How to get the St. Charles County voter file
Request it from the office below, send us the file, and you're ready to cut turf. Running countywide or in just part of St. Charles County? This is the office either way.
- Where to request it
- St. Charles County Election Authority(636) 949-7550 | [email protected] | 397 Turner Blvd., St. Peters, MO 63376 (Election Authority Office)
- Cost
- No fee published online — St. Charles delivers via email and historically has not charged for standard political-use extracts. Confirm at order time. Governed by RSMo 115.157 / Chapter 610 actual-cost principles if a fee applies.
- How to request
- Email [email protected] with: (1) requester name/organization, (2) scope (countywide or a specific political subdivision such as a city/township/district), and (3) delivery email address. File delivered electronically. Requester is expected to attest to non-commercial use per RSMo 115.157.5 and the County's published policy.
- Turnaround
- Email delivery — typically a few business days from request. Among the fastest jurisdictions in Missouri.
- Use restrictions
- Per the County's published statement: 'Voter registration files are public record and may not be used for commercial purposes.' RSMo 115.157.5 — Class A misdemeanor for commercial misuse. Confidential / Safe-at-Home suppressed.
Costs and rules change, so confirm the current details with the office before you order. Once you have the file, we handle loading it, cutting turf, and getting your volunteers knocking.
Prefer the whole-state file, or running in a county not listed here? See the Missouri statewide options.
St. Charles County at a glance.
St. Charles County had an estimated 423,726 residents in July 2024, the third most populous of Missouri's 115 counties, up 4.6% since the 2020 census. Of those, 331,120 are 18 or older, the voting-age population, and 18.1% are 65 or older. It covers 560 square miles of land (756 people per square mile).
The largest cities and towns are O'Fallon (95,355), St. Charles (72,458), St. Peters (61,398), Wentzville (48,646) and Lake St. Louis (19,160). The American Community Survey (2020-2024) puts it at a median age of 39.8, a median household income of $104,692, 42.7% of adults 25 and older holding a bachelor's degree or higher and 80.5% of occupied homes owned by the people living in them. In 2024, 226,052 votes were cast for president, about 68.3% of the voting-age population; the Democratic ticket took 40.8% and the Republican ticket 57.8%.
The two-party margin moved from R+9.7 in 2008 to R+17.0 in 2024.
- Population (2024 estimate)
- 423,726
- Population (2020 census base)
- 405,265
- Voting-age population (18+)
- 331,120
- Residents 65 and older
- 18.1%
- People per square mile
- 756
- Land area
- 560 sq mi
- Median age
- 39.8
- Median household income
- $104,692
- Adults 25+ with a bachelor's degree
- 42.7%
- Owner-occupied homes
- 80.5%
Largest cities and towns
- O'Fallon 95,355
- St. Charles 72,458
- St. Peters 61,398
- Wentzville 48,646
- Lake St. Louis 19,160
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 40.8% | 57.8% | R+17.0 | 226,052 |
| 2020 | 40.3% | 57.8% | R+17.5 | 222,017 |
| 2016 | 34.2% | 60.6% | R+26.4 | 199,513 |
| 2012 | 38.7% | 59.7% | R+21.0 | 185,597 |
| 2008 | 44.7% | 54.4% | R+9.7 | 188,529 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
Get set up in St. Charles County
Tell us about your race and we'll help you get the St. Charles County voter file loaded into Motion51 and your turf ready to walk.