Ballot by Mail
ballotbymail.org · nonpartisan
ballotbymail.org · nonpartisan
November 3, 2026 general election
Voting by mail in Missouri
Only with a qualifying reason. You need an approved reason, such as travel, illness or disability, age, or work. Check your state's list. If you don't qualify, early in-person voting is usually an option. No-excuse voting is available in person in the two weeks before Election Day. Mailed ballots still need a reason.
Key dates
| Register to vote by | Wed, Oct 7 |
| Mail ballot request received by | Wed, Oct 21, 5 p.m. |
| Early in-person voting | Tue, Oct 20 – Mon, Nov 2 |
| Mail your ballot by | Tue, Oct 27 (USPS: allow 7 days) |
| Election Day | Tue, Nov 3 |
| Return rule | Received by close of polls on Election Day. |
Steps
- Check the excuse list on your state's site. Common ones: away on Election Day, illness or disability, 65 or older, work hours.
- If you qualify, request now and include the reason exactly as the form asks.
- If you don't qualify, look up early in-person voting. It's available in most excuse states.
- When your ballot arrives, fill it out in blue or black ink and sign the envelope.
- Return it the way your state requires and track it until it shows received.
Don't get rejected
- Extra step in your state: a notary must sign the envelope unless you qualify for the no-notary excuses (permanent disability, illness, or being 65+ isn't one; check the form). This is the #1 reason ballots get tossed where it applies.
- Sign the envelope. An unsigned envelope is the most common fixable mistake.
- Use the secrecy sleeve if one is included, then the return envelope. Don't tape anything.
- Keep the phone and email on your registration current. If there's a problem, that's how they reach you to fix it.
Official election office
https://www.sos.mo.gov/elections/goVoteMissouri/howtovote
https://www.sos.mo.gov/elections/goVoteMissouri/howtovote
Track your ballot
https://www.sos.mo.gov/elections/goVoteMissouri/localelectionauthority
https://www.sos.mo.gov/elections/goVoteMissouri/localelectionauthority
This page, with live updates
ballotbymail.org/state/mo
ballotbymail.org/state/mo
Trouble voting? 866-OUR-VOTE (English) · 888-VE-Y-VOTA (Español) · 888-API-VOTE (Asian languages) · 844-YALLA-US (العربية)
Rules checked 2026-09-09; deadlines checked 2026-09-09. Sources: NCSL, Vote.org, CEIR, state election offices. The official site wins if anything differs. Free to copy and post.