The Creek County Sheriff's Office said a Silver Alert has been issued for Gary Moser.
Moser was last seen near South 337th West Avenue and East 740 Road in Bristow. Moser is a 72-year-old male possibly wearing a denim shirt, blue jeans, and a tan ball cap.
The sheriff's office said Moser has dementia and doesn't have a phone. They said he drives a white 1997 Ford Ranger with the license plate "EJS553."
They said the vehicle also has a large yellow scrape or dent in the driver's door.