🗳️ Register to Vote

Register to Vote in St. Louis County, MO

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

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Voter registration in St. Louis County isn't handled by the County Clerk

In St. Louis County, voter registration is handled by the St. Louis County Board of Election Commissioners, not the County Clerk. Contact that office to register or to check where you are registered. The office is named here from the Missouri Secretary of State's local election authority data (countyinfo.json, undated; read 2026-09-23), not from a page of its own.

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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 County Clerk — useful for other services.

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Office Address

105 South Central Avenue, Clayton, MO 63105

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Phone

314-615-8029

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Hours

Monday through Friday 8:00 A.M. to 5:00 P.M.

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Official Website

County Clerk page · stlouiscountymo.gov ↗