Roksana Baran, aged 34, was last seen at the house she shares with her sister in Harrogate at around 8pm on Saturday 18 October 2014.
She has not been in touch with anyone since and officers are becoming concerned for her safety.
The police are urging the public to keep and eye out for Roksana and report sightings of anyone matching her description.
She is described as white, around 5ft 4in tall, with a medium build, shoulder-length, light brown hair and blue eyes.
Anyone who sees Roksana or knows where she is, should contact North Yorkshire Police on 101 – select option 1 – and pass information to the Force Control Room.
Please quote reference number 12140181417 when passing information about Roksana’s whereabouts.