The 31-year old leads Islanders' defenceman with 32 points and 25 assists. He has set new career highs in points and assists as well as seven goals in his first season with the team.
The Edmonton, Alta., native has spent 9 seasons in the NHL.
“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.”
Boychuk commented on the deal over his twitter account.
“Ever since I came to the Islanders, the organization has been incredible to both myself and my family,” Boychuk said in a statement released by the Islanders. “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.”
Boychuk was acquired from the Bruins Oct. 4, 2014. He won the Stanley Cup with Boston in 2011. In 380 NHL games he has racked up 107 points. He's played in 79 Stanley Cup playoff games earning 27 points.