Friday, October 11 is the last day to apply for voter registration to be eligible to vote in the November 05, 2024, General Election, Stephens County Election Board Secretary Shawnda Seely said today. Seely said that persons who are United States Citizens, residents of Oklahoma, and at least 17 ½ years old are eligible to apply for voter registration. However, you must be at least 18 years old to vote.