Robert or Bob Cobb may refer to:
- Robert W. Cobb, US government official
- Robert Cobb (American football), former American football defensive end
- Robert H. Cobb, American restaurateur, founder of the Brown Derby and purported creator of the Cobb salad
- Fictional characters
- Bob Cobb, the secret identity of Mon-El of the Legion of Superheroes when he lives in Smallville.
- Bob Cobb (Seinfeld) or "the Maestro", a minor character from the American TV sitcom Seinfeld