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The closest and largest margins between first and second place in Indianapolis 500 history:
| 0.043 | Al Unser Jr. over Scott Goodyear, 1992 |
| 0.064 | Sam Hornish Jr. over Marco Andretti, 2006 |
| 0.160 | Gordon Johncock over Rick Mears, 1982 |
| 0.299 | Gil de Ferran over Helio Castroneves, 2003 |
| 0.570 | Arie Luyendyk Sr. over Scott Goodyear, 1997 |
| 0.695 | Buddy Lazier over Davy Jones, 1996 |
| 1.440 | Bobby Rahal over Kevin Cogan, 1986 |
| 1.737 | Helio Castroneves over Gil de Ferran, 2001 |
| 2.160 | Wilbur Shaw over Ralph Hepburn, 1937 |
| 2.477 | Danny Sullivan over Mario Andretti, 1985 |
| 2.481 | Jacques Villeneuve over Christian Fittipaldi, 1995 |
| 13:08.40 | Jules Goux over Spencer Wishart, 1913 |
| 12:02.87 | George Souders over Earl DeVore, 1927 |
| 10:23.00 | Joe Dawson over Teddy Tetzlaff, 1912 |
| 7:17.46 | Billy Arnold over Shorty Cantlon, 1930 |
| 6:41.89 | Louis Meyer over Wilbur Shaw, 1933 |
| 6:39.00 | Rene Thomas over Arthur Duray, 1914 |
| 6:23.79 | Ray Keech over Louis Meyer, 1929 |
| 6:19.60 | Gaston Chevrolet over Rene Thomas, 1920 |
| 4:02.30 | Troy Ruttman over Jim Rathmann, 1952 |
| 3:49.38 | Tommy Milton over Roscoe Sarles, 1921 |
