| No. | Class | Team | Drivers | Car | Engine | Tyres | Fuel | |
|---|---|---|---|---|---|---|---|---|
| 1 | 0 | P | DeltaWing Racing | Memo Rojas Katherine Legge Andy Meyrick | DeltaWing DWC13 | Elan | C | E10 |
| 2 | 1 | P | Tequila Patron ESM | Scott Sharp Ryan Dalziel David Heinemeier Hansson | Honda HPD ARX | Honda | C | E10 |
| 3 | 2 | P | Tequila Patron ESM | Ed Brown Johannes van Overbeek Jon Fogarty | Honda HPD ARX | Honda | C | E10 |
| 4 | 5 | P | Action Express Racing | João Barbosa Christian Fittipaldi Sebastien Bourdais | Corvette DP | Chevrolet | C | E10 |
| 5 | 7 | P | Starworks Motorsport | Scott Mayer Brendon Hartley TBA | Riley DP | BMW Power | C | E10 |
| 6 | 10 | P | Wayne Taylor Racing | Jordan Taylor Ricky Taylor Max Angelelli | Corvette DP | Chevrolet | C | E10 |
| 7 | 31 | P | Action Express Racing | Eric Curran Dane Cameron Max Papis | Corvette DP | Chevrolet | C | E10 |
| 8 | 50 | P | Fifty Plus Racing | Jim Pace Bryon DeFoor David Hinton Dorsey Schroeder | Riley DP | BMW Power | C | E10 |
| 9 | 57 | P | Krohn Racing | Tracy Krohn Olivier Pla Nic Jonsson | Ligier JS PS2 | Judd | C | E10 |
| 10 | 60 | P | Michael Shank Racing | John Pew Ozz Negri Jr Justin Wilson | Ligier JS PS2 | Honda HPD | C | E10 |
| 11 | 70 | P | SpeedSource | Jonathan Bomarito Tristan Nunez Sylvain Tremblay | Mazda | Mazda | C | D |
| 12 | 90 | P | VisitFlorida.com Racing | Richard Westbrook Michael Valiante Mike Rockenfeller | Corvette DP | Chevrolet | C | E10 |
| 13 | 01 | P | Chip Ganassi Racing with Felix Sabates | Joey Hand Scott Pruett Scott Dixon | Riley DP | Ford EcoBoost | C | E10 |
| 14 | 07 | P | SpeedSource | Joel Miller Tom Long Ben Devlin Sylvain Tremblay | Mazda | Mazda | C | D |
| 15 | 8 | PC | Starworks Motorsport | Mirco Schultis Renger van der Zande Mike Hedlund | ORECA FLM09 | Chevrolet | C | E10 |
| 16 | 11 | PC | RSR Racing | Chris Cumming Bruno Junqueira Gustavo Menezes | ORECA FLM09 | Chevrolet | C | E10 |
| 17 | 16 | PC | BAR1 Motorsports | Marc Drumwright Tomy Drissi David Cheng Martin Plowman | ORECA FLM09 | Chevrolet | C | E10 |
| 18 | 38 | PC | Performance Tech Motorsports | James French Jerome Mee TBA | ORECA FLM09 | Chevrolet | C | E10 |
| 19 | 52 | PC | PR1/Mathiasen Motorsports | Mike Guasch Andrew Palmer Tom Kimber-Smith | ORECA FLM09 | Chevrolet | C | E10 |
| 20 | 54 | PC | CORE autosport | Jon Bennett Colin Braun James Gue | ORECA FLM09 | Chevrolet | C | E10 |
| 21 | 85 | PC | JDC/Miller Motorsports | Mikhail Goikhberg Chris Miller Rusty Mitchell Gerry Kraut | ORECA FLM09 | Chevrolet | C | E10 |
| 22 | 3 | GTLM | Corvette Racing | Jan Magnussen Antonio Garcia Ryan Briscoe | Chevrolet Corvette C7.R | Chevrolet | M | E85C |
| 23 | 4 | GTLM | Corvette Racing | Oliver Gavin Tommy Milner Simon Pagenaud | Chevrolet Corvette C7.R | Chevrolet | M | E85C |
| 24 | 17 | GTLM | Team Falken Tire | Wolf Henzler Bryan Sellers Patrick Long | Porsche 911 RSR | Porsche | F | E85C |
