Sharon Day/Johnson is missing and believed to be in the Scarborough area.
She has black shoulder length hair, a slim build and is approximately 5ft4.
She was last seen wearing a black hoodie, denim jeans, grey velvet-style converse trainers and may be wearing a big black jacket.
Scarborough police have issued a high risk missing person appeal.
Anyone who has seen Sharon please call 101 and quote job number NYP-13042018-0045.