Jamie Thomason was an American voice director for Disney.

He is best known as the head of casting for various Disney productions between 1991-2006. He has also worked on various other shows, including the final season of Hanna-Barbera's television adaptation of The Smurfs, A Pup Named Scooby-Doo, The Spectacular Spider-Man, and Bill & Ted's Excellent Adventures, which included George Carlin.

He was the voice director when Pierce Brosnan narrated The Great Discovery and the original cut of the twelfth season in Thomas & Friends, but he was replaced by Pete Atkin when Michael Angelis and Michael Brandon resumed their roles narrating for the UK and US respectively.