The World of World Endurance Championship drivers at Le Mans

Total nations represented (27):  
Argentina, Australia, Austria, Belgium, Brazil, Canada, China, Denmark, Finland, France, Germany, Great Britain, Holland, Indonesia, Ireland, Italy, Japan, Mexico, New Zealand, Poland, Portugal, Slovakia, South Africa, Spain, Sweden, Switzerland and USA
•    France and Great Britain have drivers competing in every class.
•    No driver from China, Poland, Slovakia, South Africa or Sweden has ever won in the series

Total drivers from each nation participating (186 total drivers): 
40 drivers – France
26 drivers – Great Britain
21 drivers – USA
16 drivers – Italy
11 drivers – Denmark
10 drivers - Switzerland
6 drivers – Brazil, Germany, Holland, Belgium
5 drivers – Japan
4 drivers – Portugal
3 drivers – Australia, New Zealand, Mexico, Austria
2 drivers – Argentina, Poland, South Africa, Spain, Canada, Ireland
1 driver – China, Indonesia, Slovakia, Finland, Sweden

Hypercar – 15 drivers, 8 nations (0 debutants)
•    France – 5 – Lapierre, Vaxiviere, Pla, Dumas, Mailleux
•    Brazil – 2 –  Negrao, Derani
•    GBR – 2 – Conway, Westbrook
•    Japan – 2 – Kobayashi, Hirakawa
•    Argentina – 1 – Lopez
•    Australia – 1 – Briscoe
•    New Zealand – 1 – Hartley
•    Switzerland – 1 – Buemi

LMP2 –  81 drivers, 19 nations (30 debutants)
•    France – 25 – Wadoux, Ogier, Milesi, Glorieux, Cougnaud, Collard, Bourdais, Cimadomo, Cresp, Palette, de Gerus, JB Lahaye, M Lahaye, Heriau, Trouillet, Page, Droux, Nato, Vautier, Lafargue, Chatin, Pilet, Canal, Jamin, Perrodo
•    GBR – 11 – Cullen, Hanson, Lynn, Jarvis, Bell, Hanley, Jones, Bradley, Brundle, Stevens, Aitken
•    USA – 7 – Cameron, Owen, Pierson, Sales, Taylor, Thomas, Falb
•    Switzerland – 5 – Deletraz, Muller, Beche, Ineichen, Scherer
•    Denmark – 4 – Jensen, Rasmussen, Heinemeier Hansson, Nielsen
•    Germany – 4 – Horr, Rast, Kruetten, Florsch
•    Holland – 4 – van der Helm, Frijns, Viscaal, van Uitert
•    Italy – 3 – Colombo, Bortolotti, Rovera
•    Mexico – 3 – Rojas, Gutierrez, Gonzalez
•    Portugal – 3 – Albuquerque, da Costa Andrade
•    Austria – 2 – Habsburg, Binder
•    Brazil – 2 – Nasr, Fittipaldi
•    Poland – 2 – Kubica, Smiechowski
•    Australia – 1 - Allen
•    Belgium – 1 - Vanthoor
•    China – 1 – Ye
•    Indonesia – 1 – Gelael
•    Slovakia – 1 – Konopka
•    South Africa – 1 – Aberdein

GTE Pro –  21 drivers,  11 nations (1 debutant)
•    Italy – 4 – Pier Guidi, Fuoco, Rigon, Bruni
•    GBR – 4 – Calado, Tandy, Sims, Bird
•    Brazil – 2 – Serra, Fraga
•    France – 2 – Makowiecki, Estre
•    Spain – 2 – Molina, Garcia
•    USA – 2 – Taylor, Milner
•    Austria – 1 – Lietz
•    Belgium – 1 – Vanthoor
•    Denmark – 1 – Christensen
•    Holland – 1 – Catsburg
•    New Zealand – 1 – van Gisbergen
 

GTE Am –  69 drivers, 19 nations (21 debutants)
•    USA – 12 – Mann, Keating, Iribe, Grunewald, Kvamme, Hart, MacNeil, Merrill, Heistand, Poordad, Lindsey, Ferriol
•    GBR – 9 – Cameron, Millroy, Barnicoat, Tincknell, Wainwright, Barker, Pittard, Legge, Fagg
•    Italy – 9 – Cairoli, Castellacci, Schiavoni, Balzan, Giammaria, Prette, Cressoni, Fisichella, Pera
•    France – 8 – Ledogar, Klein, Abril, Dezoteux, Ragues, Aubry, Priaulx, Andlauer
•    Denmark – 6 – Sorensen, Pedersen, Schandorff, Jensen, Gatting, Thiim
•    Belgium – 4 – Hook, Bovy, Heylen, de Leener
•    Switzerland – 4 – Ulrich, Leutwiler, Flohr, Frey
•    Japan – 3 – Kimura, Hoshino, Fujii
•    Canada – 2 – Robichon, Dalla Lana
•    Germany – 2 – Ehret, Ried
•    Ireland – 2 – Griffin, Fassbender
•    Argentina – 1 – Varrone
•    Australia – 1 - Campbell
•    Finland – 1 – Vilander
•    Holland – 1 – van der Zande
•    New Zealand – 1 – Cassidy
•    Portugal – 1 – Chaves
•    South Africa – 1 – Perel
•    Sweden – 1 – West

Info based on nationality of license stated on the entry list, as opposed to nationalities a driver identifies as elsewhere, or flags they were listed against on previous entry lists. 

With thanks to 'Magic Alex' @wecdata