The contract will extend through the 2018 season, continuing Tomlin's eight-season stretch as the Steelers' head coach.
Tomlin, 43, is Pittsburgh's 16th head coach, but just the team's third since 1969.
“Mike has proven he is one of the top head coaches in the National Football League, and we are confident he will continue to lead the team in our pursuit of another Super Bowl championship,” Steelers’ president Art Rooney said in a statement.
In his second year in Pittsburgh, Tomlin became youngest head coach to win a Super Bowl in NFL history when the Steelers beat the Arizona Cardinals in Super Bowl XLIII.
“I very much appreciate this contract extension, but my sole focus has been and will continue to be meeting the challenges that lie ahead for the 2015 season,” Tomlin said. “These past nine years in Pittsburgh have been a wonderful experience for my family, and I look forward to pursuing what is the Steelers’ goal every year – bringing another Super Bowl championship to the City of Pittsburgh.”
Last season, the Steelers won the AFC North with a record of 11-5. They lost to the Baltimore Ravens in the AFC Wild Card game.
- Erin Flynn