You can cast your advance ballot in the County Clerk's Office beginning at 8:00 a.m. on Tuesday October 21st. The Clerk's office is located in the Jefferson County Courthouse on the 1st floor. After filling our an application form you can vote your ballot right here in the office. Please bring your photo identification. The office is open from 8:00 a.m. to 4:30 p.m. Monday - Friday.