The 26-year-old forward has scored 18 points (six goals, 12 assists) in 40 games. He could have become a restricted free agent after the season.
"It's an exciting day for me and my family," Hartman said Friday. "It's the longest deal I've had since my entry level (three years). I've been playing off of one- and two-year deals. I like the camaraderie of this team, this locker room, the direction of this team is heading. A lot of upside. And I think we're just getting started."
Hartman has scored 38 points (15 goals, 23 assists) in 109 games with the Wild since signing a two-year contract July 1, 2019.
"For me, I think I want to build a base with a team and become a part of a core group and be a part of a team for a long time," Hartman said. "… Not that I'm not happy with what we agreed upon. I'm extremely happy. It brings to the same team for another three years and potentially be around here for five years. It's really exciting. I want to be here. I know what this team is capable of and I see a really bright future."
Selected by the Chicago Blackhawks in the first round (No. 30) of the 2013 NHL Draft, Hartman has scored 127 points (57 goals, 70 assists) in 354 regular-season games with the Blackhawks, Nashville Predators, Philadelphia Flyers and Wild. He has scored three points (two goals, one assist) in 17 Stanley Cup Playoff games.
"I think he's shown this year that he can be a guy that is a big part of moving forward and a big part of what we can build here," Wild general manager Bill Guerin said. "He's shown the ability to play center, play wing, kill penalties, playing the power play, he can score, he can fight. He can do a lot of things. Ryan's agent called me a couple months ago and asked if we had interest in doing something like this, and we kind of jumped at. I think the deal is something that is really good for both sides. It gives us cost certainty with one of our players that we really like, and it gives him some term and stability."
Minnesota (29-13-3) is third in the Discover Central Division, 16 points ahead of the fourth-place Arizona Coyotes and 17 ahead of the fifth-place St. Louis Blues. The top four teams qualify for the playoffs.
"[Hartman is] kind of one of the centerpiece guys in this evolving core," Guerin said. "You can tell. He's kind of in the thick of things. He wants to be here. He wants to be part of building something special here. We love that about him. He's just a good guy. He's just an honest hardworking tough kid."
Last season, the Wild were defeated in four games by the Vancouver Canucks in the best-of-5 Stanley Cup Qualifiers. They haven't advanced past the first round of the playoffs since 2015.
"All I want to do really in this league is win," Hartman said. "I think that's everyone's goal. To be honest, money doesn't really matter. It's winning. You can make as much money on your career and if you don't have nothing to show for it, what's the point really in my mind. I saw where this team is heading. I know what this group has and how special it is. I think we're very confident here and that was a big reason of staying around."
The Wild visit the Los Angeles Kings on Friday (10 p.m. ET; NHLN, KCOP-13, BSN+, BSWI+, NHL.TV).
NHL.com independent correspond Jessi Pierce contributed to this report
