St. Charles County, Missouri
What we have for St. Charles County today, and what is coming.
Basics
- County code (FIPS): 29183
- Land area: 561 square miles
- Population: 405,262
Federal money spent here
Fiscal year 2026: $2.7 billion in federal contracts, grants, loans and other awards for work done in St. Charles County.
Who represents St. Charles County
U.S. Senate (whole state): Josh Hawley (Republican), Eric Schmitt (Republican).
U.S. House districts that include part of this county
| District | Member | Share of county land |
|---|---|---|
| Congressional District 3 | Robert F. Onder, Jr. (Republican) | 60.8% |
| Congressional District 2 | Ann Wagner (Republican) | 39.2% |
State senate districts
| District | Member | Share of county land |
|---|---|---|
| State Senate District 2 | Nick Schroer (Republican) | 52.4% |
| State Senate District 23 | Adam Schnelting (Republican) | 38.5% |
| State Senate District 10 | not matched | 9.1% |
State house / assembly districts
| District | Member | Share of county land |
|---|---|---|
| State House District 102 | Richard West (Republican) | 35% |
| State House District 65 | Wendy Hausman (Republican) | 27.3% |
| State House District 64 | Deanna Self (Republican) | 16.7% |
| State House District 69 | Scott Miller (Republican) | 4.2% |
| State House District 63 | Tricia Byrnes (Republican) | 3.5% |
| State House District 108 | Mike Costlow (Republican) | 2.8% |
| State House District 106 | Travis Wilson (Republican) | 2.7% |
| State House District 103 | Dave Hinman (Republican) | 2.1% |
| State House District 107 | Mark Matthiesen (Republican) | 2.1% |
| State House District 104 | Terri Violet (Republican) | 1.8% |
| State House District 105 | Colin Wellenkamp (Republican) | 1.8% |
Matched by district number using the U.S. Census Bureau 2020 county–district relationship files (land area overlap; districts may have been redrawn since). Your exact district depends on your address: U.S. House · state legislators.
County government
Find the official county website and contacts in the USA.gov local government directory or the National Association of Counties explorer.
Sources: U.S. Census Bureau Gazetteer (county list, public domain); USAspending.gov (U.S. Treasury). Built 2026-11-03 15:28.