What teams has the most super bowl defeats?

As of October 2023, the teams with the most Super Bowl defeats are the New England Patriots and the Pittsburgh Steelers, each with three losses. The Patriots lost to the New York Giants twice (in Super Bowl XLII and XLVI) and once to the Philadelphia Eagles (Super Bowl LII). The Steelers lost to the Dallas Cowboys (Super Bowl X and XIII) and the Green Bay Packers (Super Bowl XLV).