Fran Tarkenton's Vikings tasted Super Bowl defeat for the fourth time. (AP)
The Raiders won their first NFL championship before a record Super Bowl crowd plus 81 million television viewers, the largest audience ever to watch a sporting event.
The Raiders gained a record-breaking 429 yards, including running back Clarence Davis's 137 rushing yards.
Wide receiver Fred Biletnikoff made four key receptions, which earned him the game's most valuable player trophy. Oakland scored on three successive possessions in the second quarter to build a 16-0 halftime lead.
Errol Mann's 24-yard field goal opened the scoring, then the AFC champions put together drives of 64 and 35 yards, scoring on a 1-yard pass from Ken Stabler to Dave Casper and a 1-yard run by Pete Banaszak.
The Raiders increased their lead to 19-0 on a 40-yard field goal in the third quarter, but Minnesota responded with a 12-play, 58-yard drive late in the period, with Fran Tarkenton passing eight yards to wide receiver Sammy White to cut the deficit to 19-7.
Two fourth-quarter interceptions clinched the title for the Raiders. One set up Banaszak's second touchdown run, the other resulted in cornerback Willie Brown's Super Bowl-record 75-yard interception return.