Marder may refer to :
- Marder (animal), German name for European Pine Marten (Martes martes)
- Marder (tribe), a tribal union in Prehistoric Armenia
- a series of German tank destroyers from World War II:
- Marder I
- Marder II
- Marder III
- Marder (IFV) or Schützenpanzer Marder, a modern German infantry fighting vehicle
- Marder (midget submarine), a German World War II midget submarine
- Marder (Zoids), a mecha from the Zoids fictional universe
- Eve Marder, American neuroscientist
- Arthur Marder, American historian