Clark County, Missouri
Your guide to voting in Clark County, Missouri: registration, sample ballots, ID requirements and where to get local help. Home to about 6,620 people, Clark County ranks 102nd 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
Every eligible adult in Clark County, Missouri holds the same power on Election Day: one vote that counts exactly as much as anyone else's. The next election for Clark County voters is Missouri's state primary on August 8, 2028; local elections can come sooner, so check your local election office. Many Clark County jobs are in retail and restaurants and hospitality, so decisions about local businesses and tourism and small businesses hit close to home.
About 3,330 people voted for president in Clark County in 2024 (down about 2% from 3,390 in 2020). That equals roughly 64% of the county's estimated 5,230 adults, above the statewide rate of about 61%.
That means roughly 1,890 adult residents did not cast a presidential ballot. Some are not eligible, but many are, and that is a lot of untapped power. If just one in 20 of them voted, Clark County would add about 95 voices, more than enough to decide a close local race.
Clark County is rural, with about 13 people per square mile across 505 square miles, so every vote carries extra weight in local races. The county is home to about 0.1% of Missouri's population.
ZIP codes in or partly in Clark County include 63430, 63432, 63435, 63445, 63453, 63465, 63466 and 63472, plus 1 more. Check that your registration is current, look up your sample ballot, and make a plan to vote. Then ask a friend or family member in Clark County to do the same.
Voter Assistance Resources
Local election help in Clark 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 Clark 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 Clark 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 Clark 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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