The 2014 Detroit Lions season was the franchise's 85th season in the National Football League (NFL), their 81st as the Detroit Lions and the first under a new coaching staff led by head coach Jim Caldwell. The Lions suffered the passing of long-time owner William Clay Ford Sr., who died on March 9, 2014, at the age of 88, and wore patches with his initials on their jerseys in his honor. After the Philadelphia Eagles lost to the Washington Redskins in Week 16, the Lions clinched a playoff berth for the first time since 2011. They lost to the Dallas Cowboys in the Wild Card Game 24–20, ending their season. It was their eighth straight playoff loss, tying the Kansas City Chiefs for the longest postseason losing streak in NFL history.

The 2014 NFL season was the 95th season in the history of the National Football League (NFL) and the 49th of the Super Bowl era. The season began on Thursday, September 4, 2014, with the annual kickoff game featuring the defending Super Bowl XLVIII champion Seattle Seahawks hosting the Green Bay Packers, which resulted with the Seahawks winning. The season concluded with Super Bowl XLIX, the league's championship game, on Sunday, February 1, 2015, at University of Phoenix Stadium in Glendale, Arizona, with the New England Patriots defeating the Seahawks, in one of the closest games in Super Bowl history.