The 1905 AAA National Motor Car Championship consisted of 11 points-paying races, beginning in The Bronx, New York on June 10 and concluding in Poughkeepsie, New York on September 29. There were also at least two non-championship events held during the year. This was the first year that the AAA Contest Board (then known as the Racing Board) officially recognized a National Champion in American Championship Car competition.
The 1905 AAA National Champion was Barney Oldfield. For reasons unclear, but likely due to a change in attitudes and opinions by AAA officials about the dangers of racing following several serious accidents, no national championship was officially recognized again until 1916.
In 1951, Victor Hémery, winner of the 1905 Vanderbilt Cup, was retroactively awarded a national championship. At a later point, it was recognized by historians that these championship results were revisionist, after discovering published sources naming Oldfield as the National Champion.
^"Considerable and reasonable doubt is raised" (based on coverage in The Motor World) about the Syracuse event being a points-paying race in the 1905 national championship; per research by Don Capps (February 14, 2015).
