Friday is the last day to apply for voter registration in order to vote in the Aug. 26 runoff primary, election officials announced Monday.

Persons who are United States citizens, residents of Oklahoma and at least 18 years old may apply to become registered voters.

Persons who have never been registered to vote before or who are not currently registered and persons who are registered but who need to change their registration information may apply by filling out and mailing a voter registration application form. The form must be postmarked by midnight Friday.

Applications postmarked after that time still will be accepted and processed, but the applications will not be approved until after Aug. 26.

Election officials respond in writing to individuals who submit an application. The response includes a voter identification card listing the new voter's precinct number and polling place location.

Applicants who do not meet qualifications will receive a letter that explains the reason or reasons the application was not approved.

Any person who has submitted a voter registration application and who has not received a response with 30 days should contact the county election board within the county they reside.

Application forms are available at the county election board office and at most post offices, tag agencies and public libraries.

Applications also are available on the Internet at www.elections.state.ok.us.