The 1912 Indianapolis 500-Mile Race, or International 500-Mile Sweepstakes Race, the second such race in history, was held at the Indianapolis Motor Speedway on Thursday, May 30, 1912. Indiana-born driver Joe Dawson won the race, leading only the final two laps. Ralph DePalma dominated the race, leading 196 of the 200 laps, and pulling out to an over 5-lap lead. But with just over two laps to go, his car failed with a broken connecting rod.
The 6th International 300-Mile Sweepstakes Race was the sixth running of the Indianapolis 500. It was held at the Indianapolis Motor Speedway on Tuesday, May 30, 1916. The management scheduled the race for 120 laps, 300 miles (480 km), the only Indianapolis 500 scheduled for less than 500 miles (800 km).
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 18th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Friday, May 30, 1930. The race was part of the 1930 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 13th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Saturday, May 30, 1925.
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 9th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 30, 1921.
The 8th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 31, 1920.
The 5th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Monday, May 31, 1915. The traditional race date of May 30 fell on a Sunday, but race organizers declined to schedule the race for Sunday. The race was set for Saturday May 29, but heavy rains in the days leading up to the race flooded the grounds and made some roads leading to the track impassible. Officials decided to postpone the race until Monday May 31 in order to allow the grounds to dry out. Speedway management would maintain their policy to not race on Sundays until 1974.
The 4th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Saturday, May 30, 1914.
The Third International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Friday, May 30, 1913. Frenchman Jules Goux became the first foreign-born, and first European winner of the Indianapolis 500. His margin of victory of 13 minutes, 8 seconds over second place Spencer Wishart still stands, as of 2023, as the largest margin of victory in Indianapolis 500 history.
