Oklahoma residents who want to vote in the June 24 primary election have until Friday to register.
Voter registration forms are available at each county election board, post offices, tag agencies and libraries, or can be downloaded from the Oklahoma State Election Board website.
Residents who wish to vote must either register in person or have their applications postmarked before Friday's deadline.
Oklahoma has a closed primary system, where Republicans and Democrats can only vote for candidates of their particular party.
When registering to vote, individuals can select Republican, Democrat, No Party (Independent) or write in a political party. If the written-in party is not recognized in Oklahoma, that voter is registered as an independent voter.