🗳️ Register to Vote

Register to Vote in St. Charles County, MO

This service isn't handled by the Registrar. Here's where to go instead.

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Voter registration in St. Charles County isn't handled by the Registrar

In St. Charles County, voter registration is handled by the Election Authority, not the Registrar. Register with that office, or check where you are registered, on its own page. Its number is 636-949-7550.

🌐 Go to the Election Authoritysccmo.org ↗

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What Missouri requires

Verified 2026-07-09 · official state sources

Your voter registration must be postmarked or submitted by the 4th Wednesday before an election — about four weeks out. source ↗
Missouri offers full online voter registration — you can submit your application electronically, or register by mail or in person. source ↗
To vote in person you must show a nonexpired Missouri driver or nondriver license, a U.S. passport, or a military or veteran ID. A registered voter without one may cast a provisional ballot, which counts if they return with a photo ID or their signature is verified. source ↗

📋Office Information

⚠️ This office does not process voter registration. Use the agency linked above. The office below is your county's Registrar — useful for other services.

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Office

Registrar

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Office Address

201 N. Second St., Suite 541, St. Charles, MO 63301

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Phone

636-949-7560

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Hours

Monday - Friday, 8 a.m. - 5 p.m.