Ehrhardt is Old High German for "Ehre" = honour and "hard" = strong. It may refer to:
- Ehrhardt, South Carolina
- Ehrhardt (automobile), a German automobile
- Marinebrigade Ehrhardt, a Freikorps group after World War I
- Hermann Ehrhardt, the German Freikorps commander after whom the Marinebrigade Ehrhardt was named
- Ehrhardt (surname)
- Ehrhardt (typeface), an old-style serif typeface used in many books
- Tom Ehrhardt, former American football quarterback