| | Eastland, TX | Clarendon, TX | United States |
| Population | 3,647 | 1,745 | 329,725,481 |
| Female Population | 53.3% | 51.1% | 50.5% |
| Male Population | 46.7% | 48.9% | 49.5% |
| Median Age | 51.1 | 27.6 | 38.4 |
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| Population - 2010 | 3,976 | 2,080 | 309,327,143 |
| Population - 2000 | 3,769 | 1,974 | 285,036,114 |
| Population - 1990 | 3,690 | 2,067 | 251,960,433 |
| Pop. 2000 to Now | 2.5% | -9.4% | 15.6% |
| Pop. 1990 to Now | 4.7% | -13.5% | 30.8% |
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| Population Density | 859.5 | 601.3 | 93.4 |
| Land Area | 4.2 | 2.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Eastland, TX | Clarendon, TX | United States |
| Age 0 to 4 | 3.9% | 4.5% | 5.9% |
| Age 5 to 9 | 1.0% | 5.0% | 6.1% |
| Age 10 to 14 | 3.4% | 11.3% | 6.6% |
| Age 15 to 17 | 2.6% | 4.2% | 3.9% |
| Age 18 to 20 | 2.6% | 14.8% | 4.0% |
| Age 21 to 24 | 1.9% | 5.9% | 5.2% |
| Age 25 to 34 | 9.4% | 8.5% | 13.8% |
| Age 35 to 44 | 17.5% | 12.0% | 12.9% |
| Age 45 to 54 | 11.2% | 6.6% | 12.6% |
| Age 55 to 59 | 3.3% | 2.9% | 6.7% |
| Age 60 to 64 | 14.1% | 5.1% | 6.3% |
| Age 65 to 74 | 18.7% | 13.9% | 9.6% |
| Age 75 to 84 | 3.0% | 4.5% | 4.5% |
| Age 85 and over | 7.4% | 0.7% | 1.9% |
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| Race | | | |
| | Eastland, TX | Clarendon, TX | United States |
| White | 84.2% | 72.3% | 59.4% |
| Black | 2.4% | 12.6% | 12.2% |
| Asian | 0.9% | 0.3% | 5.6% |
| Native American | 0.3% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 3.4% | 3.2% |
| Hispanic | 11.8% | 11.3% | 18.4% |
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| Marriage & Family | | | |
| | Eastland, TX | Clarendon, TX | United States |
| Married Population | 44.1% | 39.8% | 49.8% |
| Currently Married | 42.3% | 35.5% | 48.0% |
| Married but Separated | 1.7% | 4.3% | 1.8% |
| Single Population | 55.9% | 60.2% | 50.2% |
| Never Married | 31.4% | 43.4% | 33.8% |
| Divorced | 19.6% | 10.3% | 10.8% |
| Widowed | 4.9% | 6.4% | 5.6% |
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| Household Size | 2.27 | 2.48 | 2.60 |
| Households | 1,530 | 607 | 124,010,992 |
| Family Households | 847 | 342 | 80,755,759 |
| Married couple, w/children | 17.1% | 25.4% | 30.5% |
| Married couple, no children | 54.0% | 44.2% | 42.9% |
| Non Family Households | 683 | 265 | 43,255,233 |
| Single householder, w/children | 11.2% | 21.1% | 15.8% |
| Single householder, no children | 17.7% | 9.4% | 10.8% |