Voter Registration Information

Where to Register

You can register to vote at any of the following sites:
  • Election Authority Office
  • Vehicle Registration Offices
  • State Offices Providing Public Assistance
Mail-in registration forms are available at the following sites:
  • Public Schools
  • Community College
  • Libraries 
  • City Halls

Moving Within the County

If you have moved from one address to another address within St. Charles County, you can change your registration record on the same form that is used for an original registration. In addition, you may also complete the back of your Voter ID Card and mail it to the Election Authority. Alternatively, a registered voter may change his or her address by mailing or faxing written notification to the Election Authority. This notice should include the voter's name, registered address, date of birth and signature.

Name Change

You must notify the Election Authority in writing or in person. A person may vote one time only under a previous name.

Timeline to Vote

If you are in Missouri, you can register to vote as soon as you arrive. However, you cannot vote unless you registered on or before the fourth Wednesday prior to the election.

Deadline to Register

The registration deadline is the fourth Wednesday prior to an election.


A person may vote at any election who:
  • Is a citizen of the United States and is 18 years of age or older
  • Has been a resident of the state and of the election district, in which the person seeks to vote, for at least 28 days prior to the election
  • Has registered before the election registration deadline
  • Is not registered to vote in another jurisdiction

Convicted Felon

Even though you have served your time and are on probation, a convicted felon may not register to vote unless discharged from custody.

Registering Age

You can register at 17.5 years old, but you must be 18 on or before election day in order to vote.

Precinct & Polling Place Location

Your precinct number and polling location are shown on your Voter Notification Card. You may also call the Election Authority at 636-949-7550 or utilize the polling place search.

Power of Attorney

Each person must sign or make a mark on an application when registering to vote or voting. No one can do this for someone else.

Voter Record

Portions of your voter record are confidential, such as your social security number and phone number. Missouri residents do not register by party, and, therefore, it is not public information and is not printed on any voter list. However, to vote in a party primary election, Missouri registrants must state a party preference prior to receiving a ballot.