Cooper County, Missouri
Everything a Cooper County, Missouri voter needs in one place: registration, voter ID, absentee and early voting, and your sample ballot. Home to about 17,100 people, Cooper County ranks 63rd in population among Missouri's 115 counties. In Missouri, elections are run by local election authorities: the county clerk in most counties, or a board of election commissioners in several cities and counties.
Next Election
August 8, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register by the fourth Wednesday before an election.
Why Voting Matters
Voting is how Cooper County residents shape the decisions made in their name. The next election for Cooper County voters is Missouri's state primary on August 8, 2028; local elections can come sooner, so check your local election office. With health care and retail among the county's biggest employers, issues like health care costs are decided by the officials voters choose.
In the 2024 presidential election, about 8,830 ballots were cast in Cooper County, up about 2% from 8,690 in 2020. With roughly 13,700 adults living in the county, that is around 65% of adult residents, above the statewide rate of about 61%.
Put another way, about 4,820 adults in Cooper County sat that election out. Not all of them can vote, but if even 5% of them did, that would be roughly 241 more ballots, often more than the margin in races for local councils, school boards, the legislature or Congress.
With about 30 residents per square mile over 565 square miles, Cooper County is a place where neighbors often know their local officials. The county is home to about 0.3% of Missouri's population.
ZIP codes in or partly in Cooper County include 65018, 65025, 65046, 65068, 65081, 65233, 65237 and 65276, plus 7 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 Cooper County to join you.
Voter Assistance Resources
Who runs elections in Cooper County? In Missouri, elections are run by local election authorities: the county clerk in most counties, or a board of election commissioners in several cities and counties. For registration, polling places, early voting and absentee ballots, contact the Cooper County local election authority (county clerk or board of election commissioners).
Statewide directory, Missouri Secretary of State elections division:
https://www.sos.mo.gov/elections/
See your sample ballot. Missouri Secretary of State elections division (voter lookup shows sample ballots):
https://www.sos.mo.gov/elections/
You can also preview a personalized ballot at Vote411.org.
Free, nonpartisan help is available before and on every Election Day: call or text the Election Protection hotline at 866-OUR-VOTE (866-687-8683). Spanish: 888-VE-Y-VOTA (888-839-8682). Asian languages: 888-API-VOTE (888-274-8683).
Voters with disabilities in Cooper 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 Missouri Protection & Advocacy, Missouri's Protection and Advocacy agency, at (573) 893-3333. 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 Missouri 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 Cooper 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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