| | Elgin, TX | Celina, TX | United States |
| Population | 9,488 | 16,542 | 329,725,481 |
| Female Population | 53.3% | 46.1% | 50.5% |
| Male Population | 46.7% | 53.9% | 49.5% |
| Median Age | 35.8 | 37.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,294 | 6,386 | 309,327,143 |
| Population - 2000 | 5,700 | 1,861 | 285,036,114 |
| Population - 1990 | 4,846 | 1,737 | 251,960,433 |
| Pop. 2000 to Now | 88.7% | 980.8% | 15.6% |
| Pop. 1990 to Now | 122.0% | 1,058.0% | 30.8% |
| space4 | | | |
| Population Density | 1,517.8 | 592.4 | 93.4 |
| Land Area | 6.3 | 27.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Elgin, TX | Celina, TX | United States |
| Age 0 to 4 | 6.5% | 5.7% | 5.9% |
| Age 5 to 9 | 7.8% | 9.4% | 6.1% |
| Age 10 to 14 | 7.8% | 8.5% | 6.6% |
| Age 15 to 17 | 3.5% | 5.5% | 3.9% |
| Age 18 to 20 | 1.7% | 1.7% | 4.0% |
| Age 21 to 24 | 7.4% | 3.3% | 5.2% |
| Age 25 to 34 | 14.2% | 13.2% | 13.8% |
| Age 35 to 44 | 11.9% | 16.7% | 12.9% |
| Age 45 to 54 | 14.4% | 13.8% | 12.6% |
| Age 55 to 59 | 7.4% | 2.8% | 6.7% |
| Age 60 to 64 | 6.8% | 5.3% | 6.3% |
| Age 65 to 74 | 8.3% | 11.5% | 9.6% |
| Age 75 to 84 | 1.5% | 2.0% | 4.5% |
| Age 85 and over | 0.8% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Elgin, TX | Celina, TX | United States |
| White | 33.4% | 64.1% | 59.4% |
| Black | 23.6% | 7.6% | 12.2% |
| Asian | 1.0% | 6.8% | 5.6% |
| Native American | 0.0% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 1.3% | 0.4% |
| Two or More Races | 0.8% | 9.4% | 3.2% |
| Hispanic | 41.2% | 9.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Elgin, TX | Celina, TX | United States |
| Married Population | 41.6% | 68.3% | 49.8% |
| Currently Married | 40.6% | 67.4% | 48.0% |
| Married but Separated | 1.1% | 0.9% | 1.8% |
| Single Population | 58.4% | 31.7% | 50.2% |
| Never Married | 38.6% | 21.0% | 33.8% |
| Divorced | 16.6% | 9.2% | 10.8% |
| Widowed | 3.1% | 1.5% | 5.6% |
| space5 | | | |
| Household Size | 2.91 | 2.93 | 2.60 |
| Households | 3,209 | 5,615 | 124,010,992 |
| Family Households | 2,285 | 5,014 | 80,755,759 |
| Married couple, w/children | 22.4% | 46.2% | 30.5% |
| Married couple, no children | 36.3% | 39.8% | 42.9% |
| Non Family Households | 924 | 601 | 43,255,233 |
| Single householder, w/children | 27.6% | 11.1% | 15.8% |
| Single householder, no children | 13.7% | 2.8% | 10.8% |