Police are calling for public help to find a 12-year-old girl who went missing from a home in NSWs far north coast.

Aaliyah Winnett was last seen leaving a property on Blue Waters Cres, Tweed Heads West, on July 7.

Police say family had been in contact with her via mobile phone since then but she failed to return home and was reported missing to officers from the Tweed-Byron Police District on July 16.

Police have since launched an investigation into her whereabouts, and both authorities and family have concerns for her welfare.

Aaliyah is described as being of Aboriginal or Torres Strait Islander appearance, between 150 and 160cm tall, of thin build, with long brown hair and green eyes.

She was last seen wearing a white T-shirt, black jumper with a grey pattern, grey tracksuit pants with a red and blue stripe and black Vans sneakers.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000.

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Tweed Heads: Appeal to find 12-year-old Aaliyah Winnett - NEWS.com.au