Frances Madigan is described as a white Irish woman, 5ft 6ins, who wears glasses and has auburn hair.
When last seen, she was wearing a blue anorak, black trousers, black leather boots and was carrying a black shoulder bag.
Police are appealing for help finding a 75-year-old pensioner who has gone missing from her home in Hornsey.
Frances Madigan left home in Carysfort Road, N8, to go shopping at about 2:00pm on Friday 15th February.
Officers are becoming increasingly concerned for her welfare as Mrs Madigan has dementia and requires medication.