The winning ticket, made up of $8m from Powerball First Division and $500,000 from Lotto First Division, was sold at Western Heights Foodmarket in Rotorua.
Rotorua's newest millionaire was the fourth Powerball winner of the year, with the win coming just two weeks after a player from Te Aroha bagged $4.5m.
The other wins came on January 2, when players from Twizel and Te Anau took home $2.83m.
The other winner from Wednesday night won $500,000 in the Lotto First Division.
The winning ticket was sold at Valley Road Superette in Auckland.
Anyone who bought a winning ticket is encouraged to write their name on the back of their ticket and check it at any Lotto NZ outlet, online at MyLotto.co.nz or through the Lotto NZ App.
Alternatively, customers can phone Lotto NZ on 0800 6956886.