Officers are concerned for the welfare of the 69-year-old, who was reported to have last been seen at 9am this morning (Tuesday 10 September), near the entrance to Newstead Woods not far from his home in Tilford Road, Newstead Village.
He is believed to have had his dog with him, a small black dog.
Patrick Kealy is a white Irish man, about 5ft 8ins tall, of medium build with short, curly, scruffy hair. He is thought to have been wearing a black woolly hat, a black jacket, grey top, blue jeans and brown suede boots. He also wears glasses for reading.
Unfortunately police do not have a photo of Mr Kealy.
Anyone who has seen Mr Kealy, or has any information on his whereabouts, is urged to contact Nottinghamshire Police on 101, quoting incident number 525 of 10 September 2019.