IndyCar Road America entry list shows changes
Sponsors come and go in IndyCar as different B2B deals are used in different markets. Below is the 21-car Road America entry list. Drivers with different livery from the previous race are Pagenaud (Menards), Newgarden (Devilbiss), Castroneves (Rev), Rahal (Gehl), Rossi (NAPA is back). Unsponsored cars include Aleshin, Sato, Andretti and the TBA #18 car of Dale Coyne who is waiting for Esteban Gutierrez's check to clear.
| No. | CAR # | DRIVER | HOMETOWN | CAR NAME | TEAM | AERO KIT/ENGINE |
| 1 | 1 | Simon Pagenaud | Montmorillon, France | Menards Team Penske | Team Penske | Chevrolet |
| 2 | 2 | Josef Newgarden | Nashville, Tennessee | Devilbiss Team Penske | Team Penske | Chevrolet |
| 3 | 3 | Helio Castroneves | Sao Paulo, Brazil | REV Group Team Penske | Team Penske | Chevrolet |
| 4 | 4 | Conor Daly | Noblesville, Indiana | ABC Supply AJ Foyt Racing | A.J. Foyt Enterprises | Chevrolet |
| 5 | 5 | James Hinchcliffe | Toronto, Canada | Arrow Schmidt Peterson Motorsports | Schmidt Peterson Motorsports | Honda |
| 6 | 7 | Mikhail Aleshin | Moscow, Russia | SMP Racing Schmidt Peterson Motorsports | Schmidt Peterson Motorsports | Honda |
| 7 | 8 | Max Chilton | Reigate, England | Gallagher | Chip Ganassi Racing Teams | Honda |
| 8 | 9 | Scott Dixon | Auckland, New Zealand | NTT Data | Chip Ganassi Racing Teams | Honda |
| 9 | 10 | Tony Kanaan | Salvador, Brazil | NTT Data | Chip Ganassi Racing Teams | Honda |
| 10 | 12 | Will Power | Toowoomba, Australia | Verizon Team Penske | Team Penske | Chevrolet |
| 11 | 14 | Carlos Munoz | Bogota, Colombia | ABC Supply AJ Foyt Racing | A.J. Foyt Enterprises | Chevrolet |
| 12 | 15 | Graham Rahal | New Albany, Ohio | GEHL / D-A Lubricant | Rahal Letterman Lanigan Racing | Honda |
| 13 | 18 | TBA | TBA | Dale Coyne Racing | Dale Coyne Racing | Honda |
| 14 | 19 | Ed Jones (R) | Dubai, United Arab Emirates | Boy Scouts of America | Dale Coyne Racing | Honda |
| 15 | 20 | Spencer Pigot | Orlando, Florida | Fuzzy's Vodka | Ed Carpenter Racing | Chevrolet |
| 16 | 21 | JR Hildebrand | Sausalito, California | Direct Supply | Ed Carpenter Racing | Chevrolet |
| 17 | 26 | Takuma Sato | Tokyo, Japan | Andretti Autosport | Andretti Autosport | Honda |
| 18 | 27 | Marco Andretti | Nazareth, Pennsylvania | Andretti Autosport | Andretti Autosport with Yarrow | Honda |
| 19 | 28 | Ryan Hunter-Reay | Fort Lauderdale, Florida | DHL | Andretti Autosport | Honda |
| 20 | 83 | Charlie Kimball | Camarillo, California | Tresiba | Chip Ganassi Racing Teams | Honda |
| 21 | 98 | Alexander Rossi | Nevada City, California | NAPA Auto Parts/Curb | Andretti Herta Autosport with Curb-Agajanian | Honda |
All cars use fourth-generation Verizon IndyCar Series chassis (Dallara IR12)
with Chevrolet or Honda aerodynamic bodywork kits, Chevrolet or Honda engines and Firestone tires.
(R) – Denotes Sunoco Rookie of the Year candidate