The 1905 AAA Championship Car season consisted of 11 races, beginning in The Bronx, New York on June 10 and concluding in Poughkeepsie, New York on September 29. There was also one non-championship event in Detroit, Michigan. The AAA National Champion was Barney Oldfield. This was the first year AAA awarded a National Champion and for reasons unknown, they did not award another official champion until 1916. Though not historically considered the first year of the American Championship Car Racing title due to only featuring short sprints on dirt ovals, This was the first time in the western hemisphere that a racing champion was declared based on points.