Where to vote in Mount Vernon, Illinois on November 3, 2026
- Election DayTue, Nov 3Tuesday, November 3
- Polls open6 a.m. – 7 p.m.Local time
- Election officeJefferson County618-244-8020 ext. 3
Find your polling place Election office Voting dates
Mount Vernon is in Jefferson County. Mount Vernon has about 14,187 people, by the U.S. Census Bureau's 2025 estimate, which also gives its county lines.
Jefferson County election authority
Jefferson County Clerk
Office: 100 South 10th Street, Room 105, Mt. Vernon, IL 62864
Phone: 618-244-8020 ext. 3
Find your Election Day polling place with the State Board of Elections' Polling Place Locator.
Illinois voting dates for Mount Vernon voters
| Date | What |
|---|---|
| Thu, Sep 24 Started | Mail ballots start going out source |
| Thu, Sep 24 Started | Early voting opens source |
| Tue, Oct 6 Ended | Last day to register by mail or at a registration site source |
| Wed, Oct 7 Started | Same-day registration opens source |
| Sun, Oct 18 | Register online source |
| Mon, Oct 19 | Early voting expands source |
| Thu, Oct 29 | Apply for a vote-by-mail ballot source |
| Mon, Nov 2 | Early voting ends source |
| Tue, Nov 3, 7 p.m. | Election Day: polls open 6 a.m. to 7 p.m. source |
| Tue, Nov 3, 7 p.m. | Register and vote the same day source |
| Tue, Nov 3 | Return your mail ballot source |
Mount Vernon voting questions
Where do I vote in Mount Vernon on Election Day?
At your assigned polling place, or a vote center where Jefferson County uses them. Polls are open 6 a.m. to 7 p.m. local time. Enter your address on the Illinois page to find yours.
What is the phone number of the election office for Mount Vernon?
618-244-8020 ext. 3, the Jefferson County Clerk, 100 South 10th Street, Room 105, Mt. Vernon, IL 62864.
Which county runs elections in Mount Vernon?
Jefferson County. Mount Vernon voters register and vote with Jefferson County.
More for Mount Vernon voters
- Illinois voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Jefferson County election office: address and phone.
- Who is on the Illinois ballot, race by race.
- What's on my ballot and where do I vote, from your street address.
- Voting in every major U.S. city.
Other big cities in Illinois: Chicago, Aurora, Naperville, Joliet, Rockford, Elgin, Springfield, Peoria.
Office details are from the Illinois State Board of Elections, Election Authorities (checked October 14, 2026). Dates are Illinois's, each linked to its source. Call the office before you go; city population and county lines are from the U.S. Census Bureau.