| 0 | Jeannette / Ordoñez | Nissan DeltaWing (USA) | | DeltaWing | LM12 | | Nissan | UNC |
| 01 | Sharp / Vilander / Van Overbeek | Extreme Speed Motorsports | Scott Sharp | Ferrari | 458 | Italia GT | Ferrari | GT |
| 02 | Cosmo / Brown / Lazzaro | Extreme Speed Motorsports | Scott Sharp | Ferrari | 458 | Italia GT | Ferrari | GT |
| 05 | Braun / Bennett / Gonzalez | Core Autosport | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 055 | Franchitti / Franchitti / Tucker | Level 5 Motorsports (USA) | Scott Tucker | HPD | ARX-03 | b | Honda | LMP2 |
| 06 | Popow / Dalziel / Wilkins | Core Autosport | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 1 | Kimber-Smith / Brundle / Buncombe | Greaves Motorsports (GB) | Jacob Greaves | Zytek | Z11SN | | Nissan | LMP2 |
| 3 | Garcia / Magnussen / 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 | Graf / Luhr / Dumas | Muscle Milk Pickett Racing (USA) | | HPD | ARX-03 | a | Honda | LMP1 |
| 7 | | Merchant Services Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 8 | Downs / Marcelli / Ducote | Merchant Services Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 9 | Drissi / Junqueira / Vera | RSR Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 11 | Cumming / Valiante / Johnston | JDX Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 12 | Jani / Belicchi / Prost | Rebellion Racing (CH) | Bart Hayden | Lola | B12/60 | | Toyota | LMP1 |
| 16 | Dyson / Smith / Kane | Dyson Racing Team Inc. (USA) | | Lola | B12/60 | | Mazda | LMP1 |
| 17 | Sellers / Henzler / Ragginger | Team Falken Tire | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 18 | | Performance Tech Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 20 | Burgess / Patterson / McMurry | Dyson Racing Team Inc. (USA) | | Lola | B11/60 | -66 | Mazda | LMP1 |
| 22 | Keen / MacNeil / von Moltke | Alex Job Racing (USA) | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 23 | Bell / Sweedler / Mowlem | Lotus / Alex Job Racing (USA) | | Lotus | Evora | GTE | Cosworth | GT |
| 24 | Davis / Calvert-Jones / Avenatti | Competition Motorsports | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 25 | Lewis / Richard / Ende | Dempsey Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 27 | Cameron / Dempsey / Foster | Dempsey Racing | | Lola | B12/80 | -87 | Judd | LMP2 |
| 30 | Cisneros / Giermaziak / Farnbacher | NGT Motorsport | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 31 | Benitez, Jr. / Bullit / Segal | NGT Motorsport | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 34 | LeSaffre / Faulkner / Wong | Green Hornet Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 35 | Nicolet / Pla / Baguette | OAK Racing (F) | Jacques Nicolet | Morgan | LM P2 | | Nissan | LMP2 |
| 37 | Heinemeier Hansson / Plowman / Lux | Conquest Endurance | | Morgan | LM P2 | | Nissan | LMP2 |
| 44 | Holzer / Neiman / Tandy | Flying Lizard Motorsports (USA) | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 45 | Bergmeister / Long / Pilet | Flying Lizard Motorsports (USA) | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 46 | Tinseau / Beche / Thiriet | Thiriet by TDS Racing (F) | | Oreca | 03 | | Nissan | LMP2 |
| 48 | Miller / Maassen / Lietz | Paul Miller Racing | Paul Miller | Porsche | 997 GT3 RSR | | Porsche | GT |
| 52 | Junco / Dobson / Julian | PR1 Mathiasen Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 55 | Auberlen / Summerton / Müller | BMW Team RLL (USA) | | BMW | M3 | E92 GT | BMW | GT |
| 56 | Alzen / Müller / Summerton | BMW Team RLL (USA) | | BMW | M3 | E92 GT | BMW | GT |
| 60 | Perazzini / Griffin / Cioci | AF Corse (I) | Amato Ferrari | Ferrari | 458 | Italia GT | Ferrari | GTE Am |
| 66 | Pumpelly / Di Guida / Canache | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 67 | Narac / Pons / Armindo | IMSA Performance Matmut (F) | | Porsche | 997 GT3 RSR | | Porsche | GTE Am |
| 68 | Hedlund / Collard / Gutierrez, Jr. | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 91 | Farnbacher / Wittmer / Hunter-Reay | SRT Motorsports (USA) | Bill Riley | SRT | Viper | GTS-R | Viper | GT |
| 93 | Goossens / Kendall / Bomarito | SRT Motorsports (USA) | Bill Riley | SRT | Viper | GTS-R | Viper | GT |
| 95 | Tucker / Diaz / Bouchut | Level 5 Motorsports (USA) | Scott Tucker | HPD | ARX-03 | b | Honda | LMP2 |
| 118 | Firth / Hartley / Hughes | Murphy Prototypes (IRL) | Greg Murphy | Oreca | 03 | | Nissan | LMP2 |