Over 59 games this season, Boychuk has recorded 32 points and a +17 plus-minus rating while averaging 21:38 of time on ice.
The deal is worth $42 million, according to Arthur Staple of Newsday.
“Ever since I came to the Islanders, the organization has been incredible to both myself and my family,” Boychuk said in a news release. “I am proud to be an Islander and look forward to competing every night in front of such a passionate fan base for many years to come.”
The Islanders acquired Boychuk in an October 2014 trade with Boston.
“Johnny’s influence in our dressing room, both on and off the ice, has been immeasurable,” Islanders general manager Garth Snow said. “His veteran presence is an asset that we are thrilled to help lead our club.”
The Islanders (32-22-4) currently sit in second place of the Metropolitan Division.
Yes! Yes! Yes! For seven more years!!— Johnny Boychuk (@joboych) March 12, 2015