The Teeside locals snagged the big win, which will see all of them at least win £4,000 in the jackpot prize.
Others could win up to £370,000 as it all depends on how many people in their area – TS5 7 -have tickets.
Hundreds of residents in Middlesborough recently learned that they lived within the winning postcode – seeing them share the massive prize.
The locals will find out the full postcode on Saturday – seeing them take home the biggest cheque of all on Sunday.
People’s Postcode Lottery ambassador Judie McCourt will be at the event on Saturday to present winners with the good news in person.
She told TeesideLive said: “A massive congratulations to our players in Middlesbrough! I’m really excited to meet many of the winners in person and present them with a prize cheque of their own.
“The community will be buzzing with excitement right now and I can’t wait to celebrate with them on Saturday.”
It’s not usual for people to win big in the Postcard Lottery.
Six neighbours last month managed to nab £30,000, while others revealed they were going to do with their £70,000.