| | Spearman, TX | Fairfield, TX | United States |
| Population | 2,935 | 2,864 | 329,725,481 |
| Female Population | 51.9% | 47.6% | 50.5% |
| Male Population | 48.1% | 52.4% | 49.5% |
| Median Age | 35.3 | 32.7 | 38.4 |
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| Population - 2010 | 3,359 | 2,950 | 309,327,143 |
| Population - 2000 | 3,021 | 3,094 | 285,036,114 |
| Population - 1990 | 3,197 | 3,234 | 251,960,433 |
| Pop. 2000 to Now | 5.2% | -7.1% | 15.6% |
| Pop. 1990 to Now | -0.6% | -11.1% | 30.8% |
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| Population Density | 1,405.7 | 524.6 | 93.4 |
| Land Area | 2.1 | 5.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Spearman, TX | Fairfield, TX | United States |
| Age 0 to 4 | 8.7% | 7.3% | 5.9% |
| Age 5 to 9 | 7.5% | 10.0% | 6.1% |
| Age 10 to 14 | 5.6% | 4.7% | 6.6% |
| Age 15 to 17 | 6.8% | 6.3% | 3.9% |
| Age 18 to 20 | 2.1% | 2.3% | 4.0% |
| Age 21 to 24 | 5.9% | 6.9% | 5.2% |
| Age 25 to 34 | 12.9% | 16.7% | 13.8% |
| Age 35 to 44 | 11.4% | 11.5% | 12.9% |
| Age 45 to 54 | 9.9% | 12.8% | 12.6% |
| Age 55 to 59 | 2.7% | 2.5% | 6.7% |
| Age 60 to 64 | 7.1% | 4.6% | 6.3% |
| Age 65 to 74 | 10.5% | 6.6% | 9.6% |
| Age 75 to 84 | 5.1% | 5.3% | 4.5% |
| Age 85 and over | 3.8% | 2.5% | 1.9% |
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| Race | | | |
| | Spearman, TX | Fairfield, TX | United States |
| White | 47.6% | 54.3% | 59.4% |
| Black | 0.3% | 13.1% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.9% | 0.4% |
| Two or More Races | 0.0% | 0.4% | 3.2% |
| Hispanic | 52.1% | 30.3% | 18.4% |
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| Marriage & Family | | | |
| | Spearman, TX | Fairfield, TX | United States |
| Married Population | 61.7% | 45.9% | 49.8% |
| Currently Married | 59.1% | 45.1% | 48.0% |
| Married but Separated | 2.6% | 0.9% | 1.8% |
| Single Population | 38.3% | 54.1% | 50.2% |
| Never Married | 23.5% | 35.7% | 33.8% |
| Divorced | 3.8% | 12.0% | 10.8% |
| Widowed | 11.0% | 6.4% | 5.6% |
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| Household Size | 2.68 | 3.09 | 2.60 |
| Households | 1,074 | 868 | 124,010,992 |
| Family Households | 746 | 624 | 80,755,759 |
| Married couple, w/children | 45.6% | 41.5% | 30.5% |
| Married couple, no children | 41.4% | 26.3% | 42.9% |
| Non Family Households | 328 | 244 | 43,255,233 |
| Single householder, w/children | 10.9% | 20.8% | 15.8% |
| Single householder, no children | 2.1% | 11.4% | 10.8% |