Total Population in St. Louis County, MO
ACS 2024 5-Year Estimates
995,569
Rank #50/3,222 · #1 in MO
98th
St. Louis 995,569
MO 6,191,814 -83.9%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How St. Louis County's total population of 995,569 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to St. Louis County for total population.
Nearby Rankings
Full ranking →| #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 |
About Total Population
St. Louis County, Missouri has a total population of 995,569, ranking #50 of 3,222 counties nationwide — 99.7% below the national value of 330M. Within Missouri, it ranks #1 of 115. This places it in the 98th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.