The Ravens rejoiced in a confetti-covered Superdrome after narrowly snatching the title from the San Francisco 49ers, who had staged a remarkable second-half comeback following the stadium's 34-minute power cut.
The 49ers head coach Jim Harbaugh slammed key decisions made by the referees after his team lost 34-31.
He questioned two non-calls in the final series when the 49ers failed to convert with a first and goal as they looked to find receiver Michael Crabtree with the game on the line.
"There's no question in my mind that there was a pass interference and then a hold on Crabtree on the last one," he said.
He was also unhappy officials did not call holding as Ravens punter Sam Koch took a safety and protested the decision to penalise cornerback Chris Culliver for pass interference.
Unusually, Harbaugh's older brother John is the head coach of the Ravens, and the siblings - whose parents attended the game together - shared an awkward hug after the tense game.
Victor John paid tribute to his younger brother after the game:
"There is no greater coach or competitor in the National Football League than Jim Harbaugh. The way the team played proves it. What they have done the last two years is unprecedented."
He went on: "They showed it today, the way they battled back and fought right to the end. That is who he is and who they are. I could not be more proud of him and what he has done."