Wairoa's win is the second large Lotto win in the town in the past fortnight.
In late November, a Wairoa Keno player won a Volkswagen campervan valued at more than $80,000 after checking a winning Keno ticket left beside the bed for two weeks.
The player, who wishes to remain anonymous, is a regular Keno player who keeps tickets in a jar beside the bed.
The winning ticket, also sold at Mobil Wairoa, was for a Keno promotion drawn on November 7.
"After the Keno promotion was drawn I heard that someone in Wairoa had won the Volkswagen campervan and wondered whether it could be me," the eventual winner said.
"I looked up the winning voucher number and had a quick look through my tickets, but couldn't see the winning number so figured I hadn't been the lucky one."
Earlier this week, the player finally rechecked the winning ticket.
"When I found out the prize still hadn't been claimed I figured it would be worth digging my tickets out and taking them in-store to be checked, just in case I had missed something.
"The operator popped my ticket into the terminal and I heard the winning music play – I immediately knew that my ticket was the one everyone was looking for.
"I jumped up and down with excitement – I was buzzing. I can still hardly believe my luck."
Keno is one of Lotto New Zealand's daily games drawn four times a day at 10am, 1pm, 3pm and 6pm. Players have the chance to win up to $250,000.
Mobil Wairoa manager Harvinder Kaur, also known as Fimar, said a $10,000 Instant Kiwi ticket was also sold a few months earlier.
"It has been really lucky over here," she said.
She said she was happy that the winnings were going to the customers that supported the station.
"We are a really small town, and we are really glad the money is going back to the community," she said.
