IndyCar well represented in Rolex 24
IndyCar drivers and former IndyCar drivers entered in the 2020 Rolex 24 include:
| Class | Driver | Team |
| DPi | Sebastien Bourdais | Mustang Sampling Racing |
| DPi | Tristan Vautier | Mustang Sampling Racing and JDC-Miller MOTORSPORTS |
| DPi | Matheus Leist and R2I product Juan Piedrahita | JDC-Miller MOTORSPORTs |
| DPi | Scott Dixon and Ryan Briscoe | Wayne Taylor Racing No. 10 Konica Minolta Cadillac |
| DPi | Ryan Hunter-Reay | No. 55 Mazda Team Joest |
| DPI | Mike Conway | No. 31 Whelen Engineering Racing Cadillac |
| DPi | Simon Pagenaud and Juan Pablo Montoya | No. 6 Team Penske Acura |
| DPi | Helio Castroneves and Alexander Rossi | No. 7 Team Penske Acura |
| LMP2 | James Davison | Rick Ware Racing No. 2 Multimatic/Riley |
| LMP2 | Ben Hanley | DragonSpeed in the No. 81 ORECA |
| GTLM | Colton Herta | No. 25 BMW Team RLL |
| GTD | Townsend Bell and Aaron Telitz | No. 12 AIM Vasser Sullivan Lexus RC-F GT3 |
| GTD | Jack Hawksworth with Kyle Busch | No. 14 AIM Vasser Sullivan Lexus RC-F GT3 |
| GTD | Katherine Legge and Ana Beatriz | GEAR Racing No. 19 Lamborghini Huracan GT3. |
| GTD | AJ Allmendinger | No. 57 Heinrich Racing with MSR Curb-Agajanian Acura NSX GT3. |