The new deal will keep Gohouri with the Latics until the summer of 2013.
The 30-year-old’s agent, Rui Alves, said: “We are delighted with Steve’s new contract with Wigan.
“Roberto and (Wigan chairman) Mr Whelan are fantastic people and this team deserve to be in the Premier League.
“Steve had some contacts to go somewhere else next season, but we decided to stay here and make this club a very good club, with some good signings they can have a great season next year.”
Gohouri joined Wigan on a free transfer from Borussia Monchengladbach in January last year.