| | Kingsville, TX | Montgomery, TX | United States |
| Population | 25,415 | 1,617 | 329,725,481 |
| Female Population | 48.4% | 52.0% | 50.5% |
| Male Population | 51.6% | 48.0% | 49.5% |
| Median Age | 27.6 | 41.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 26,432 | 624 | 309,327,143 |
| Population - 2000 | 25,575 | 489 | 285,036,114 |
| Population - 1990 | 25,276 | 356 | 251,960,433 |
| Pop. 2000 to Now | -2.3% | 235.2% | 15.6% |
| Pop. 1990 to Now | -1.1% | 360.4% | 30.8% |
| space4 | | | |
| Population Density | 1,838.5 | 343.5 | 93.4 |
| Land Area | 13.8 | 4.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kingsville, TX | Montgomery, TX | United States |
| Age 0 to 4 | 6.4% | 9.4% | 5.9% |
| Age 5 to 9 | 5.3% | 3.9% | 6.1% |
| Age 10 to 14 | 7.6% | 3.5% | 6.6% |
| Age 15 to 17 | 4.2% | 4.6% | 3.9% |
| Age 18 to 20 | 8.8% | 6.1% | 4.0% |
| Age 21 to 24 | 12.2% | 4.6% | 5.2% |
| Age 25 to 34 | 16.5% | 10.6% | 13.8% |
| Age 35 to 44 | 11.3% | 11.8% | 12.9% |
| Age 45 to 54 | 8.6% | 10.6% | 12.6% |
| Age 55 to 59 | 4.1% | 9.3% | 6.7% |
| Age 60 to 64 | 3.5% | 3.6% | 6.3% |
| Age 65 to 74 | 6.8% | 15.8% | 9.6% |
| Age 75 to 84 | 3.1% | 5.6% | 4.5% |
| Age 85 and over | 1.4% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kingsville, TX | Montgomery, TX | United States |
| White | 16.0% | 86.9% | 59.4% |
| Black | 3.6% | 2.7% | 12.2% |
| Asian | 1.9% | 1.0% | 5.6% |
| Native American | 0.2% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 2.5% | 3.2% |
| Hispanic | 76.1% | 6.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kingsville, TX | Montgomery, TX | United States |
| Married Population | 41.0% | 57.2% | 49.8% |
| Currently Married | 38.1% | 56.7% | 48.0% |
| Married but Separated | 2.9% | 0.6% | 1.8% |
| Single Population | 59.0% | 42.8% | 50.2% |
| Never Married | 47.4% | 29.6% | 33.8% |
| Divorced | 7.3% | 8.8% | 10.8% |
| Widowed | 4.2% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 2.45 | 2.51 | 2.60 |
| Households | 9,684 | 645 | 124,010,992 |
| Family Households | 5,949 | 475 | 80,755,759 |
| Married couple, w/children | 24.9% | 28.2% | 30.5% |
| Married couple, no children | 34.6% | 50.7% | 42.9% |
| Non Family Households | 3,735 | 170 | 43,255,233 |
| Single householder, w/children | 28.2% | 14.1% | 15.8% |
| Single householder, no children | 12.3% | 6.9% | 10.8% |