Trailer
 | Jeremy Renner as Jeffrey Dahmer |
 | Bruce Davison as Lionel Dahmer |
 | Artel Great as Rodney |
 | Matt Newton as Lance Bell |
 | Dionysio Basco as Khamtay |
 | Kate Williamson as Grandma |
 | Lily Knight as Mrs. Dahmer |
 | Christina Payano as Letitia |
| Tom'ya Bowden as Shawna |
 | Sean Blakemore as Corliss |
| Mickey Swenson as Officer Phillips |
| Julius Branca as Officer Powell |
| Pierson Blaetz as Officer Martin |
| Vincent Zangari as Ohio Officer |
| Xavier Lawrence as Young Man in Bar |
 | David Manis as Shop Steward |
| Steve Keyes as New Guy |
| Daniel McInerney as Bartender |
| Archie Howard as Bouncer 1 |
| Damian Forester as Bouncer 2 |
| Christopher Louis as Corpse |
 | Beau Clark as Party Kid (uncredited) |
| Directing | |
| David Jacobson | Director |
Editing | |
| Bipasha Shom | Editor |
Costume & Make-Up | |
| Dana Kay Hart | Costume Design |
Camera | |
| Christopher Manley | Director of Photography |
Art | |
| Eric Larson | Production Design |
Production | |
| Ricki Maslar | Casting |
| Larry Rattner | Producer |
Art | |
| Kelley Wright | Art Direction |
Production | |
| Leonard Shapiro | Executive Producer |
| Tim Swain | Executive Producer |
| Matthew R. Brady | Line Producer |
| Susan R. Rodgers | Co-Producer |
Writing | |
| David Jacobson | Writer |
Sound | |
| Christina Agamanolis | Original Music Composer |
| Mariana Bernoski | Original Music Composer |
| Willow Williamson | Original Music Composer |
