The Italy defender missed almost the entire second half of last season having undergone knee surgery in January, returning only for the Hammers’ final Premier League game of the campaign in a 2-1 win at Burnley.
“I’m really grateful for this new deal,” Ogbonna told West Ham’s website. “Our position last year was quite high and we are looking forward to improving next season.
“My target is that I can’t wait to get back playing. I think we have a long season ahead and for me my target is to be better than last season. We finished in 11th position but very close to eighth position and we know we can do better than what we did last year.
“I am excited to show my quality on the pitch and the support is always amazing, even when I had my injury. We have got lots of experience in the team at the moment, which is very good.”
Fit-again Obgonna will now bid to secure his place in Slaven Bilic’s side during West Ham’s pre-season tour to Austria, Germany and Iceland this summer.