Cedric Hardwicke

Dr. Ludwig Frankenstein / Dr. Henry Frankenstein (ghostly image)

Ralph Bellamy

Erik Ernst

Lionel Atwill

Dr. Bohmer

Bela Lugosi

Ygor

Evelyn Ankers

Elsa Frankenstein

Lon Chaney Jr.

The Frankenstein Monster

Barton Yarborough

Dr. Kettering

Doris Lloyd

Martha the Housekeeper

Leyland Hodgson

Chief Constable

Olaf Hytten

Adolph Hussman

Holmes Herbert

Magistrate

Richard Alexander

Villager at Council Meeting (uncredited)

Lionel Belmore

Councilman (uncredited)

Chet Brandenburg

Villager (uncredited)

Colin Clive

Dr. Henry Frankenstein (flashback) (uncredited)

Harry Cording

Mob Leader (uncredited)

George Eldredge

Constable (uncredited)

Dwight Frye

Villager at Meeting / Grave Robber (flashback) (uncredited)

Lawrence Grant

Mayor (uncredited)

Otto Hoffman

Villager (uncredited)