are 6:00 a.m. to 8:00 p.m. Tuesday, October 16th is the last day to register to vote in New Jersey. NJ residents can register to vote at government-approved locations by Tuesday or have your application mailed and postmarked by Tuesday, Oct. 16. The deadline to apply for a Mail-In-Ballot by mail is Oct. 30. You may apply in person up until 3:00 p.m. on Nov. 5. Vote by Mail.