eToro is the world's leading social investment network, with over 20 million registered users worldwide.
It offers its users access to a wide selection of investment instruments, making it simple to invest in stocks, cryptoassets and commodities with confidence.
Newcastle United head of commercial, Dale Aitchison said: "eToro is a brand that lots of supporters will already be familiar with, having become a tried, tested and trusted global investment platform.
"We are delighted to announce our new partnership and we look forward to working together on a range of initiatives across the new season."
eToro's global sponsorships manager, Dylan Holman said: "We are delighted to have partnered with Newcastle United for the new season.
"As a global, multi-asset investment platform, we want to open up financial markets to everyone and make investing simpler and more accessible.
"Through our partnership, we look forward to working with the club’s incredible supporters – introducing them to eToro and helping them to get closer to their team."
As a partner of Newcastle United, eToro will gain global exposure through an extensive range of marketing opportunities including matchday LED boards, media backdrops and digital rights.