Monona County, Iowa auditor's office: address and phone for 2026
The Iowa Secretary of State lists the Monona County Auditor at 610 Iowa Avenue, Onawa, IA 51040, phone 712-433-2191. In-person early voting is at this office: it opens Wednesday, October 14 and ends Monday, November 2. Call for its hours.
Monona County auditor's office
Monona County Auditor
Office: 610 Iowa Avenue, Onawa, IA 51040
Phone: 712-433-2191
Regular office hours: Monday to Friday, 8 a.m. to 4:30 p.m.
Website: mononacounty.iowa.gov/Auditor.html
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 Monona County voters
| Date | What |
|---|---|
| Wed, Oct 14, 8:00 AM | Early voting opens In-person absentee voting starts Oct 14 at your county auditor's office. Hours vary by county. source |
| Mon, Oct 19, 5:00 PM | Pre-register to vote Pre-registration closes at 5 p.m. After that, register when you vote, with ID and proof of residence. source |
| Mon, Oct 19, 5:00 PM | Request an absentee ballot by mail Your county auditor must receive your request by 5 p.m. source |
| Mon, Nov 2, 4:30 PM | Early voting ends Last day for in-person early voting. Check your county auditor's hours. source |
| Tue, Nov 3, 8:00 PM | Election Day: polls open 7:00 a.m. to 8:00 p.m. Find your polling place through your county auditor. source |
| Tue, Nov 3, 8:00 PM | Register and vote on Election Day Register at your polling place with ID and proof of residence. Polls are open 7 a.m.–8 p.m. source |
| Tue, Nov 3, 8:00 PM | Return your absentee ballot Your county auditor must receive it by 8 p.m. on Election Day. source |
Monona County voting questions
What is the phone number for the Monona County auditor's office?
712-433-2191, the Auditor (Monona County's auditor's office on the Iowa Secretary of State, County Auditor List).
What is the address of the Monona County auditor's office?
610 Iowa Avenue, Onawa, IA 51040.
When does early voting start in Monona County?
Early voting opens Wednesday, October 14; early voting ends Monday, November 2, 2026. In-person absentee voting starts Oct 14 at your county auditor's office. Hours vary by county.
More for Iowa voters
- Who is on the Iowa ballot: every candidate on the state's official list, race by race.
- Iowa voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Every Iowa county's office.
- Early voting dates in every state.
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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.