The Frankford Yellow Jackets were a professional American football team, part of the National Football League from 1924 to 1931, although its origin dates back to as early as 1899 with the Frankford Athletic Association. The Yellow Jackets won the NFL championship in 1926. The team played its home games from 1923 in Frankford Stadium in Frankford, a section in the northeastern part of Philadelphia, noted for the Market–Frankford Line that terminates there.

Throughout its history, the National Football League (NFL) and other rival American football leagues have used several different formats to determine their league champions, including a period of inter-league matchups to determine a true national champion.