A breakdown of the results from the by-lection in Te Tai Tokerau shows more support in the north of the electorate for the winning candidate, Hone Harawira.
The Mana Party leader and former Maori Party MP won the seat on Saturday with a majority of 867 votes over the Labour candidate, Kelvin Davis.
Mr Harawira had his strongest showing in Northland, where he won at a majority of polling booths.
Labour fared better in the Auckland parts of the electorate, though the results in West Auckland were close.
Preliminary results put the voter turnout at just over 41% which compares to 36% in the recent Botany by-election, and 55% in Mana.
The low turnout has prompted the Labour MP, Shane Jones to call for mobile voting booths.
Mr Jones says the Maori seats will not survive unless there's a consistently high turnout.
He says there were several hundred potential voters at the dawn launch of a replica Maori village at Te Hana on Saturday morning, who could've benefited from a mobile booth.