How many people live in ?

Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 279,700 people living in St. Louis Independent City, MO. That makes St. Louis Independent City the fifth-most populous county in Missouri. It is home to 4.5% of people living in the state.

280K

population of St. Louis Independent City, MO (2024)

4.5%

County share of the Missouri population (2024)

About 279,700 people lived in St. Louis Independent City, MO in 2024.

Population estimates, 2000–2024

What are St. Louis Independent City, MO’s age demographics?

About 47,000 St. Louis Independent City, MO residents are aged 65 and older in 2024. That represents 16.8% of its population. For comparison, the age group represents 18.8% of Missouri’s population and 18% in the US overall.
Another 49,900 St. Louis Independent City residents, or 17.8% of the population, were children under 18. For comparison, the age group represents 22% of Missouri’s population and 21.6% in the US overall.

A higher share of St. Louis Independent City, MO's population is aged 25–44 than the US as a whole.

Population estimates by age group, (2024)

What are St. Louis Independent City, MO’s racial and ethnic demographics?

Non-Hispanic Black or African American residents make up 42% of the St. Louis Independent City, MO population, higher than the national share of 12.6%. St. Louis Independent City, MO also has a larger share of people identifying as non-Hispanic two or more races (2.6%) than the US overall (2.5%).
In contrast, St. Louis Independent City’s Hispanic population accounts for 5.7%, below the 20% nationwide, and the non-Hispanic white population makes up 45.5% of the city, compared with 57.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.

St. Louis Independent City, MO has a higher share of a non-Hispanic Black or African American population than Missouri as a whole.

Population estimates by race and ethnicity, (2024)

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Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.