Vo filme Dumbo hrajú Edward Brophy (Timothy Q. Mouse (voice)), Margaret Wright (Casey Jr. (voice)), Verna Felton (Elephant Matriarch / Mrs. Jumbo (voice)), Sarah Selby (Prissy the Elephant (voice)), Noreen Gammill (Catty the Elephant (voice)), Dorothy Scott (Giddy the Elephant (voice)), Herman Bing (The Ringmaster (voice)), Cliff Edwards (Dandy Crow (voice)), Jim Carmichael (Dopey Crow (voice)), Nick Stewart (Specks Crow (voice)), Hall Johnson (Deacon Crow (voice)), James Baskett (Fats Crow (voice)), Sterling Holloway (Mr. Stork (voice)), John McLeish (Narrator (voice)), Billy Bletcher (Clown (voice)), Eddie Holden (Clown (voice)), Malcolm Hutton (Skinny (voice)), Harold Manley (Boy (voice)), James MacDonald (Roaring Lion (voice)), Jack Mercer (Clowns (voice)), Tony Neil (Boy (voice)).