The 37th International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Saturday, May 30, 1953. The event was part of the 1953 AAA National Championship Trail, and was race 2 of 9 in the 1953 World Championship of Drivers.
The 38th International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Monday, May 31, 1954. The event was part of the 1954 AAA National Championship Trail, and was also race 2 of 9 in the 1954 World Championship of Drivers.
The 39th International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Monday, May 30, 1955. The event was race 1 of 11 of the 1955 AAA National Championship Trail and was race 3 of 7 in the 1955 World Championship of Drivers.
The 40th International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Wednesday, May 30, 1956. The event was part of the 1956 USAC National Championship Trail and was also race 3 of 8 in the 1956 World Championship of Drivers. The 1956 race was the first to be governed by the United States Automobile Club. AAA withdrew from auto racing the previous August. Another change would have a more immediate effect on the current race. The track had been paved over with asphalt with only about 600 yards of the main stretch still remaining brick.
The 43rd International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Saturday, May 30, 1959. The event was part of the 1959 USAC National Championship Trail and was also race 2 of 9 in the 1959 World Championship of Drivers.
The 29th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Friday, May 30, 1941. The start of the race was delayed due to a fire that swept through the garage area on race morning. No persons were injured, but one car in the field was destroyed. The race rolled off with only 31 cars, and ran to its scheduled distance. This would be the final "500" prior to the United States involvement in WWII. It was not known at the time, but it would be the final race organized by Speedway president Eddie Rickenbacker, and due to the war, the race would not be held again until 1946.
The 32nd International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Monday, May 31, 1948.
The 27th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on May 30, 1939. The race was won by the number two car of Wilbur Shaw, who started in the third position, driving a Maserati 8CTF. The race was notable for a three car accident on lap 109, when Floyd Roberts, the reigning champion, was killed when his car went through the wooden outer wall at over 100 miles (160 km) an hour at the backstretch. In Louis Meyer's final Indy 500, he too would crash at the backstretch at over 100 miles (160 km) an hour, but he walked away unharmed.
The 26th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 30, 1938. For 1938, riding mechanics were made optional; however, no teams utilized them in the race. In addition, after seven years, the engine specifications were changed again. The 1930 "Junk" formula was eliminated. Normally aspirated engines were allowed 4.5 liters, and superchargers would be permitted again, with a maximum displacement of 3.0 liters. Any fuel was allowed, which directly affected the race.
The 25th International 500-Mile Sweepstakes was held at the Indianapolis Motor Speedway on Monday, May 31, 1937. With temperatures topping out at 92 °F (33 °C), it is one of the hottest days on record for the Indy 500.
The 24th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Saturday, May 30, 1936. The race was part of the 1936 AAA Championship Car season. The race is remembered for three noteworthy Indy traditions getting their start.
The 23rd International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Thursday, May 30, 1935. Despite attempts to improve participant safety by requiring crash helmets and installing green and yellow lights around the track, the event that year would prove to be one of the worst in terms of fatalities.
The 22nd International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on May 30, 1934. The winner was the number seven car driven by Bill Cummings, an Indianapolis native, at an average speed of 104.863 miles per hour. Cummings led for 57 laps total, including the last 26. Of the 33 cars that began the race, only 12 were running at the finish, although there were no crashes resulting in serious injuries. One serious incident involved George Bailey, whose car went over the outside wall, but resulted in only a broken wrist to the driver. The finish was the closest in the history of the race to that point, with second-place finisher Mauri Rose within 100 yards of Cummings at the finish. Rose would also file a protest that Cummings had illegally gained ground during a "slow-down" period following a crash.
The 21st International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Tuesday, May 30, 1933. Louis Meyer defeated Wilbur Shaw by a time of 401.89 seconds. The average speed of the race was 104.162 miles per hour (167.632 km/h) while Bill Cummings achieved the pole position with a speed of 118.521 miles per hour (190.741 km/h). The race was part of the 1933 AAA Championship Car season.
The 15th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 30, 1927.
The 14th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 31, 1926. Louis Chevrolet drove the Chrysler pace car for the start.
The 12th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Friday, May 30, 1924.
The 11th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Wednesday, May 30, 1923. After winning previously in 1921, Tommy Milton became the first multiple winner of the Indianapolis 500. Howdy Wilcox drove relief for Milton in laps 103–151. During the break, Milton had to have his hands bandaged due to blisters, and changed his shoes due to crimping of his toes.
The 10th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Tuesday, May 30, 1922.
The 9th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 30, 1921.
