Police are asking for help identifying a person found dead in water in Auckland's Henderson.

Acting Detective Senior Sergeant Ben Bergin said the body was found in a waterway near Edmonton Road, Henderson just before 10am Saturday.

The death was being treated as unexplained and police were making enquiries to find out what had happened, Bergin said.

Officers had not been able to identify the person, and "We are appealing to anyone who might have information that could assist in identification," Bergin said.

"The deceased is a tall young man of heavy build, with medium-length black hair to below his ears. He is possibly of Polynesian descent.

"He was wearing blue jeans and a light-brown tartan shirt, and the brown boots pictured. He was wearing the ring pictured, on his left hand."

These boots were found with the man's body Photo: Supplied/ Police

Anyone with information about the man was asked to contact police on 105, or online at 105.police.govt.nz, using 'Update Report' and reference 230318/8196.

Or information could be provided anonymously on 0800 555 111.