This is a comprehensive list of all of the characters in the Thomas franchise, including characters from the Railway Series, Television Series, and all other forms of Thomas media. Currently there is 1137 characters in the franchise, excluding minor human and animal characters. (2479 Characters Total).
Characters that are owned by the North Western Railway company. A star indicates that the character isn't owned by the railway, but works alongside it. The buses on this list are apart of the NWR's subsidiary company "Sodor Roadways".
Rickety (Potentially Privately Owned;Image Shown is what likely inspired his Blue TWR Model).
N.C.B.*
Old Slow Coach
Rocky
Hector
Slip Coaches
Judy
Jerome
Hannah
Dexter
The Station Coach
The Play Coach
The New Coach
The Naughty Pink Truck
"Carols on Wheels"
The Elderly Brake Van
Old Bennett*
Annie and Clarabel's Old Friend (Formerly)
The Animal Sanctuary Coach*
The Old Guards Van
The Bright Truck
The Quarryman's Coach
The New Truck
The First Red Tender Engine
The Second Red Tender Engine
Bill and Ben's Triplet (Easter Egg in Hunt the Truck;Shouldn't be considered Canon).
Unknown 4-4-0 Engine
Bloomer
The Pannier Tank Engine
2-6-0 Storyboard Tank-Engine
Bertie
Algy
Bulgy
The Special Bus Service
The Open-Topped Double-Decker Bus
The Cafe Coach
Skarloey Railway
Skarloey
Rheneas
Sir Handel
Peter Sam
Rusty
Duncan
Duke
Rusty's Ghost Engine
Bertram
Mighty Mac
Proteus
Freddie
Luke
Fred (Representation)
Mark I-IV
Mark V (Representation)
Ivo Hugh
Agnes
Ruth
Lucy
Jemima
Beatrice
Cora
Ada
Jane
Mabel
Madge
Colin
Merrick
Owen
Little Giant (Cancelled Characters)
Arlesdale Railway
Rex
Mike
Bert
Frank
Jock
Sigrid of Arlesdale (Representation)
Blister I (Representation)
Blister II (Representation)
Culdee Fell Railway
Godred
Ernest
Wilfred
Culdee
Shane Dooiney
Patrick
Alaric
Eric
Catherine
The Truck
Mid Sodor Railway
Stanley
Smudger
Albert
Jim
Tim
The Mine Engine (Presumably privately-owned by the Cas-ny-Hawin Mining Company).
Gerry
Jennings
John
Atlas
Alfred
Unknown Engine Scrapped by 1904
Note: Although the identity of the engine scrapped by 1904 is unknown, there is a possibility it was either Jennings or John, if not another, completely unknown engine.