More: BBC SportNewcastle's stadium name will revert to St James' Park after the Premier League club agreed a four-year sponsorship deal with a loan company.
Wonga will become the club's main shirt sponsor from next season, replacing Virgin Money, and will also invest Â£1.5m in the club's academy.
The firm also purchased the stadium naming rights and decided on a return to the traditional name.
The stadium had been called the Sports Direct Arena since November 2011.
"We listened over the last three days and we saw what really matters to the fans," a Wonga spokesman said.
"Football is an emotional sport and it is obviously really important to them.
"We listened to what they wanted and that is why we did it."
Prior to the announcement, Football Association general secretary Alex Horne expressed some concern that the deal was with a loan company.