Marvin Eugene "Tony" Bettenhausen (born September 12, 1916 in Tinley Park, Cook County, Illinois, United States – died May 12, 1961 in Indianapolis, Marion County, Indiana, United States) was an American racing driver who competed in the Indianapolis 500 rounds of the Formula One World Championship. While he failed to win the event, Bettenhausen was the only driver to start all of the eleven races that counted towards the championship (Paul Russo entered all eleven, but only started eight).