'Grave concerns' for woman missing from Macleay Island

Police and family hold 'grave concerns' for a 36-year-old woman reported missing on Macleay Island on Sunday.

Allison Costello was last seen at an address on Cathy Street on Sunday, and is described as Caucasian, 180 centimetres tall with a proportionate build, red hair and blue eyes.

She was last seek wearing a black t-shirt and pink or brown pants.

Police have asked members of the public not to approach Allison but to contact police immediately if sighted or if anyone knows of her whereabouts.