An Auckland teenager has been missing for almost two weeks.

Talia-Rose Ngapera, 16, was last seen in Manurewa on August 30 and hasn't been heard from since.

Police are concerned for her welfare because of her age, Counties Manukau Police said.

She is described as being 163cms tall, of slim build, with long dark hair that she sometimes wears in a bun.

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The New Zealand Missing Report website said Talia-Rose left her cell phone at home and has made no contact with her family.

"They are growing increasingly concerned for her well being," the post read.

She may be in the Mangere area, but could also be in Auckland or Northland.

Anyone who knows of Talia-Rose's whereabouts or has any information that could help find her, is asked to contact Counties Manukau Police on (09) 261 1300 or anonymously contact Crimestoppers on 0800 555 111.