| 2 |
 Josef Newgarden |
22.12.1990 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 3 |
 Helio Castroneves |
10.05.1971 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 |  |
| 12 |
 Will Power |
01.03.1979 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 22 |
 Simon Pagenaud |
18.05.1984 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 4 |
Matheus Leist |
08.09.1997 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 14 |
Tony Kanaan |
31.12.1974 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 5 |
 James Hinchcliffe |
05.12.1986 |
Schmidt Peterson Motorsports |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 7 |
 Marcus Ericsson |
02.09.1990 |
Schmidt Peterson Motorsports |
Dallara DW12 (IR18) - Honda |
FI | 16 |  |
| 7 |
Conor Daly |
17.12.1991 |
Schmidt Peterson Motorsports |
Dallara DW12 (IR18) - Honda |
FI | 1 |  |
| 77 |
 Oriol Servia |
13.07.1974 |
Schmidt Peterson Motorsports |
Dallara DW12 (IR18) - Honda |
FI | 1 |  |
| 9 |
 Scott Dixon |
22.07.1980 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 10 |
Felix Rosenqvist |
07.11.1991 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 15 |
Graham Rahal |
04.01.1989 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 30 |
 Takuma Sato |
20.01.1977 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 42 |
 Jordan King |
26.02.1994 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 |  |
| 18 |
Sebastien Bourdais |
28.02.1979 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 19 |
Santino Ferrucci |
31.05.1998 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 33 |
James Davison |
28.08.1986 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 |  |
| 20 |
Ed Carpenter |
03.03.1981 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 5 |  |
| 20/63 |
 Edward Jones |
12.02.1995 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 13 |  |
| 21 |
Spencer Pigot |
29.09.1993 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 |  |
| 23 |
Charlie Kimball |
20.02.1985 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 7 |  |
| 31 |
 Patricio O'Ward |
06.05.1999 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 7 |  |
| 31 |
Sage Karam |
03.05.1995 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 |  |
| 31 |
RC Enerson |
06.03.1997 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 |  |
| 59 |
Max Chilton |
21.04.1991 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 12 |  |
| 59 |
Conor Daly |
17.12.1991 |
Carlin Motorsport |
Dallara DW12 (IR18) - Chevrolet |
FI | 4 |  |
| 24 |
Sage Karam |
03.05.1995 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 |  |
| 48 |
J.R. Hildebrand |
03.01.1988 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 |  |
| 25 |
Conor Daly |
17.12.1991 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 2 |  |
| 26 |
Zach Veach |
09.12.1994 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 27 |
Alexander Rossi |
25.09.1991 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 28 |
Ryan Hunter-Reay |
17.12.1980 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 32 |
Kyle Kaiser |
05.03.1996 |
Juncos Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 |  |
| 39 |
Pippa Mann |
11.08.1984 |
Clauson-Marshall Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 |  |
| 60 |
Jack Harvey |
15.04.1993 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 10 |  |
| 66 |
Fernando Alonso |
29.07.1981 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 0 |  |
| 81 |
Benjamin Hanley |
22.01.1985 |
DragonSpeed |
Dallara DW12 (IR18) - Chevrolet |
FI | 3 |  |
| 88 |
Colton Herta |
30.03.2000 |
Harding Steinbrenner Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
| 98 |
Marco Andretti |
13.03.1987 |
Andretti Herta Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 |  |
