St. Charles County, Missouri
St. Charles County, Missouri · ZIP 63301, 63303, 63304
- Census data · ACS 2019-2023
- 423,726 (2024 estimate)Population
- 158,682Households
- $102,912Median household income
- $296,800Median home value
- 18Towns with a page
- 14ZIP codes
St. Charles County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 283,883 |
| 2010 | 360,485 |
| 2020 | 405,262 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 29, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 29, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 29, retrieved November 14, 2026.
Median household income $102,912 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 29, retrieved November 14, 2026.
- Owner occupied
- 128,045 units
- Renter occupied
- 30,637 units
- Vacancy rate
- 3.6%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 29, retrieved November 14, 2026.
143,624 employees in 8,946 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 29, retrieved November 14, 2026.
| Measure | St. Charles County | Missouri |
|---|---|---|
| Population | 409,830 | 6,168,181 |
| Median household income | $102,912 | $68,920 |
| Median age | 39.6 | 38.9 |
| Median home value | $296,800 | $215,600 |
| Bachelor’s degree or higher | 42.4% | 31.9% |
| Foreign-born residents | 4.3% | 4.4% |
| Owner-occupied homes | 80.7% | 67.9% |
| Mean commute to work | 24.9 minutes | 23.7 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 29, retrieved November 14, 2026.
Townships, towns and villages in St. Charles County18 with a page · sort by any column
| Type | |||
|---|---|---|---|
| O'Fallon | City | 95,355 | 31.0 sq mi |
| St. Charles | City | 72,458 | 25.2 sq mi |
| St. Peters | City | 61,398 | 22.5 sq mi |
| Wentzville | City | 48,646 | 22.0 sq mi |
| Lake St. Louis | City | 19,160 | 8.57 sq mi |
| Dardenne Prairie | City | 14,407 | 5.34 sq mi |
| Cottleville | City | 6,378 | 4.74 sq mi |
| Weldon Spring | City | 5,304 | 7.65 sq mi |
| St. Paul | City | 3,725 | 7.21 sq mi |
| Foristell | City | 751 | 6.08 sq mi |
| Flint Hill | City | 561 | 2.85 sq mi |
| New Melle | City | 547 | 1.79 sq mi |
| Josephville | Village | 517 | 2.86 sq mi |
| West Alton | City | 353 | 28.8 sq mi |
| Portage Des Sioux | City | 323 | 0.58 sq mi |
| Augusta | Town | 268 | 1.03 sq mi |
| Weldon Spring Heights | Town | 92 | 0.10 sq mi |
| Defiance | Census designated place | 80 | 1.01 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 29 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across St. Charles County
No job is posted in St. Charles County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in St. Charles County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Calhoun CountyPopulation 4,224 (2024 estimate)
- Franklin CountyPopulation 107,256 (2024 estimate)
- Jersey CountyPopulation 21,150 (2024 estimate)
- Lincoln CountyPopulation 65,888 (2024 estimate)
- Madison CountyPopulation 263,017 (2024 estimate)
- St. Louis CountyPopulation 992,929 (2024 estimate)
- Warren CountyPopulation 38,478 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 17, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 29, retrieved November 14, 2026.