Mary Taylor, 75, was last seen at around 1.30pm o Friday 24 July 2020 in the Bolton area.
Mary is described as white with blond hair and blue eyes. She is 5ft 2ins tall and of average build.
She often wears bright coloured leggings and a blue/grey jacket which is a few sizes too big.
It is believed that Mary could be in the Swinton area.
Officers are becoming increasingly concerned for Mary and want to make sure she is safe and well.
Anyone with information about Mary’s whereabouts is asked to contact police on 0161 856 5757.