| 25 | 24 | GTLM | BMW Team RLL | John Edwards Lucas Luhr Jens Klingmann | BMW Z4 GTE | BMW | M | E85C |
| 26 | 25 | GTLM | BMW Team RLL | Bill Auberlen Dirk Werner Augusto Farfus | BMW Z4 GTE | BMW | M | E85C |
| 27 | 62 | GTLM | Risi Competizione | Pierre Kaffer Giancarlo Fisichella Andrea Bertolini | Ferrari F458 Italia | Ferrari | M | E85C |
| 28 | 98 | GTLM | Aston Martin Racing | Pedro Lamy Paul Dalla Lana Darren Turner Matthias Lauda | Aston Martin Vantage V8 | Aston Martin | M | E10 |
| 29 | 911 | GTLM | Porsche North America | Nick Tandy Patrick Pilet Richard Leitz | Porsche 911 RSR | Porsche | M | E85C |
| 30 | 912 | GTLM | Porsche North America | Jörg Bergmeister Earl Bamber Frédéric Makowiecki | Porsche 911 RSR | Porsche | M | E85C |
| 31 | 18 | GTD | Mühlner Motorsports America | Connor De Phillippi Dennis Trebing TBA | Porsche 911 GT America | Porsche | C | E10 |
| 32 | 19 | GTD | Mühlner Motorsports America | Connor De Phillippi TBA TBA | Porsche 911 GT America | Porsche | C | E10 |
| 33 | 22 | GTD | Alex Job Racing | Cooper MacNeill Leh Keen Andrew Davis | Porsche 911 GT America | Porsche | C | E10 |
| 34 | 23 | GTD | Team Seattle/Alex Job Racing | Ian James Mario Farnbacher Alex Riberas | Porsche 911 GT America | Porsche | C | E10 |
| 35 | 33 | GTD | Riley Motorsports | Ben Keating Jeroen Bleekemolen Sebastiaan Bleekemolen | Dodge Viper SRT | Viper V10 | C | E10 |
| 36 | 44 | GTD | Magnus Racing | John Potter Andy Lally Marco Seefried | Porsche 911 GT America | Porsche | C | E10 |
| 37 | 45 | GTD | Flying Lizard Motorsports | Marko Holzer Robert Thorne Colin Thompson | Audi R8 LMS | Audi | C | E10 |
| 38 | 48 | GTD | Paul Miller Racing | Christopher Haase Bryce Miller Dion von Moltke | Audi R8 LMS | Audi | C | E10 |
| 39 | 49 | GTD | AF Corse | Piergiuseppe Perazzini Marco Cioci Rui Aguas Enzo Potolicchio | Ferrari 458 Italia | Ferrari | C | E10 |
| 40 | 58 | GTD | Wright Motorsports | Madison Snow Jan Heylen Emilio Valverde | Porsche 911 GT America | Porsche | C | E10 |
| 41 | 63 | GTD | Scuderia Corsa | Bill Sweedler Townsend Bell Anthony Lazzaro | Ferrari 458 Italia | Ferrari | C | E10 |
| 42 | 73 | GTD | Park Place Motorsports | Patrick Lindsey Spencer Pumpelly Jim Norman | Porsche 911 GT America | Porsche | C | E10 |
| 43 | 81 | GTD | GB Autosport | Damien Faulkner Mike Skeen Michael Avenatti | Porsche 911 GT America | Porsche | C | E10 |
| 44 | 93 | GTD | Riley Motorsports | Al Carter Marc Goossens Ben Keating Cameron Lawrence | Dodge Viper SRT | BMW | C | E10 |
| 45 | 97 | GTD | Turner Motorsport | Michael Marsal Markus Palttala Andy Priaulx Boris Said | BMW Z4 | BMW | C | E10 |
| 46 | 007 | GTD | TRG-AMR | Christina Nielsen James Davison TBA | Aston Martin V12 Vantage | Aston Martin | C | E10 |
| 47 | 009 | GTD | TRG-AMR | TBA TBA TBA | Aston Martin V12 Vantage | Aston Martin | C | E10 |
