| | Lavon, TX | Farmersville, TX | United States |
| Population | 4,412 | 3,591 | 329,725,481 |
| Female Population | 48.5% | 55.5% | 50.5% |
| Male Population | 51.5% | 44.5% | 49.5% |
| Median Age | 34 | 35.7 | 38.4 |
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| Population - 2010 | 2,232 | 3,314 | 309,327,143 |
| Population - 2000 | 387 | 3,118 | 285,036,114 |
| Population - 1990 | 303 | 2,640 | 251,960,433 |
| Pop. 2000 to Now | 931.8% | 19.0% | 15.6% |
| Pop. 1990 to Now | 1,217.8% | 40.6% | 30.8% |
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| Population Density | 1,743.2 | 886.2 | 93.4 |
| Land Area | 2.5 | 4.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lavon, TX | Farmersville, TX | United States |
| Age 0 to 4 | 5.6% | 8.6% | 5.9% |
| Age 5 to 9 | 10.7% | 5.1% | 6.1% |
| Age 10 to 14 | 7.2% | 9.8% | 6.6% |
| Age 15 to 17 | 3.6% | 9.0% | 3.9% |
| Age 18 to 20 | 2.9% | 1.6% | 4.0% |
| Age 21 to 24 | 4.6% | 3.5% | 5.2% |
| Age 25 to 34 | 17.1% | 9.9% | 13.8% |
| Age 35 to 44 | 16.5% | 7.8% | 12.9% |
| Age 45 to 54 | 12.2% | 15.1% | 12.6% |
| Age 55 to 59 | 5.6% | 2.7% | 6.7% |
| Age 60 to 64 | 7.0% | 11.5% | 6.3% |
| Age 65 to 74 | 5.3% | 5.3% | 9.6% |
| Age 75 to 84 | 1.7% | 8.0% | 4.5% |
| Age 85 and over | 0.0% | 2.1% | 1.9% |
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| Race | | | |
| | Lavon, TX | Farmersville, TX | United States |
| White | 62.1% | 68.8% | 59.4% |
| Black | 8.1% | 14.8% | 12.2% |
| Asian | 1.7% | 0.5% | 5.6% |
| Native American | 0.3% | 1.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 4.0% | 0.0% | 3.2% |
| Hispanic | 23.7% | 14.8% | 18.4% |
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| Marriage & Family | | | |
| | Lavon, TX | Farmersville, TX | United States |
| Married Population | 59.1% | 39.4% | 49.8% |
| Currently Married | 58.9% | 37.6% | 48.0% |
| Married but Separated | 0.2% | 1.8% | 1.8% |
| Single Population | 40.9% | 60.6% | 50.2% |
| Never Married | 24.0% | 28.8% | 33.8% |
| Divorced | 13.8% | 10.1% | 10.8% |
| Widowed | 3.1% | 21.7% | 5.6% |
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| Household Size | 2.96 | 2.40 | 2.60 |
| Households | 1,492 | 1,468 | 124,010,992 |
| Family Households | 1,183 | 802 | 80,755,759 |
| Married couple, w/children | 40.0% | 43.4% | 30.5% |
| Married couple, no children | 39.8% | 20.8% | 42.9% |
| Non Family Households | 309 | 666 | 43,255,233 |
| Single householder, w/children | 10.2% | 25.4% | 15.8% |
| Single householder, no children | 10.0% | 10.3% | 10.8% |