Warren County, Iowa
Everything a Warren County, Iowa voter needs in one place: registration, voter ID, absentee and early voting, and your sample ballot. Home to about 56,300 people, Warren County ranks 11th in population among Iowa's 99 counties. In Iowa, the county auditor is the county's commissioner of elections and handles registration, absentee ballots and polling places.
Next Election
June 6, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register online or by mail at least 15 days before an election; you can also register in person, including on Election Day.
Why Voting Matters
Voting is how Warren County residents shape the decisions made in their name. The next election for Warren County voters is Iowa's primary election on June 6, 2028; local elections can come sooner, so check your local election office. With retail and health care among the county's biggest employers, issues like local businesses are decided by the officials voters choose.
About 32,700 people voted for president in Warren County in 2024 (up about 5% from 31,000 in 2020). That equals roughly 76% of the county's estimated 43,200 adults, above the statewide rate of about 65%.
Put another way, about 10,500 adults in Warren County sat that election out. Not all of them can vote, but if even 5% of them did, that would be roughly 527 more ballots, often more than the margin in races for local councils, school boards, the legislature or Congress.
With about 99 residents per square mile over 570 square miles, Warren County is a place where neighbors often know their local officials. The county is home to about 1.7% of Iowa's population.
ZIP codes in or partly in Warren County include 50001, 50033, 50047, 50061, 50118, 50125, 50139 and 50145, plus 15 more. Confirm your registration, read through your sample ballot before Election Day, and choose whether you will vote early, by mail or in person. Invite someone you know in Warren County to join you.
Voter Assistance Resources
Who runs elections in Warren County? In Iowa, the county auditor is the county's commissioner of elections and handles registration, absentee ballots and polling places. For registration, polling places, early voting and absentee ballots, contact the Warren County auditor.
Direct link, Iowa Secretary of State county auditor contact page:
https://sos.iowa.gov/elections/auditors/auditor.asp?CountyID=91&btnGo=Go
Statewide directory, Iowa Secretary of State's county auditor list:
https://sos.iowa.gov/elections/voterinformation/index.html
See your sample ballot. Iowa Secretary of State general election page (sample ballots come from your county auditor):
https://sos.iowa.gov/general-election
You can also preview a personalized ballot at Vote411.org.
To ask a question or report a problem at the polls, call or text Election Protection at 866-OUR-VOTE (866-687-8683), a free nonpartisan hotline. For help in Spanish call 888-VE-Y-VOTA (888-839-8682); for Asian languages call 888-API-VOTE (888-274-8683).
Voters with disabilities in Warren County can ask for an accessible voting machine, curbside voting where offered, and help from a person of their choice. If you run into barriers, contact Disability Rights Iowa, Iowa's Protection and Advocacy agency, at (800) 779-2502. VoteRiders (844-338-8743) offers free help with voter ID.
Need a ride? Many local transit agencies and ride services offer free or discounted rides to the polls on Election Day, so check what is available before the next election. See our Iowa voter page for statewide options. Details can change, so confirm with the official election office.
Military and overseas voters can get help from the Federal Voting Assistance Program at 1-800-438-VOTE (8683) or fvap.gov.
Sign up to be an election worker
Election workers (often called poll workers) keep voting running smoothly in Warren County. Most are paid for their time, get free training, and help their neighbors cast their ballots. You can work a full day, a shorter shift, or help before Election Day. County and municipal election offices recruit and train their own workers, and the EAC's Help America Vote page links to yours. Find out how to sign up:
https://www.eac.gov/help-america-vote
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