L'édition 2023 des 24 Heures du Mans marquera le centenaire de l'épreuve. Une édition prestigieuse, pour laquelle les concurrents à la victoire au général sont nombreux : Cadillac, Ferrari, Peugeot, Porsche ou Toyota et Glickenhaus ainsi que Vanwall tenteront de s'imposer.
La liste des engagés aux 24 Heures du Mans a été dévoilée officiellement le 27 février à 17 heures. La liste des engagés aux 24 Heures du Mans présente 16 Hypercar, 24 LMP2, 21 LMGTE Am et une Innovative Car.
Engagés catégorie Hypercar
| 2 – CADILLAC RACING – Cadillac V-Series.R Earl Bamber / Alex Lynn / Richard Westbrook |
| 3 – CADILLAC RACING U- Cadillac V-Series Sebastien Bourdais / Renger Van Der Zande |
| 4 – FLOYD VANWALL RACING TEAM- Vanwall Vandervell 680 Tom Dillmann / Esteban Guerrieri / Jacques Villeneuve |
| 5 – WEC PORSCHE PENSKE MOTORSPORT – Porsche 963 Dane Cameron / Michael Christensen / Frédéric Makowiecki |
| 6 – WEC PORSCHE PENSKE MOTORSPORT – Porsche 963 Kevin Estre / André Lotterer / Laurens Vanthoor |
| 7 – WEC TOYOTA GAZOO RACING – Toyota GR010 – Hybrid Mike Conway / Kamui Kobayashi / Jose Maria Lopez |
| 8 – WEC TOYOTA GAZOO RACING – Toyota GR010 – Hybrid Sébastien Buemi / Brendon Hartley / Ryo Hirakawa |
| 38 – WEC HERTZ TEAM JOTA – Porsche 963 Antonio Felix Da Costa / Will Stevens / Yifei Ye |
| 50 – WEC FERRARI AF CORSE – Ferrari 499P Antonio Fuoco / Miguel Molina / Nicklas Nielsen |
| 51 – WEC FERRARI AF CORSE – Ferrari 499P Alessandro Pier Guidi / James Calado / Antonio Giovinazzi |
| 75 – PORSCHE PENSKE MOTORSPORT – Porsche 963 Felipe Nasr |
| 93 – WEC PEUGEOT TOTALENERGIES – Peugeot 9X8 Paul Di Resta / Mikkel Jensen / Jean-Eric Vergne |
| 94 – WEC PEUGEOT TOTALENERGIES – Peugeot 9X8 Loic Duval / Gustavo Menezes / Nico Müller |
| 311 – ACTION EXPRESS RACING – Cadillac V-Series.R Luis Felipe Derani / Alexander Sims / Jack Aitken |
| 708 – WEC GLICKENHAUS RACING – Glickenhaus 007 Romain Dumas |
| 709 – GLICKENHAUS RACING – Glickenhaus 007 Franck Mailleux |
Engagés catégorie LMP2
| 9 – PREMA RACING – Oreca 07 – Gibson Bent Viscaal / Juan Manuel Correa / Filip Ugran |
| 10 – VECTOR SPORT – Oreca 07 – Gibson Ryan Cullen |
| 13 – TOWER MOTORSPORTS – Oreca 07 – Gibson Pro/Am John Farano |
| 14 – NIELSEN RACING – Oreca 07 – Gibson Pro/Am Rodrigo Sales / Mathias Beche / G Ben Hanley |
| 22 – UNITED AUTOSPORTS – Oreca 07 – Gibson Philip Hanson / Filipe Albuquerque |
| 23 – UNITED AUTOSPORTS – Oreca 07 – Gibson Joshua Pierson / Tom Blomqvist / Oliver Jarvis |
| 28 – JOTA – Oreca 07 – Gibson David Heinemeier Hansson / Oliver Rasmussen / Pietro Fittipaldi |
| 30 – DUQUEINE TEAM – Oreca 07 – Gibson Neel Jani / René Binder / Nicolas Pino |
| 31 – TEAM WRT – Oreca 07 – Gibson Sean Gelael |
| 32 – INTER EUROPOL COMPETITION – Oreca 07 – Gibson Charles Crews |
| 34 – INTER EUROPOL COMPETITION – Oreca 07 – Gibson Jakub Smiechowski / Albert Costa / Fabio Scherer |
