| No. | Class | Team | Driver | Car | Engine | Tyres | Fuel | |
|---|---|---|---|---|---|---|---|---|
| 1 | 0 | P | Panoz DeltaWing Racing | Katherine Legge Sean Rayhall Andy Meyrick | DWC13 | Elan | C | E10 |
| 2 | 2 | P | Tequila Patron ESM | Scott Sharp Pipo Derani Johannes van Overbeek | Liger JS P2 | Honda | C | E10 |
| 3 | 5 | P | Action Express Racing | João Barbosa Christian Fittipaldi Filipe Albuquerque | Corvette DP | Chevrolet | C | E10 |
| 4 | 10 | P | Wayne Taylor Racing | Ricky Taylor Jordan Taylor Max Angelelli | Corvette DP | Chevrolet | C | E10 |
| 5 | 31 | P | Action Express Racing | Dane Cameron Eric Curran Simon Pagenaud | Corvette DP | Chevrolet | C | E10 |
| 6 | 55 | P | Mazda Motorsport | Tristan Nunez Jonathan Bomarito Spencer Pigot | Mazda | Mazda | C | E10 |
| 7 | 60 | P | Michael Shank Racing | Oswaldo Negri Jr. John Pew Olivier Pla | Ligier JS PS2 | Honda HPD | C | E10 |
| 8 | 70 | P | Mazda Motorsport | Tom Long Joel Miller Spencer Pigot | Mazda | Mazda | C | E10 |
| 9 | 90 | P | VisitFlorida Racing | Marc Goossens Ryan Dalziel Ryan Hunter-Reay | Corvette DP | Chevrolet | C | E10 |
| 10 | 7 | PC | Starworks Motorsport | James Dayson Quinlan Lall Stefano Coletti | ORECA FLM09 | Chevrolet | C | E10 |
| 11 | 8 | PC | Starworks Motorsport | Renger van der Zande Alex Popow David Heinemeier Hansson | ORECA FLM09 | Chevrolet | C | E10 |
| 12 | 20 | PC | BAR1 Motorsports | Don Yount Tony Drissi Johnny Mowlem | ORECA FLM09 | Chevrolet | C | E10 |
| 13 | 38 | PC | Performance Tech Motorsports | James French Kyle Marcelli Kenton Koch | ORECA FLM09 | Chevrolet | C | E10 |
| 14 | 52 | PC | PR1/Mathiasen Motorsports | Robert Alon Tom Kimber-Smith Jose Gutierrez | ORECA FLM09 | Chevrolet | C | E10 |
| 15 | 85 | PC | JDC/Miller Motorsports | Misha Goikhberg Stephen Simpson Chris Miller | ORECA FLM09 | Chevrolet | C | E10 |
| 16 | 88 | PC | Starworks | Mark Kvamme Richard Bradley Maxwell Hanratty | ORECA FLM09 | Chevrolet | C | E10 |
| 17 | 3 | GTLM | Corvette Racing | Antonio Garcia Jan Magnussen Mike Rockenfeller | Corvette C7.R | Chevrolet | M | E20C |
| 18 | 4 | GTLM | Corvette Racing | Oliver Gavin Tommy Milner Marcel Fassler | Corvette C7.R | Chevrolet | M | E20C |
| 19 | 25 | GTLM | BMW Team RLL | Bill Auberlen Dirk Werner Augusto Farfus | BMW M6 GTLM | BMW | M | E20C |
| 20 | 62 | GTLM | Risi Competizione | Giancarlo Fisichella Toni Wilander James Calado | Ferrari 488 GTE | Ferrari | M | E20C |
| 21 | 66 | GTLM | Ford Chip Ganassi Racing | Joey Hand Dirk Müller Sebastien Bourdais | Ford GT | Ford | M | E20C |
| 22 | 67 | GTLM | Ford Chip Ganassi Racing | Ryan Briscoe Richard Westbrook Scott Dixon | Ford GT | Ford | M | E20C |
| 23 | 68 | GTLM | Scuderia Corsa | Daniel Serra Alessandro Pier Guidi Andrea Bertolini | Ferrari 488 GTE | Ferrari | M | E-20C |
| 24 | 100 | GTLM | BMW Team RLL | John Edwards Lucas Luhr Kumo Wittmer | BMW M6 GTLM | BMW | M | E20C |
| 25 | 911 | GTLM | Porsche North America | Patrick Pilet Nick Tandy Richard Lietz | Porsche 911 RSR | Porsche | M | E20C |
| 26 | 912 | GTLM | Porsche North America | Earl Bamber Frédéric Makowiecki Michael Christensen | Porsche 911 RSR | Porsche | M | E20C |
| 27 | 6 | GTD | Stevenson Motorsports | Robin Liddell Andrew Davis Mike Skeen | Audi R8 LMS GT3 | Audi | C | E10 |
| 28 | 9 | GTD | Stevenson Motorsports | Lawson Aschenbach Matt Bell Dion von Moltke | Audi R8 LMS GT3 | Audi | C | E10 |
| 29 | 16 | GTD | Change Racing | Spencer Pumpelly Corey Lewis Richard Antinucci | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 30 | 23 | GTD | Team Seattle/Alex Job Racing | Mario Farnbacher Alex Riberas Ian James | Porsche 991 GT3 R | Porsche | C | E10 |
| 31 | 27 | GTD | Dream Racing Competition | Paolo Ruberti Luca Persiani Cedric Sbirrazzuoli | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 32 | 33 | GTD | Riley Motorsports | Ben Keating Jeroen Bleekemolen Marc Miller | Dodge Viper SRT | Viper V10 | C | E10 |
| 33 | 44 | GTD | Magnus Racing | John Potter Andy Lally Marco Seefried | Audi R8 LMS GT3 | Audi | C | E10 |
| 34 | 48 | GTD | Paul Miller Racing | Bryan Sellers Madison Snow Bryce Miller | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 35 | 63 | GTD | Scuderia Corsa | Christina Nielsen Alessandro Balzan Jeff Segal | Ferrari 488 GT3 | Ferrari | C | E10 |
| 36 | 73 | GTD | Park Place Motorsports | Patrick Lindsey Jörg Bergmeister Matthew McMurry | Porsche 911 GT3 R | Porsche | C | E10 |
| 37 | 96 | GTD | Turner Motorsport | Bret Curtis Jens Klingmann Ashley Freiberg | BMW M6 GT3 | BMW | C | E10 |
| 38 | 97 | GTD | Turner Motorsport | Michael Marsal Markus Palttala Cameron Lawrence | BMW M6 GT3 | BMW | C | E10 |