Total Population in St. Louis County, MO
ACS 2024 5-Year Estimates
How St. Louis County Compares
National Distribution
Where St. Louis County falls among all 3,222 U.S. counties for total population.
■ St. Louis County: 995,569
Ranking Context
| Rank | County | Value |
|---|---|---|
| #47 | Fresno County, CA | 1,016,725 |
| #48 | Honolulu County, HI | 1,001,146 |
| #49 | Westchester County, NY | 999,677 |
| #50 | St. Louis County, MO | 995,569 |
| #51 | Gwinnett County, GA | 979,864 |
| #52 | Denton County, TX | 979,561 |
| #53 | Capitol Planning Region, CT | 977,290 |
Total Population in St. Louis County, Missouri
St. Louis County, Missouri has a total population of 995,569, which ranks #50 of 3,222 out of 3,222 counties nationwide. This is 99.7% below the national value of 330M.
Within Missouri, St. Louis County ranks #1 of 115 out of 115 counties. This places it in the 98th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.