Natalia Karaczyn is missing from her home in Crozon Park since early Sunday morning.
She is described as being 5'8" in height, slim build with green eyes and medium length straight blonde hair.
When she last seen, Karaczyn was wearing a black lace body suit, black leather trousers, black jacket and black open-toe sandals.
Investigating Gardaí are also appealing for information in relation to the movements of a beige Peugeot estate car 308, partial registration number 09 DL on Sunday morning in the Sligo area.
Gardaí in Sligo said they are concerned for Natalia's safety.
They've asked that any persons who can assist with the investigation should contact Sligo Garda Station on 071 - 9157000, the Garda Confidential line 1800 666 111 or any Garda Station.
