Police and the family of Maureen Gilgan (pictured), are becoming increasingly concerned for her wellbeing.
Maureen, 88, was last seen in the Hopefield Crescent area of Portrush at around 7.15pm on Wednesday 25th January.
She is described as having short, white hair, a pale complexion, and is of a slender build.
When last seen, she was wearing a cobalt blue coloured coat, red corduroy trousers, black laced up shoes, and black metal framed glasses.
She also may have been carrying a red purse in her pocket.
In particular, officers are appealing to local residents who live in the Hopefield Avenue, Hopefield Crescent, Glenvale Avenue and Coleraine Road areas of the town, to check their gardens, sheds, and outbuildings.
Anyone who may have any information which could assist police is asked to call 101, and quote reference number 507 of 26/01/23.