They bought their lucky ticket at Dairy Flat Foodmart and Liquor.
Although Auckland had the biggest win, Dunedin claimed the crown for the luckiest Powerball town in New Zealand, with two $13 million wins within a month of each other.
A couple from Dunedin won $13.3 million in July last year and then just one month later another Dunedin couple scooped the same amount.
But earlier this week, Lotto revealed the luckiest district in New Zealand was actually Otorohanga in the Waikato.
On average Otorohanga District residents won about $1526 per capita, almost $600 more than the second most prosperous area, Auckland's Rodney Ward.
A ticket sold in the small coastal town of Kawhia in July 2016 helped Otorohanga reach top spot when it proved to be a $13.3m Powerball winner.
The biggest wins in Lotto history:
• $36.8m Big Wednesday prize - Masterton - June 2009
• $28.7m Powerball - Papakura - October 2010
•$27m Big Wednesday prize - Tauranga September 2012
• $33m Powerball prize - West Auckland - September 2013
• $44m Powerball prize - North Auckland - November 2016