Information on Voting in Jefferson County
Early Voting Options
If you expect that you will meet one of the qualifications for absentee voting (listed below), you can vote absentee in person OR by mail before election day. Jefferson County residents who will not be able to go to their polling place on Election Day may vote absentee beginning six weeks prior to an election.
If you'd like to vote absentee by mail, you'll need to request an absentee ballot on the County Clerk site HERE.
If you'd like to vote absentee in person, you do not need to complete an application. Simply visit the County Clerk's Office (729 Maple Street, Hillsboro) and sign the Poll Pad to confirm your eligibility.
Must Bring Photo ID: Missouri Driver's License, Passport or Military ID
Reasons for Voting Absentee
- Absence on Election Day from the jurisdiction of the election authority in which such voter is registered to vote
- Incapacity or confinement due to illness or physical disability, including a caregiver who is primarily responsible for the physical care of a person who is incapacitated or confined due to illness or disability
- Religious belief or practice
- Employment as an election authority, as a member of an election authority, or by an election authority at a location other than such voter's polling place
- Incarceration, provided all qualifications for voting are retained
- Certified participation in the Safe At Home address confidentiality program because of safety concerns.
Check Your Voter Registration
Check your Jefferson County voter registration HERE.
Register to Vote
Register to vote online HERE.
*For most accurate information, please be sure to visit the County Clerk's website HERE.
Upcoming Elections
November 3, 2026
General Election
Last day to register to vote - October 7, 2026
Current Candidates
Meet the dedicated individuals running to represent our values and lead Jefferson County toward a brighter future.
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