Mehlville, Missouri
Mehlville is an unincorporated community and census-designated place in south St. Louis County, Missouri, United States, an area locally known as "South County". It is an inner-ring suburb of St. Louis, and part of the Greater St. Louis metropolitan area.
Geography
According to the United States Census Bureau, the CDP has a total area of, of which is land and, or 2.77%, is water.Demographics
| Race / Ethnicity | Pop 2000 | Pop 2010 | Pop 2020 | % 2000 | % 2010 | % 2020 |
| White alone | 27,056 | 25,674 | 24,199 | 93.87% | 90.47% | 83.57% |
| Black or African American alone | 503 | 845 | 1,313 | 1.75% | 2.98% | 4.53% |
| Native American or Alaska Native alone | 35 | 34 | 32 | 0.12% | 0.12% | 0.11% |
| Asian alone | 501 | 581 | 915 | 1.74% | 2.05% | 3.16% |
| Native Hawaiian or Pacific Islander alone | 3 | 11 | 5 | 0.01% | 0.04% | 0.02% |
| Race and ethnicity in [the United States census|Other race] alone | 20 | 17 | 95 | 0.07% | 0.06% | 0.33% |
| Mixed race or Multiracial | 287 | 393 | 1,366 | 1.00% | 1.38% | 4.72% |
| Hispanic or Latino | 417 | 825 | 1,030 | 1.45% | 2.91% | 3.56% |
| Total | 28,822 | 28,380 | 28,955 | 100.00% | 100.00% | 100.00% |
2000 census
At the 2000 census there were 28,822 people, 12,541 households, and 7,775 families living in the CDP. The population density was. There were 12,982 housing units at an average density of. The racial makeup of the CDP was 97.08% White, 0.75% African American, 0.13% Native American, 1.77% Asian, 0.02% Pacific Islander, 0.34% from other races, and 0.61% from two or more races. Hispanic or Latino of any race were 1.45%.There were 12,541 households, 25.9% had children under the age of 18 living with them, 48.6% were married couples living together, 10.2% had a female householder with no husband present, and 38.0% were non-families. 32.5% of households were one person and 12.7% were one person aged 65 or older. The average household size was 2.27 and the average family size was 2.90.
The age distribution was 21.2% under the age of 18, 9.4% from 18 to 24, 28.3% from 25 to 44, 23.1% from 45 to 64, and 18.0% 65 or older. The median age was 39 years. For every 100 females, there were 89.2 males. For every 100 females age 18 and over, there were 84.9 males.
The median household income was $43,734 and the median family income was $55,202. Males had a median income of $41,435 versus $27,551 for females. The per capita income for the CDP was $23,125. About 3.7% of families and 5.6% of the population were below the poverty line, including 6.6% of those under age 18 and 5.4% of those age 65 or over.