |
| Pop. 2000 to Now | 22.9% | 0.8% | 15.6% |
| Pop. 1990 to Now | 23.1% | 13.0% | 30.8% |
| space4 | | | |
| Population Density | 399.3 | 1,477.1 | 93.4 |
| Land Area | 11.2 | 9.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Eagar, AZ | Elizabethton, TN | United States |
| Age 0 to 4 | 8.6% | 5.8% | 5.9% |
| Age 5 to 9 | 10.7% | 5.3% | 6.1% |
| Age 10 to 14 | 5.4% | 6.1% | 6.6% |
| Age 15 to 17 | 4.0% | 3.4% | 3.9% |
| Age 18 to 20 | 1.5% | 4.9% | 4.0% |
| Age 21 to 24 | 1.5% | 4.4% | 5.2% |
| Age 25 to 34 | 12.7% | 15.8% | 13.8% |
| Age 35 to 44 | 13.1% | 10.3% | 12.9% |
| Age 45 to 54 | 8.8% | 12.7% | 12.6% |
| Age 55 to 59 | 6.9% | 6.1% | 6.7% |
| Age 60 to 64 | 2.7% | 4.4% | 6.3% |
| Age 65 to 74 | 21.4% | 10.0% | 9.6% |
| Age 75 to 84 | 2.7% | 7.7% | 4.5% |
| Age 85 and over | 0.1% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Eagar, AZ | Elizabethton, TN | United States |
| White | 79.7% | 89.4% | 59.4% |
| Black | 0.0% | 4.1% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 2.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.2% | 2.1% | 3.2% |
| Hispanic | 17.0% | 3.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Eagar, AZ | Elizabethton, TN | United States |
| Married Population | 59.3% | 45.5% | 49.8% |
| Currently Married | 58.4% | 42.5% | 48.0% |
| Married but Separated | 0.9% | 3.0% | 1.8% |
| Single Population | 40.7% | 54.5% | 50.2% |
| Never Married | 28.5% | 31.2% | 33.8% |
| Divorced | 9.0% | 14.3% | 10.8% |
| Widowed | 3.3% | 9.0% | 5.6% |
| space5 | | | |
| Household Size | 3.09 | 2.31 | 2.60 |
| Households | 1,447 | 5,500 | 124,010,992 |
| Family Households | 1,076 | 3,304 | 80,755,759 |
| Married couple, w/children | 23.4% | 26.9% | 30.5% |
| Married couple, no children | 57.7% | 43.3% | 42.9% |
| Non Family Households | 371 | 2,196 | 43,255,233 |
| Single householder, w/children | 14.3% | 21.2% | 15.8% |
| Single householder, no children | 4.6% | 8.6% | 10.8% |