| NO. |
DRIVER |
HOMETOWN |
CAR NAME |
TEAM |
ENGINE |
| 1 |
Josef Newgarden |
Nashville, Tennessee |
Hitachi Team Penske |
Team Penske |
Chevrolet |
| 4 |
Charlie Kimball |
Camarillo, California |
TRESIBA / AJ FOYT RACING |
A.J. Foyt Enterprises |
Chevrolet |
| 5 |
Pato O'Ward |
Monterey, Mexico |
Arrow McLaren SP |
Arrow McLaren SP |
Chevrolet |
| 7 |
Oliver Askew (R) |
Jupiter, Florida |
Arrow McLaren SP |
Arrow McLaren SP |
Chevrolet |
| 8 |
Marcus Ericsson |
Kumla, Sweden |
Huski Chocolate Chip Ganassi Racing |
Chip Ganassi Racing |
Honda |
| 9 |
Scott Dixon |
Auckland, New Zealand |
PNC Bank Chip Ganassi Racing |
Chip Ganassi Racing |
Honda |
| 10 |
Felix Rosenqvist |
Värnamo, Sweden |
NTT DATA Chip Ganassi Racing |
Chip Ganassi Racing |
Honda |
| 12 |
Will Power |
Toowoomba, Australia |
Verizon Team Penske |
Team Penske |
Chevrolet |
| 14 |
Sebastien Bourdais |
Le Mans, France |
AJ Foyt Racing |
A.J. Foyt Enterprises |
Chevrolet |
| 15 |
Graham Rahal |
New Albany, Ohio |
United Rentals |
Rahal Letterman Lanigan Racing |
Honda |
| 18 |
Santino Ferrucci |
Woodbury, Connecticut |
SealMaster |
Dale Coyne Racing w/ Vasser Sull |
Honda |
| 20 |
Conor Daly |
Noblesville, Indiana |
U.S. Air Force |
Ed Carpenter Racing |
Chevrolet |
| 21 |
Rinus VeeKay (R) |
Hoofddorp, Netherlands |
Sonax |
Ed Carpenter Racing |
Chevrolet |
| 22 |
Simon Pagenaud |
Montmorillon, France |
Menards Team Penske |
Team Penske |
Chevrolet |
| 24 |
Sage Karam |
Nazareth, Pennsylvania |
DRR Wix Filters |
Dreyer & Reinbold Racing |
Chevrolet |
| 26 |
Zach Veach |
Stockdale, Ohio |
Gainbridge |
Andretti Autosport |
Honda |
| 27 |
Alexander Rossi |
Nevada City, California |
AutoNation / NAPA AUTO PARTS |
Andretti Autosport |
Honda |
| 28 |
Ryan Hunter-Reay |
Fort Lauderdale, Florida |
DHL |
Andretti Autosport |
Honda |
| 30 |
Takuma Sato |
Tokyo, Japan |
Panasonic / Mi-Jack |
Rahal Letterman Lanigan Racing |
Honda |
| 31 |
Felipe Nasr (R) |
Brasilia, Brazil |
Carlin |
Carlin |
Chevrolet |
| 55 |
Alex Palou (R) |
Barcelona, Spain |
Dale Coyne Racing with Team Goh |
Dale Coyne Racing with Team Goh |
Honda |
| 59 |
Max Chilton |
Reigate, England |
Gallagher Carlin |
Carlin |
Chevrolet |
| 60 |
Jack Harvey |
Lincoln, England |
AutoNation/Sirius XM |
Meyer Shank Racing |
Honda |
| 81 |
Ben Hanley (R) |
Manchester, England |
DragonSpeed FlexBox |
DragonSpeed |
Chevrolet |
| 88 |
Colton Herta |
Belleair, Florida |
Capstone |
Andretti Harding Steinbrenner Auto |
Honda |
| 98 |
Marco Andretti |
Nazareth, Pennsylvania |
U.S. Concrete / Curb |
Andretti Herta w/Marco & Curb-Agaj |
Honda |