Auckland hapu Ngati Whatua Orakei is calling on its members to take part in a census thought to be the first of its kind in Aotearoa.
The tribal survey is being led by the James Henare Maori Research Centre at the University of Auckland, and is being overseen by the Whai Maia Research Committee.
The committee's chairperson Wayne Pihema said many iwi have trouble getting information about their people from the general census.
He hoped the survey would shed light on what was needed for the hapu's cultural and social development. Mr Pihema said it would also give a better idea of population trends.
He said the census will direct planning in areas like language, education, housing and health.
Mr Pihama said the survey model could be used by other iwi.
People must register with Ngati Whatua Orakei to take part, and have until the end of July to participate.