The premium sportswear brand, which became the Magpies' technical partner last summer, will open the store in 2022 - adding to the St. James' Park retail outlet and impressive online store, as well as its own Castore store in Newcastle city centre.
Founded in 2015 by brothers Tom and Phil Beahon, Castore was created to bring a new level of performance to sportswear.
Tom and Phil's vision is to build Castore into a brand that is focused on premium sportswear and respected across the globe for its innovation and performance within the market.
Commenting on the announcement, Castore co-founder Tom Beahon said: "After a successful few months trading in the new stadium store at St. James' Park, Castore is very excited to expand our Newcastle United retail portfolio by announcing our second NUFC store, which is opening in the MetroCentre.
"We have been warmly welcomed by the fans and the city of Newcastle, and we're looking forward to the latest expansion within the area."
After launching its partnership with Rangers FC in 2020, Castore's portfolio has grown significantly, with the addition of Newcastle United, Wolverhampton Wanderers, McLaren Formula 1 and England Cricket.
Castore is also partnered with a number of top-tier athletes, including Grand Slam tennis champion, Andy Murray, England rugby union captain Owen Farrell, England cricketer Jos Buttler, and multiple gold medal-winning Olympic swimmer and world record holder, Adam Peaty.
In addition to the new Newcastle United store at the MetroCentre, Castore has 13 stores throughout the UK, with plans to open a further 15 sites in 2022.