Maricopa County Sheriff Joe Arpaio will celebrate his 80th birthday on Thursday.
The sheriff says he has special plans to mark his birthday, but declined to reveal them.
He says he remains in good health and wants to be "the poster boy for senior citizens."
The Republican sheriff has served five terms as sheriff and is seeking re-election in November.
He faces a challenge from retired Phoenix police officer Paul Penzone and Scottsdale police Lt. Mike Stauffer.
Penzone is running as a Democrat, while Stauffer is running as an Independent.