Patrick Joseph Monaghan was last seen on Dec. 26. around 1:20 p.m. at a Mississauga McDonald's restaurant in the area of Erin Mills Parkway and Millcreek Drive.
Monaghan suffers from mild cognitive difficulties and is from the Toronto Beach area.
He is described as white, five feet seven inches tall, about 170 pounds, with blue eyes and short curly, grey hair. He was wearing a blue bomber-style jacket and speaks with an Irish accent.
Monaghan is driving a 2006 four-door red Jaguar. The Ontario licence plate number is BNHT714.
Police are concerned for his safety and are asking anyone with information to contact them at 55 Division, 416-808-5504 or Crime Stoppers at 416-222-TIPS (8477) or online at www.222tips.com