Home Insurance in St. Charles County, Missouri
With a median home value of $320,800, St. Charles County is 39% higher than the Missouri median.
The typical home in St. Charles County was built around 1994. Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing. About 7% of homes were built before 1960, about 21 points below Missouri's 27%.
The housing stock in St. Charles County is 82% single-family homes, 11% apartments in buildings with 5+ units and 3% mobile or manufactured homes.
71% of owner-occupied homes in St. Charles County carry a mortgage, and mortgage lenders require hazard insurance for as long as the loan is active.
St. Charles County has an owner-occupancy rate of 81% and a vacancy rate of 4%; unoccupied homes typically need a different coverage form.
In St. Charles County, 66% of homes are primarily heated with natural gas.
The top hazards for St. Charles County, per FEMA's National Risk Index, are strong wind (Very High), hail (Relatively High) and tornado (Relatively High).
As of September 2026, St. Charles County has 1,306 active NFIP flood insurance policies. Standard homeowners insurance does not cover flood damage, so flood coverage needs a separate NFIP or private flood policy.
According to the NAIC homeowners insurance report (2023 data), a standard HO-3 homeowners policy in Missouri carries a statewide average premium of $1,589 per year.
Key figures
| Median home value | $320,800 |
|---|---|
| Median year built | 1994 |
| Owner-occupied share | 81% |
| Share of owner-occupied homes with a mortgage | 71% |
| Top hazards (FEMA National Risk Index) | Strong Wind (Very High), Hail (Relatively High), Tornado (Relatively High) |
| Active NFIP flood policies (county) | 1,306 |
| Home insurance premium | $1,589 - statewide average (NAIC, 2023 data) |
Towns and cities
- Augusta
- Cottleville
- Dardenne Prairie
- Flint Hill
- Foristell
- Josephville
- Lake St. Louis
- New Melle
- O'Fallon
- Portage Des Sioux
- St. Charles
- St. Paul
- St. Peters
- Weldon Spring
- Weldon Spring Heights
- Wentzville
- West Alton
Sources
- U.S. Census Bureau Gazetteer Files (2024)
- U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates (2024)
- FEMA National Risk Index (December 2025)
- FEMA OpenFEMA NFIP Redacted Policies v3 (2026)
- NAIC Dwelling Fire, Homeowners Owner-Occupied, and Homeowners Tenant and Condominium/Cooperative Unit Owners Insurance: Data for 2023 (published 2026) (2023)