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Teljes szezonos csapatok :
| # |
pic |
Versenyző |
Nemz. |
Autó |
Csapat |
Chassis/motor |
| 2 |
 |
Josef Newgarden |
USA |
| Team Penske |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 3 |
 |
Scott McLaughlin |
Új-Zéland |
| Team Penske |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 4 |
 |
Caio Collet |
Brazil |
| A.J. Foyt Enterprises |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 5 |
 |
Pato O'Ward |
Mexikó |
| Arrow McLaren |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 6 |
 |
Nolan Siegel |
USA |
| Arrow McLaren |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 7 |
 |
Christian Lundgaard |
Dán |
| Arrow McLaren |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 8 |
 |
Kyffin Simpson |
Kajmán Sz. |
| Chip Ganassi Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 9 |
 |
Scott Dixon |
Új-Zéland |
| Chip Ganassi Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 10 |
 |
Alex Palou |
Spanyol |
| Chip Ganassi Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 12 |
 |
David Malukas |
USA |
| Team Penske |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 14 |
 |
Santino Ferrucci |
USA |
| A.J. Foyt Enterprises |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 15 |
 |
Graham Rahal |
USA |
| Rahal Letterman Lanigan Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 18 |
 |
Dennis Hauger (R) |
Norvég |
| Dale Coyne Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 20 |
 |
Alexander Rossi |
USA |
| Ed Carpenter Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 21 |
 |
Christian Rasmussen |
Dán |
| Ed Carpenter Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 26 |
 |
Will Power |
Ausztrál |
| Andretti Global w/ Curb-Agajanian |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 27 |
 |
Kyle Kirkwood |
USA |
| Andretti Global |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 28 |
 |
Marcus Ericsson |
Svéd |
| Andretti Global |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 45 |
 |
Louis Foster |
Angol |
| Rahal Letterman Lanigan Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 47 |
 |
Mick Schumacher (R) |
Német |
| Rahal Letterman Lanigan Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 51 |
 |
|
|
| Dale Coyne Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 60 |
 |
Felix Rosenqvist |
Svéd |
| Meyer Shank Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 66 |
 |
Marcus Armstrong |
Új-Zéland |
| Meyer Shank Racing |
Dallara IR18 - Honda HI18TT V6 2.2 L Hybrid |
| 76 |
 |
Rinus Veekay |
Holland |
| Juncos Hollinger Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 77 |
 |
Sting Ray Robb |
USA |
| Juncos Hollinger Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 83 |
 |
Robert Shwartzman |
Izrael |
| Prema Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
| 90 |
 |
Callum Ilott |
Angol |
| Prema Racing |
Dallara IR18 - Chevrolet Indy V6 2.2 L Hybrid |
