St. Louis County, MO — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
996,618
Male
476,813
47.8%
Female
519,805
52.2%
Median Age
40.2 yrs
Avg Household Size
2.4
Foreign Born
8.1%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher32.6%
High School or Higher47.1%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
4.7%
Disability
0.0%
Non-English Home
3.9%
Married
40.5%
St. Louis County, MO has a population of 996,618 according to 2023 Census Bureau estimates. The median age is 40.2 years. The largest racial or ethnic group is White at 63.0% of the population. 32.6% of residents hold a bachelor's degree or higher. 8.1% of residents are foreign-born.