| | Jarrell, TX | Elgin, TX | United States |
| Population | 1,924 | 9,488 | 329,725,481 |
| Female Population | 46.0% | 53.3% | 50.5% |
| Male Population | 54.1% | 46.7% | 49.5% |
| Median Age | 37.8 | 35.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,039 | 8,294 | 309,327,143 |
| Population - 2000 | 976 | 5,700 | 285,036,114 |
| Population - 1990 | 606 | 4,846 | 251,960,433 |
| Pop. 2000 to Now | 112.8% | 88.7% | 15.6% |
| Pop. 1990 to Now | 242.7% | 122.0% | 30.8% |
| space4 | | | |
| Population Density | 790.5 | 1,517.8 | 93.4 |
| Land Area | 2.4 | 6.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jarrell, TX | Elgin, TX | United States |
| Age 0 to 4 | 5.4% | 6.5% | 5.9% |
| Age 5 to 9 | 7.7% | 7.8% | 6.1% |
| Age 10 to 14 | 4.9% | 7.8% | 6.6% |
| Age 15 to 17 | 3.8% | 3.5% | 3.9% |
| Age 18 to 20 | 4.3% | 1.7% | 4.0% |
| Age 21 to 24 | 3.8% | 7.4% | 5.2% |
| Age 25 to 34 | 11.0% | 14.2% | 13.8% |
| Age 35 to 44 | 22.0% | 11.9% | 12.9% |
| Age 45 to 54 | 9.0% | 14.4% | 12.6% |
| Age 55 to 59 | 8.0% | 7.4% | 6.7% |
| Age 60 to 64 | 7.2% | 6.8% | 6.3% |
| Age 65 to 74 | 8.5% | 8.3% | 9.6% |
| Age 75 to 84 | 4.3% | 1.5% | 4.5% |
| Age 85 and over | 0.2% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jarrell, TX | Elgin, TX | United States |
| White | 68.3% | 33.4% | 59.4% |
| Black | 0.0% | 23.6% | 12.2% |
| Asian | 0.2% | 1.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 0.8% | 3.2% |
| Hispanic | 29.5% | 41.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Jarrell, TX | Elgin, TX | United States |
| Married Population | 61.7% | 41.6% | 49.8% |
| Currently Married | 60.7% | 40.6% | 48.0% |
| Married but Separated | 1.0% | 1.1% | 1.8% |
| Single Population | 38.3% | 58.4% | 50.2% |
| Never Married | 22.0% | 38.6% | 33.8% |
| Divorced | 9.4% | 16.6% | 10.8% |
| Widowed | 6.8% | 3.1% | 5.6% |
| space5 | | | |
| Household Size | 2.80 | 2.91 | 2.60 |
| Households | 686 | 3,209 | 124,010,992 |
| Family Households | 555 | 2,285 | 80,755,759 |
| Married couple, w/children | 37.5% | 22.4% | 30.5% |
| Married couple, no children | 45.6% | 36.3% | 42.9% |
| Non Family Households | 131 | 924 | 43,255,233 |
| Single householder, w/children | 8.6% | 27.6% | 15.8% |
| Single householder, no children | 8.3% | 13.7% | 10.8% |