| | Lexington, TX | Elgin, TX | United States |
| Population | 1,303 | 9,488 | 329,725,481 |
| Female Population | 54.5% | 53.3% | 50.5% |
| Male Population | 45.5% | 46.7% | 49.5% |
| Median Age | 41.4 | 35.8 | 38.4 |
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| Population - 2010 | 1,179 | 8,294 | 309,327,143 |
| Population - 2000 | 1,178 | 5,700 | 285,036,114 |
| Population - 1990 | 953 | 4,846 | 251,960,433 |
| Pop. 2000 to Now | 6.6% | 88.7% | 15.6% |
| Pop. 1990 to Now | 31.8% | 122.0% | 30.8% |
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| Population Density | 1,050.0 | 1,517.8 | 93.4 |
| Land Area | 1.2 | 6.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lexington, TX | Elgin, TX | United States |
| Age 0 to 4 | 6.8% | 6.5% | 5.9% |
| Age 5 to 9 | 4.6% | 7.8% | 6.1% |
| Age 10 to 14 | 3.3% | 7.8% | 6.6% |
| Age 15 to 17 | 6.0% | 3.5% | 3.9% |
| Age 18 to 20 | 2.8% | 1.7% | 4.0% |
| Age 21 to 24 | 6.0% | 7.4% | 5.2% |
| Age 25 to 34 | 10.7% | 14.2% | 13.8% |
| Age 35 to 44 | 13.4% | 11.9% | 12.9% |
| Age 45 to 54 | 17.5% | 14.4% | 12.6% |
| Age 55 to 59 | 7.9% | 7.4% | 6.7% |
| Age 60 to 64 | 2.5% | 6.8% | 6.3% |
| Age 65 to 74 | 9.2% | 8.3% | 9.6% |
| Age 75 to 84 | 7.9% | 1.5% | 4.5% |
| Age 85 and over | 1.5% | 0.8% | 1.9% |
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| Race | | | |
| | Lexington, TX | Elgin, TX | United States |
| White | 72.4% | 33.4% | 59.4% |
| Black | 4.5% | 23.6% | 12.2% |
| Asian | 0.0% | 1.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 0.8% | 3.2% |
| Hispanic | 22.7% | 41.2% | 18.4% |
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| Marriage & Family | | | |
| | Lexington, TX | Elgin, TX | United States |
| Married Population | 45.3% | 41.6% | 49.8% |
| Currently Married | 41.0% | 40.6% | 48.0% |
| Married but Separated | 4.3% | 1.1% | 1.8% |
| Single Population | 54.7% | 58.4% | 50.2% |
| Never Married | 24.6% | 38.6% | 33.8% |
| Divorced | 25.5% | 16.6% | 10.8% |
| Widowed | 4.7% | 3.1% | 5.6% |
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| Household Size | 2.63 | 2.91 | 2.60 |
| Households | 495 | 3,209 | 124,010,992 |
| Family Households | 376 | 2,285 | 80,755,759 |
| Married couple, w/children | 21.8% | 22.4% | 30.5% |
| Married couple, no children | 33.5% | 36.3% | 42.9% |
| Non Family Households | 119 | 924 | 43,255,233 |
| Single householder, w/children | 35.9% | 27.6% | 15.8% |
| Single householder, no children | 8.8% | 13.7% | 10.8% |