IndyCar 2018 Indy 500
| # | Piloto | Equipe | Carro | Motor | Pneus | |
|---|---|---|---|---|---|---|
| 1 | Josef Newgarden | Team Penske | Dallara DW12 | Chevrolet | Firestone | |
| 3 |  Helio Castroneves | Team Penske | Dallara DW12 | Chevrolet | Firestone | |
| 4 | Matheus Leist | A.J. Foyt Enterprises | Dallara DW12 | Chevrolet | Firestone | |
| 5 |  James Hinchcliffe | Schmidt Peterson Motorsports | Dallara DW12 | Honda | Firestone | |
| 6 | Robert Wickens | Schmidt Peterson Motorsports | Dallara DW12 | Honda | Firestone | |
| 7 |  Jay Howard | SPM / AFS Racing | Dallara DW12 | Honda | Firestone | |
| 9 |  Scott Dixon | Chip Ganassi Racing | Dallara DW12 | Honda | Firestone | |
| 10 |  Ed Jones | Chip Ganassi Racing | Dallara DW12 | Honda | Firestone | |
| 12 |  Will Power | Team Penske | Dallara DW12 | Chevrolet | Firestone | |
| 13 | Danica Patrick | Ed Carpenter Racing | Dallara DW12 | Chevrolet | Firestone | |
| 14 | Tony Kanaan | A.J. Foyt Enterprises | Dallara DW12 | Chevrolet | Firestone | |
| 15 | Graham Rahal | Rahal Letterman Lanigan Racing | Dallara DW12 | Honda | Firestone | |
| 17 | Conor Daly | Dale Coyne Racing dba Thom Burns Racing | Dallara DW12 | Honda | Firestone | |
| 18 |  Sébastien Bourdais | Dale Coyne Racing | Dallara DW12 | Honda | Firestone | |
| 19 | Zachary Claman DeMelo | Dale Coyne Racing | Dallara DW12 | Honda | Firestone | |
| 20 | Ed Carpenter | Ed Carpenter Racing | Dallara DW12 | Chevrolet | Firestone | |
| 21 | Spencer Pigot | Ed Carpenter Racing | Dallara DW12 | Chevrolet | Firestone | |
| 22 | Simon Pagenaud | Team Penske | Dallara DW12 | Chevrolet | Firestone | |
| 23 | Charlie Kimball | Carlin | Dallara DW12 | Chevrolet | Firestone | |
| 24 | Sage Karam | Dreyer & Reinbold Racing | Dallara DW12 | Chevrolet | Firestone | |
| 25 | Stefan Wilson | Andretti Autosport | Dallara DW12 | Honda | Firestone | |
| 26 | Zach Veach | Andretti Autosport | Dallara DW12 | Honda | Firestone | |
| 27 | Alexander Rossi | Andretti Autosport | Dallara DW12 | Honda | Firestone | |
| 28 | Ryan Hunter-Reay | Andretti Autosport | Dallara DW12 | Honda | Firestone | |
| 29 |  Carlos Munoz | Andretti Autosport | Dallara DW12 | Honda | Firestone | |
| 30 |  Takuma Sato | Rahal Letterman Lanigan Racing | Dallara DW12 | Honda | Firestone | |
| 32 | Kyle Kaiser | Juncos Racing | Dallara DW12 | Chevrolet | Firestone | |
| 33 | James Davison | Foyt with Byrd / Hollinger / Belardi | Dallara DW12 | Chevrolet | Firestone | |
| 59 | Max Chilton | Carlin | Dallara DW12 | Chevrolet | Firestone | |
| 60 | Jack Harvey | Michael Shank Racing | Dallara DW12 | Honda | Firestone | |
| 63 | Pippa Mann | Dale Coyne Racing | Dallara DW12 | Honda | Firestone | |
| 64 |  Oriol Servia | Scuderia Corsa with RLL | Dallara DW12 | Honda | Firestone | |
| 66 | J.R. Hildebrand | Dreyer & Reinbold Racing | Dallara DW12 | Chevrolet | Firestone | |
| 88 | Gabby Chaves | Harding Racing | Dallara DW12 | Chevrolet | Firestone | |
| 98 | Marco Andretti | Andretti Autosport | Dallara DW12 | Honda | Firestone |