| Judy Garland | Dorothy Gale |
| Frank Morgan | Professor Marvel / The Wizard of Oz / The Gatekeeper / The Carriage Driver / The Guard |
| Ray Bolger | Hunk / The Scarecrow |
| Bert Lahr | Zeke / The Cowardly Lion |
| Jack Haley | Hickory / The Tin Man |
| Billie Burke | Glinda |
| Margaret Hamilton | Miss Gulch / The Wicked Witch of the West |
| Charley Grapewin | Uncle Henry |
| Pat Walshe | Nikko |
| Clara Blandick | Auntie Em |
| Terry | Toto (as Toto) |
| The Singer Midgets | The Munchkins (also as The Munchkins) |
| Dorothy Barrett | Emerald City Manicurist (uncredited) |
| Amelia Batchelor | Inhabitant of Emerald City (uncredited) |
| Charles Becker | Munchkin Mayor (uncredited) |
| Billy Bletcher | Mayor / Lollipop Guild (voice) (uncredited) |
| Lorraine Bridges | Ozmite / Lullaby League (voice) (uncredited) |
| Buster Brodie | Winged Monkey (uncredited) |
| Tyler Brooke | Ozmite (uncredited) |
| Candy Candido | The Angry Apple Tree (voice) (uncredited) |
| Mickey Carroll | Munchkin Fiddler (uncredited) |
| Adriana Caselotti | Juliet (voice) (uncredited) |
| Harry Cogg | Winged Monkey (uncredited) |
| Pinto Colvig | Munchkin Voices (uncredited) |
| Tommy Cottonaro | Bearded Munchkin (uncredited) |
| Jimmy the Crow | Crow in Cornfield (uncredited) |
| Billy Curtis | Munchkin City Father (uncredited) |
| Paul Dale | Lollipop Guild (uncredited) |
| Ken Darby | Munchkinland Mayor (voice) (uncredited) |
| Sid Dawson | Winged Monkey (uncredited) |
| Abe Dinovitch | Apple Tree / Munchkin (voice) (uncredited) |
| Jon Dodson | Lollipop Guild (voice) (uncredited) |
| Gracie Doll | Munchkin Villager (uncredited) |
| Tiny Doll | Munchkin Villager (uncredited) |
| Daisy Earles | Munchkin Villager (uncredited) |
| Harry Earles | Lollipop Guild Member (uncredited) |
| Fern Formica | Munchkin Villager / Sleepyhead (uncredited) |
| Sig Frohlich | Winged Monkey (uncredited) |
| Phil Harron | Winkie (uncredited) |
| Charles Irwin | Tin Polisher (uncredited) |
| Lois January | Emerald City Manicurist (uncredited) |
| Eleanor Keaton | Ozmite (uncredited) |
| The King's Men | Munchkin Voices (uncredited) |
| Karl 'Karchy' Kosiczky | Munchkin Herald #1 / Sleepyhead (uncredited) |
| Nita Krebs | Lullaby League Member (uncredited) |
| Ethelreda Leopold | Emerald City Manicurist (uncredited) |
| Mitchell Lewis | Captain of the Winkie Guard (uncredited) |
| Bud Linn | Lollipop Guild (voice) (uncredited) |
| Jerry Maren | Lollipop Guild Member (uncredited) |
| Dona Massin | Emerald City Manicurist (uncredited) |
| George Ministeri | Munchkin Coach Driver (uncredited) |
| Yvonne Moray | Lullabye League Member (uncredited) |
| Lee Murray | Winged Monkey (uncredited) |
| Olga Nardone | Lullabye League Dancer - Center (uncredited) |
| George Noisom | Winged Monkey (uncredited) |
| Jack Paul | Winged Monkey (uncredited) |
| Margaret Pellegrini | Munchkin Villager / Sleepyhead (uncredited) |
| Meinhardt Raabe | Munchkin Coroner (uncredited) |
| Freddie Retter | Munchkin Fiddler (uncredited) |
| 'Little Billy' Rhodes | Munchkin Barrister (uncredited) |
| The Rhythmettes | Themselves (uncredited) |
| Elvida Rizzo | Ozmite (uncredited) |
| Rad Robinson | Munchkin Coroner (voice) (uncredited) |
| Ruth L. Robinson | Munchkin Villager (uncredited) |
| Ambrose Schindler | Winkie (uncredited) |
| Helen Seamon | Woman with Cat (uncredited) |
| Rolfe Sedan | Oz Balloon Ascensionist (uncredited) |
| Oliver Smith | Ozmite (uncredited) |
| Robert St. Angelo | Winkie (uncredited) |
| Parnell St. Aubin | Munchkin Soldier (uncredited) |
| Ralph Sudam | Ozmite (uncredited) |
| August Clarence Swenson | Munchkin Soldier (uncredited) |
| Frank Whitbeck | Trailer Announcer (voice) (uncredited) |
| Harry Wilson | Winkie (uncredited) |
| Johnny Winters | Munchkin Navy Commander (uncredited) |
