1918 Chicago 20 is 185th AAA National Motor Car Championship race. Passed at the Maywood Speedway circuit. Ralph de Palma won the pole position and this race. This was his 17th victory. Dario Resta and Ralph Mulford also climbed to the podium, in second and third place. Race distance 10 laps (32 km).
17th victory for the Ralph de Palma
27th podium for the Ralph de Palma
14th podium for the Dario Resta
30th podium for the Ralph Mulford