Tomlin, 40, was entering the final year of his contract, although the team had an option for 2013. Financial terms of the three-year extension weren’t released, but Tomlin was the sixth-highest paid NFL coach for this season, according to Forbes magazine.
"I am excited that I will continue to be the head coach of the Pittsburgh Steelers for years to come," Tomlin said in a statement. "I am grateful to the Steelers organization for the opportunity I have been given over the past five years to work and live in this great city, and I am excited to continue to work to bring another championship to the Steelers and the city of Pittsburgh."
Tomlin, who is entering his sixth season as the Steelers’ coach, became the youngest coach in NFL history to win a Super Bowl, when he led the Steelers to a 27-23 win over the Arizona Cardinals in February 2009. He also reached the playoffs four times in his first five seasons, including two trips to the Super Bowl.
"We are pleased to announce that Mike Tomlin will remain with the Steelers for at least five more years," Steelers president Art Rooney II said. "Mike is one of the top head coaches in the National Football League and we are thrilled he will continue to lead our team as we pursue another Super Bowl title."