| 0 | Legge / Meyrick | DeltaWing Racing Cars (USA) | | DeltaWing | DWC13 | | Elan | LMP1 |
| 01 | Sharp / Lazzaro / Brabham | Extreme Speed Motorsports (USA) | Scott Sharp | HPD | ARX-03 | b | HPD | LMP2 |
| 02 | Brown / Bell / Van Overbeek | Extreme Speed Motorsports (USA) | Scott Sharp | HPD | ARX-03 | b | HPD | LMP2 |
| 05 | Bennett / Kimber-Smith / Wilkins | Core Autosport | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 06 | Braun / Long / Christensen | CORE autosport | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 3 | Magnussen / Garcia / Taylor | Corvette Racing (USA) | Gary Pratt | Chevrolet | Corvette C6 | .R ZR1 | Chevrolet | GT |
| 4 | Gavin / Milner / Westbrook | Corvette Racing (USA) | Gary Pratt | Chevrolet | Corvette C6 | .R ZR1 | Chevrolet | GT |
| 6 | Luhr / Graf / Dumas | Muscle Milk Pickett Racing (USA) | | HPD | ARX-03 | c | HPD | LMP1 |
| 7 | Mitchell / Drissi / French | BAR1 Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 8 | Cumming / Marcelli / Johansson | BAR1 Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 9 | Ende / Junqueira / Menezes | RSR Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 10 | Espenlaub / Putman / Law | Dempsey Racing | John Potter | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 11 | Hedlund / Fogarty / Heylen | JDX Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 12 | Jani / Heidfeld / Prost | Rebellion Racing (CH) | | Lola | B12/60 | | Toyota | LMP1 |
| 16 | Dyson / Burgess / McMurry | Dyson Racing Team Inc. (USA) | | Lola | B12/60 | | Mazda | LMP1 |
| 17 | Sellers / Henzler / Tandy | Team Falken Tire | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 18 | Nunez / Shears | Performance Tech Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 22 | MacNeil / Bleekemolen / Bleekemolen | Alex Job Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 23 | Keen / Sweedler / Mowlem | Team West/AJR/Boardwalk Ferrari | | Ferrari | 458 | Italia GT | Ferrari | GT |
| 25 | Rayhall / Negri | 8Star Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 27 | Dempsey / Lally / Foster | Dempsey Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 30 | Cisneros / Giermaziak / Farnbacher | NGT Motorsports | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 31 | Armindo / Nielsen / Benitez, Jr. | NGT Motorsport | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 44 | Neiman / von Moltke / Sandberg | Flying Lizard Motorsports | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 45 | Canache / Pumpelly / Snow | Flying Lizard Motorsports | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 48 | Miller / Holzer / Collard | Paul Miller Racing | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 52 | Cameron / Guasch / Cheng | PR1 Mathiasen Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 55 | Alzen / Martin / Müller | BMW Team RLL (USA) | | BMW | Z4 | GTE | BMW | GT |
| 56 | Edwards / Müller / Auberlen | BMW Team RLL (USA) | | BMW | Z4 | GTE | BMW | GT |
| 62 | Malucelli / Beretta / Liddell | Risi Competizione (USA) | | Ferrari | 458 | Italia GT | Ferrari | GT |
| 66 | Keating / Faulkner / Stanton | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 91 | Farnbacher / Goossens / Dalziel | SRT Motorsports (USA) | Bill Riley | SRT | Viper | GTS-R | Viper | GT |
| 93 | Kendall / Bomarito / Wittmer | SRT Motorsports (USA) | Bill Riley | SRT | Viper | GTS-R | Viper | GT |
| 551 | Tucker / Briscoe / Franchitti | Level 5 Motorsports (USA) | Scott Tucker | HPD | ARX-03 | b | HPD | LMP2 |
| 552 | Cosmo / Kane / Dumbreck | Level 5 Motorsports (USA) | Scott Tucker | HPD | ARX-03 | b | HPD | LMP2 |