| | Mehlville, MO | Frisco, TX | United States |
| Population | 28,672 | 193,140 | 329,725,481 |
| Female Population | 50.7% | 50.5% | 50.5% |
| Male Population | 49.3% | 49.5% | 49.5% |
| Median Age | 41.8 | 37.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 27,364 | 118,191 | 309,327,143 |
| Population - 2000 | 28,822 | 33,714 | 285,036,114 |
| Population - 1990 | 27,557 | 6,141 | 251,960,433 |
| Pop. 2000 to Now | -1.9% | 522.8% | 15.6% |
| Pop. 1990 to Now | 2.6% | 3,319.3% | 30.8% |
| space4 | | | |
| Population Density | 3,841.9 | 2,841.8 | 93.4 |
| Land Area | 7.5 | 68.0 | 3,531,905.4 |
| Water Area | 0.2 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mehlville, MO | Frisco, TX | United States |
| Age 0 to 4 | 5.4% | 5.8% | 5.9% |
| Age 5 to 9 | 5.1% | 8.2% | 6.1% |
| Age 10 to 14 | 4.9% | 9.7% | 6.6% |
| Age 15 to 17 | 2.8% | 5.8% | 3.9% |
| Age 18 to 20 | 2.5% | 3.0% | 4.0% |
| Age 21 to 24 | 6.3% | 4.0% | 5.2% |
| Age 25 to 34 | 13.7% | 9.6% | 13.8% |
| Age 35 to 44 | 12.0% | 18.4% | 12.9% |
| Age 45 to 54 | 11.8% | 17.8% | 12.6% |
| Age 55 to 59 | 7.5% | 4.8% | 6.7% |
| Age 60 to 64 | 7.6% | 3.8% | 6.3% |
| Age 65 to 74 | 11.0% | 5.8% | 9.6% |
| Age 75 to 84 | 6.8% | 2.7% | 4.5% |
| Age 85 and over | 2.6% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mehlville, MO | Frisco, TX | United States |
| White | 88.5% | 50.8% | 59.4% |
| Black | 4.5% | 8.3% | 12.2% |
| Asian | 2.7% | 24.1% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.5% | 0.4% |
| Two or More Races | 1.7% | 3.3% | 3.2% |
| Hispanic | 2.4% | 12.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mehlville, MO | Frisco, TX | United States |
| Married Population | 48.7% | 64.4% | 49.8% |
| Currently Married | 47.1% | 63.5% | 48.0% |
| Married but Separated | 1.6% | 0.9% | 1.8% |
| Single Population | 51.3% | 35.6% | 50.2% |
| Never Married | 32.5% | 24.8% | 33.8% |
| Divorced | 11.7% | 7.4% | 10.8% |
| Widowed | 7.1% | 3.4% | 5.6% |
| space5 | | | |
| Household Size | 2.18 | 2.90 | 2.60 |
| Households | 13,092 | 66,615 | 124,010,992 |
| Family Households | 7,460 | 50,829 | 80,755,759 |
| Married couple, w/children | 23.7% | 55.8% | 30.5% |
| Married couple, no children | 50.6% | 31.9% | 42.9% |
| Non Family Households | 5,632 | 15,786 | 43,255,233 |
| Single householder, w/children | 15.9% | 8.5% | 15.8% |
| Single householder, no children | 9.9% | 3.8% | 10.8% |