Police are seeking public assistance to locate missing man John Barratt, who was last seen at his Mount Gambier home at 9am on Monday 29 April.
Mr Barratt is 83 years old, Caucasian appearance, 175cm tall, 85kg and may be driving a silver 2006 Ford Falcon one-tonne ute with South Australian registration of S509AKG.
He may have gone to visit relatives in country Victoria.
Police have concerns for his welfare, and anyone who sees him or his car is asked to call the Police Assistance Line immediately on 131444.