1915 AAA Championship Car season

The 1915 AAA Championship Car season consisted of 27 races, beginning in San Diego, California on January 9 and concluding in San Francisco, California on November 25. The AAA did not award points towards a National Championship during the 1915 season and did not declare a National Champion. Ralph DePalma won the International 500 Mile Sweepstakes.

Earl Cooper was named the de facto National Champion by the American automobile journal Motor Age. Points were not awarded by the AAA Contest Board during the 1915 season. Cooper was named champion by Chris G. Sinsabaugh, an editor at Motor Age, based on merit and on-track performance. A points table was created retroactively in 1927. Historians later recognized that these championship results should be considered unofficial.