Cass County, Missouri
Voting in Cass County, Missouri? Find registration links, ID rules, early and absentee voting options and your sample ballot here. Home to about 114,000 people, Cass County ranks 10th 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
In Cass County, the people who show up to vote decide who represents everyone. The next election for Cass County voters is Missouri's state primary on August 8, 2028; local elections can come sooner, so check your local election office. Many Cass County jobs are in retail and health care, so decisions about local businesses and health care costs hit close to home.
In the 2024 presidential election, about 59,300 ballots were cast in Cass County, up about 3% from 57,400 in 2020. With roughly 88,600 adults living in the county, that is around 67% of adult residents, above the statewide rate of about 61%.
Put another way, about 29,300 adults in Cass County sat that election out. Not all of them can vote, but if even 5% of them did, that would be roughly 1,460 more ballots, often more than the margin in races for local councils, school boards, the legislature or Congress.
Across about 697 square miles, Cass County averages around 163 people per square mile, mixing neighborhoods, towns and open land. The county is home to about 1.8% of Missouri's population.
ZIP codes in or partly in Cass County include 64012, 64034, 64040, 64061, 64070, 64078, 64080 and 64082, plus 12 more. Take two minutes to confirm your registration, preview your ballot with the links on this page, and decide when and how you will vote. Bring a neighbor along.
Voter Assistance Resources
Local election help in Cass 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 Cass 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 Cass 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 Cass 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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