The Green Bay Packers defeated the Kansas City Chiefs in the American football championship game now known as Super Bowl I.

The Green Bay Packers is a professional American football team based in Green Bay, Wisconsin. The Packers compete in the National Football League (NFL) as a member of the National Football Conference (NFC) North division. They are the third-oldest franchise in the NFL, established in 1919, and are the only non-profit, community-owned major league professional sports team based in the United States. Since 1957, home games have been played at Lambeau Field. They hold the record for the most wins in NFL history.

The Kansas City Chiefs are a professional American football team based in Kansas City, Missouri. The Chiefs compete in the National Football League (NFL) as a member of the American Football Conference (AFC) West division.

Below is a list of professional football Championship Games in the United States, involving:

• the informal western Pennsylvania professional football circuit ;
• the 1902 "National" Football League and the World Series of Professional Football ;
• the Ohio Independent Championship ;
• the New York Pro Football League ;
• the American Professional Football Association and the National Football League ;
• the All-America Football Conference ;
• the American Football League ;
• the World Football League ;
• the United States Football League ;
• the XFL (2001);
• the United Football League (2009–2011);
• and any inter-league challenge games that included at least one champion of a major, or borderline-major, league.

The first AFL–NFL World Championship Game was an American football game played on January 15, 1967, at the Los Angeles Memorial Coliseum in Los Angeles, California. The National Football League (NFL) champion Green Bay Packers defeated the American Football League (AFL) champion Kansas City Chiefs by the score of 35–10.