Documentaries were the first types of films to break through the hardcore feature barrier in 1969. SEX U.S.A. highlights the frank, open, and revolutionary sexual attitudes of the time.
| Actor | Role |
|---|---|
| BBarbara BennerBisexual Blonde | Bisexual Blonde |
| BBetty BombedOrgy Girl with Ponytail | Orgy Girl with Ponytail |
 Gerard DamianoHimself - Interviewer | Himself - Interviewer |
| JJune DuluOrgy Girl in Blue Top | Orgy Girl in Blue Top |
| BBerton GoldwaterHimself - Attorney | Himself - Attorney |
| BBarbara GrumetBisexual Brunette | Bisexual Brunette |
| HHelen LangBrunette Orgy Girl | Brunette Orgy Girl |
 Fred J. LincolnFirst Guy Having Sex | First Guy Having Sex |
| PPaul MatthewsHimself | Himself |
| JJack NicholsHimself - Editor | Himself - Editor |
 Darby Lloyd RainsOrgy Girl in Boots | Orgy Girl in Boots |
 Harry ReemsGuy with Bisexual Girls | Guy with Bisexual Girls |
 Jason RussellOrgy Guy - Tan Collarless Shirt | Orgy Guy - Tan Collarless Shirt |
 Tina RussellFirst Girl Having Sex | First Girl Having Sex |
| SSam SpacedOrgy Guy with Ponytail | Orgy Guy with Ponytail |
| RRon WertheimHimself - Filmmaker | Himself - Filmmaker |
| MMartin AndersonNot listed | Not listed |
| AArlene AuberNot listed | Not listed |