- Dustin Hoffman as Benjamin Braddock
- Anne Bancroft as Mrs. Robinson
- Katharine Ross as Elaine Robinson
- William Daniels as Mr. Braddock
- Murray Hamilton as Mr. Robinson
- Elizabeth Wilson as Mrs. Braddock
- Buck Henry as Room Clerk
- Brian Avery as Carl Smith
- Walter Brooke as Mr. McGuire
- Norman Fell as Mr. McCleery
- Alice Ghostley as Mrs. Singleman
- Marion Lorne as Miss DeWitte
Richard Dreyfuss makes a brief, uncredited appearance in his second film role as one of the tenants in Mr. McCleery's building. Ben Murphy also has an uncredited appearance, as the shaving fraternity brother who comes out with a double entendre. Mike Farrell was uncredited as a hotel bellhop.
