Washington County, Missouri
Your guide to voting in Washington County, Missouri: registration, sample ballots, ID requirements and where to get local help. Home to about 23,600 people, Washington County ranks 47th 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
Why does voting matter in Washington County? Because every eligible voter here has exactly the same power at the ballot box: one vote. The next election for Washington 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.
Washington County voters cast about 10,200 ballots for president in 2024, up about 3% from 9,980 in 2020. Compared with the county's roughly 18,600 adult residents, that works out to about 55%, below the statewide rate of about 61%.
That means roughly 8,410 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, Washington County would add about 420 voices, more than enough to decide a close local race.
With about 31 residents per square mile over 760 square miles, Washington County is a place where neighbors often know their local officials. The county is home to about 0.4% of Missouri's population.
ZIP codes in or partly in Washington County include 63020, 63023, 63030, 63060, 63071, 63080, 63622 and 63624, plus 10 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 Washington County to do the same.
Voter Assistance Resources
Questions about voting in Washington 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 Washington 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 Washington 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 Washington 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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