Diploria is a genus of massive reef building stony corals in the family Faviidae, commonly known as the brain corals. Three species are currently recognized, all found in the West Atlantic Ocean and Caribbean Sea.
The World Register of Marine Species lists the following species: 
- Diploria clivosa (Ellis & Solander, 1786) - (knobby brain coral)
- Diploria labyrinthiformis (Linnaeus, 1758) - (Grooved brain coral)
- Diploria strigosa (Dana, 1846) - (Symmetrical brain coral)
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