Murphy, 28, has become the de facto No. 1 defenseman on a Blackhawks team that has not been strong defensively in recent seasons. But Murphy has been a responsible and physical presence on the blue line.
Murphy had three goals and 12 assists in a career-high 22:09 of ice time last season. He will start his fifth season in Chicago after a trade from Arizona for Niklas Hjalmarsson in 2017.
"When we acquired Connor in the summer of 2017, we had visions of him growing as both a player and leader in our organization for many years," Blackhawks general manager Stan Bowman said in a statement. "He has transformed into a defenseman capable of matching up with the opponent's best players and someone we trust to help us preserve a lead in the final minutes. Connor's voice carries weight in our locker room as a veteran presence and we're thrilled that his development and leadership will continue as a Blackhawk."