Below is a list of professional football Championship Games in the United States, involving: Prior to 1920, no national professional football league existed, and play was scattered across semi-pro and professional leagues in the upper midwest.
The Ohio League and New York Pro Football League were two prominent regional associations in the 1910s (the NYPFL held an actual championship game in 1919).
The APFA also had no official Championship Games before it changed its name to the NFL in 1922.
Boston/Washington Redskins owner George Preston Marshall, who credited with significant innovations by the NFL, convinced the NFL in 1933 to play a Championship Game between the two Division winners following the success of the 1932 Playoff Game.
Thus, 1933 was the year of the first national professional football Championship Game in the United States.