The Electoral Commission said the turnout was 65.4 per cent of the 45,955 voters enrolled.
Of all the votes cast, 30.17 per cent or 13,869 votes were advance votes.
The byelection took place after the resignation of Mike Sabin for undisclosed personal reasons.
The Electoral Commission said it expected to return the writ on April 14 showing the successful candidate, assuming there were no judicial recounts.
However that may be delayed by a few days; the lowest polling candidate, Adam Holland, told the Herald he plans to apply tomorrow for a judicial recount.
The final results:
Adrian Paul Bonner, Independent, 17
Joe Carr, Focus New Zealand, 113
Robin Grieve, Act New Zealand, 68
Herbert Maki, Aotearoa Legalise Cannabis Party, 94
Adam Holland, Independent, 16
Mark, Osborne, National Party, 11, 648
Rob Painting, Climate Party, 39
Winston Peters, 16,089
Rueben Taipari Porter, Mana Movement, 60
Willow-Jean Prime, Labour Party, 1380
Brunce Rogan, Independent, 24
Informals 42