Where to vote in Sioux City, Iowa on November 3, 2026
- Election DayTue, Nov 3Tuesday, November 3
- Polls open7 a.m. – 8 p.m.Local time
- Election officeWoodbury County712-279-6465
Find your polling place Election office Voting dates
Sioux City is in Woodbury County. Sioux City has about 86,356 people, by the U.S. Census Bureau's 2025 estimate, which also gives its county lines.
Woodbury County auditor's office
Woodbury County Auditor
Office: 620 Douglas St., Rm. 103, Sioux City, IA 51101
Mailing address: 620 Douglas St., Room 103, Sioux City, IA 51101
Phone: 712-279-6465
Regular office hours: Monday to Friday, 8 a.m. to 4:30 p.m.
Website: woodburycountyiowa.gov
Check your registration and find your polling place at the Iowa Secretary of State voter page, the state's voter site.
Iowa voting dates for Sioux City voters
| Date | What |
|---|---|
| Wed, Oct 14 Started | Early voting opens source |
| Mon, Oct 19, 5 p.m. | Pre-register to vote source |
| Mon, Oct 19, 5 p.m. | Request an absentee ballot by mail source |
| Mon, Nov 2 | Early voting ends source |
| Tue, Nov 3, 8 p.m. | Election Day: polls open 7 a.m. to 8 p.m. source |
| Tue, Nov 3, 8 p.m. | Register and vote on Election Day source |
| Tue, Nov 3, 8 p.m. | Return your absentee ballot source |
Sioux City voting questions
Where do I vote in Sioux City on Election Day?
At your assigned polling place, or a vote center where Woodbury County uses them. Polls are open 7 a.m. to 8 p.m. local time. Enter your address on the Iowa page to find yours.
What is the phone number of the election office for Sioux City?
712-279-6465, the Woodbury County Auditor, 620 Douglas St., Rm. 103, Sioux City, IA 51101.
Which county runs elections in Sioux City?
Woodbury County. Sioux City voters register and vote with Woodbury County.
More for Sioux City voters
- Iowa voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Woodbury County election office: address and phone.
- Who is on the Iowa 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 Iowa: Des Moines, Cedar Rapids, Davenport.
Office details are from the Iowa Secretary of State, County Auditor List (checked October 14, 2026). Dates are Iowa's, each linked to its source. Call the office before you go; city population and county lines are from the U.S. Census Bureau.