Marah may refer to:
- Marah (plant) or Manroot, a kind of wild cucumber
- Marah (band), an American rock band
- Marah (Bible), one of the locations which the Torah identifies as having been travelled through by the Israelites during the Exodus
- Marah is a surname of Belgian popular singer Micha Marah.
- Marah is a variant of the Irish name O'Meara