Sharks general manager Doug Wilson announced Jones' deal on Saturday, via NHL.com:
"We're very happy we could get this extension done with Martin and feel that he is just beginning to hit his peak in terms of growth and prime playing seasons. He has proven that he is more than capable of excelling in high-pressure situations and big games, and we feel he has become one of the top goaltenders in the League. He is a calming influence in net for our team and we're excited to have him in net for us for the foreseeable future."
TSN Hockey's Pierre LeBrun reported Jones' extension with the Sharks has an average annual value of $5.75 million.
The 27-year-old finished seventh with a 2.27 goals against average during the 2015-16 season. His performance dipped slightly last season with a 2.40 goals against average and 91.2 save percentage, but he still finished seventh with 35 wins.
The Sharks have been a model of consistency with 13 playoff appearances in the last 14 seasons. Jones was team's No. 1 goalie two years ago when they reached the Stanley Cup Final for the first time in franchise history.