Reef may refer to:
- Crandor Reefs, a vast reef network surrounding the island of Crandor
- Luke's Reef, a small saltwater reef found in the Eastern Sea
- The Other 50% Reef, an Eastern Sea reef well-known for its extremely sharp coral specimens
- Tenner Reef, a penguin holiday destination
- The Mogre Camp, a reef-covered location of the Karamjan coast visited during Recipe for Disaster
- The Shadow Reef, the third Elite Dungeon set in Ulthven Kreath.