Roger Corman averages 5.38 across 4 rated films as an actor, ahead of Jonathan Haze at 4.69.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
| Monster from the Ocean Floor | 1954 | 3.8 | as Tommy, Producer | as Joe |
| Five Guns West | 1955 | 5.2 | Director, Producer | as William Parcell 'Billy' Candy |
| Day the World Ended | 1955 | 5.4 | Director, as Nelson - Louise's Fiancee in Framed Photograph, Producer | as Contaminated Man |
| Swamp Women | 1956 | 3.4 | Director | as Charlie the Pickpocket |
| Gunslinger | 1956 | 3.9 | Director, Producer | as Jake Hayes |
| It Conquered the World | 1956 | 5.0 | Director, Producer | as Pvt. Manuel Ortiz |
| Not of This Earth | 1957 | 6.1 | Director, Producer | as Jeremy Perrin |
| Rock All Night | 1957 | · | Producer, Director | as Joey |
| The Saga of the Viking Women and Their Voyage to the Waters of the Great Sea Serpent | 1957 | 3.5 | Director, Producer | as Ottar |
| Teenage Cave Man | 1958 | 3.6 | Director, Producer | as The Curly-Haired Boy |
 The Little Shop of Horrors | 1960 | 6.2 | Director, Writer, Producer | as Seymour Krelborn |
| The Terror | 1963 | 5.1 | Producer, Writer, Director | as Gustaf |
