The Marajoara or Marajó culture was an ancient pre-Columbian era civilization.
Marajoara may also refer to:
- Something from, or related to, the island of Marajó
- Marajoara gulf, a bay
- Operation Marajoara, a 1970s guerrilla counter-operation
- Marajoara (horse), a Brazilian horse breed
- A seldom used name for Curatella americana