In Washington, D.C., you can register to vote in person at several voter registration agencies. You can also register by mail or online through the D.C. Board of Elections website. You must change your party affiliation at least 30 days before the primary election.
There are several requirements you must meet in order to register to vote in the District of Columbia. You must be a U.S. citizen, and you must have resided in the District for at least 30 days prior to the election. You cannot be registered to vote in any other state or territory. You must be at least 17 years old, and you must turn 18 on or before the date of the next general election. You cannot register to vote if you are in prison for a felony or if you have been found legally incompetent to vote.
If you have already registered to vote in Washington, D.C., and you want to change your party affiliation, you can update your registration information by mail, online or in person. If you request to change your party affiliation within the 30 days prior to the primary election, the request is not be processed until after the primary election.