| 35 – ALPINE ELF TEAM – Oreca 07 – Gibson André Negrão |
| 36 – ALPINE ELF TEAM- Oreca 07 – Gibson Matthieu Vaxiviere |
| 37 – COOL RACING – Oreca 07 – Gibson Pro/Am Nicolas Lapierre / Alexandre Coigny / Malthe Jakobsen |
| 39 – GRAFF RACING – Oreca 07 – Gibson Pro/Am François Heriau |
| 41 – TEAM WRT – Oreca 07 – Gibson Rui Andrade |
| 43 – DKR ENGINEERING – Oreca 07 – Gibson Pro/Am Tom Van Rompuy |
| 45 – ALGARVE PRO RACING – Oreca 07 – Gibson Pro/Am George Kurtz / James Allen / Colin Braun |
| 47 – COOL RACING – Oreca 07 – Gibson Reshad de Gérus / Vladislav Lomko |
| 48 – IDEC SPORT – Oreca 07 – Gibson Paul Lafargue / Paul Loup Chatin / Laurents Hörr |
| 63 – PREMA RACING – Oreca 07 – Gibson Doriane Pin / Daniil Kvyat / Mirko Bortolotti |
| 65 – PANIS RACING – Oreca 07 – Gibson Manuel Maldonado / Tijmen van der Helm / Job van Uitert |
| 80 – AF CORSE – Oreca 07 – Gibson Pro/Am François Perrodo / Ben Barnicoat / Norman Nato |
| 923 – RACING TEAM TURKEY – Oreca 07 – Gibson Pro/Am Salih Yoluc |
Engagés catégorie LMGTE Am
| 16 – PROTON COMPETITION – Porsche 911 RSR – 19 Ryan Hardwick / Zacharie Robichon |
| 21 – AF CORSE – Ferrari 488 GTE EVO Simon Mann / Stefano Costantini / Ulysse de Pauw |
| 25 – ORT BY TF – Aston Martin Vantage AMR Ahmad Al Harthy |
| 33 – CORVETTE RACING – Chevrolet Corvette C8.R Nicky Catsburg / Benjamin Keating / Nicolas Varrone |
| 54 – AF CORSE – Ferrari 488 GTE EVO Thomas Flohr / Francesco Castellacci / Davide Rigon |
| 55 – GMB MOTORSPORT – Aston Martin Vantage AMR Gustav Dahlmann Birch / Kasper H. Jensen / Jens Reno Møller |
| 56 – PROJECT 1 – AO – Porsche 911 RSR – 19 PJ Hyett / Gunnar Jeannette / Matteo Cairoli |
| 57 – KESSEL RACING – Ferrari 488 GTE EVO Takeshi Kimura / Gregory Huffaker / Daniel Serra |
| 60 – IRON LYNX – Porsche 911 RSR – 19 Claudio Schiavoni |
| 66 – JMW MOTORSPORT – Ferrari 488 GTE EVO Thomas Neubauer |
| 72 – TF SPORT – Aston Martin Vantage AMR Arnold Robin / Maxime Robin / Valentin Hasse-Clot |
| 74 – KESSEL RACING – Ferrari 488 GTE EVO David Fumanelli |
| 77 – DEMPSEY-PROTON RACING – Porsche 911 RSR – 19 Christian Ried |
| 83 – RICHARD MILLE AF CORSE – Ferrari 488 GTE EVO Luis Perez Companc / Alessio Rovera / Lilou Wadoux |
| 85 – IRON DAMES – Porsche 911 RSR – 19 Sarah Bovy / Michelle Gatting / Rahel Frey |
| 86 – GR RACING – Porsche 911 RSR – 19 Michael Wainwright |
| 88 – PROTON COMPETITION – Porsche 911 RSR – 19 Gianmaria Bruni |
| 98 – NORTHWEST AMR – Aston Martin Vantage AMR Paul Dalla Lana |
| 100 – WALKENHORST MOTORSPORT – Ferrari 488 GTE EVO Chandler Hull |
| 777 – WEC D’STATION RACING – Aston Martin Vantage AMR Satoshi Hoshino / Charles Fagg / Tomonobu Fujii |
| 911 – PROTON COMPETITION – Porsche 911 RSR – 19 Michael Fassbender / Richard Lietz |
Innovative car
| 24 – HENDRICK MOTORSPORTS USA G Chevrolet Camaro ZL1 Jimmie Johnson / Mike Rockenfeller / Jenson Button |