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Jul 1, 2022 · Population, Census, April 1, 2020: 1,004,125: Population, Census, April 1, 2010: 998,954: Age and Sex
Apr 10, 2024 · Discover St. Louis County, MO’s population & how it has changed over time. USAFacts uses Census data to break down the population of St. Louis County by race, age,and more. View today.
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- Florissant. 50,436. 52,441. -1.05% 4,018. 12.55.
- Chesterfield. 48,503. 49,950. -0.84% 1,522. 31.88.
- Oakville. 35,412. 36,117. 2,230. 15.88.
- Wildwood. 34,380. 35,384. -0.83% 516. 66.64.
At the 2020 census, the total population was 1,004,125, [1] making it the most populous county in Missouri. Its county seat is Clayton. [2] . The county is included in the St. Louis, MO–IL metropolitan statistical area. After Great Britain took over former French territory east of the Mississippi River, many ethnic French colonists moved west.
- October 1, 1812
- Clayton
Demographics. Age. 40.4 Median age. a little higher than the figure in Missouri: 39.1. a little higher than the figure in United States: 39. Population by age range. 11% 0-913% 10-1912% 20-2913% 30-3912% 40-4912% 50-5913% 60-699% 70-795% 80+. Show data / Embed. Population by age category. 18 to 64 59% Under 18. 18 to 64. 65 and over.
- St. Louis County, MO
The estimated population of St. Louis County, Missouri is 1,001,982 people, with a median age of 40.3. We can look at the total population in St. Louis County over the last 5 years to see how much it has changed.
Mar 14, 2024 · Resident Population in St. Louis County, MO (MOSLPOP) 2023: 987.059 | Thousands of Persons | Annual | Updated: Mar 14, 2024 1:55 PM CDT Observation: