Ralf Zimmermann
Ralf Zimmermann is the name of the following people:
- Ralf Zimmermann (lawyer) (* 1971), German lawyer and judge at the Federal Labor Court
- Ralf Zimmermann (soccer player) (* 1981), German soccer player
- Ralf Zimmermann von Siefart (journalist) (* 1958), German journalist
- Ralf Zimmermann von Siefart (Manager) (1925–2018), German manager of the fertilizer industry