St. Charles County
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- Population
- 414,535
- Area
- 560.5 sq mi (1,451.69 km²), 31.92 sq mi water
- Median age
- 39.8
- Households
- 161,311
- Persons per household
- 2.5
- Median household income
- $104,692
- Median house value
- $320,800
Demographics: 2020–2024 ACS
Tonight
62°F
Rain Showers Likely69% precip
Friday
68°F
Chance Rain Showers then Partly Sunny26% precip
Friday Night
50°F
Mostly Clear
Saturday
72°F
Sunny
Local News
City of St. Peters
Published September 29
Lane Closure on Southbound Spencer Road (by the St. Charles City-County Library) Starting Sept. 30
The right southbound lane of Spencer Road (by the St. Charles City-County Library) is expected to close periodically starting Wednesday, Sept. 30, from 7:30 a.m.-4 p.m.
City of St. Peters
Published September 25
Expect Overnight Lane Closures on Mid Rivers Mall Drive and Willott Road for Utility Work
Intermittent lane closures are scheduled from Monday-Friday, Sept. 28-Oct. 2, between 8:30 p.m. and 5:30 a.m. on Mid Rivers Mall Drive and Willott Road.
St. Charles County
Published September 25
Spirits of the Past
City of St. Charles
Published September 24
STC Now October 2026
Read the October 2026 issue of STC Now.
St. Charles County
Published September 24
West Meyer Road to close to through traffic on Sept 30
The St. Charles County Highway Department will close West Meyer Road from Route W to Duenke Road, Wednesday, September 30, 2026.