Blue crab may refer to:
- Callinectes sapidus – Chesapeake or Atlantic blue crab of the West Atlantic, introduced elsewhere
- Cardisoma guanhumi – blue land crab of the West Atlantic
- Discoplax celeste – blue land crab of Christmas Island
- Paralithodes platypus – blue king crab of the North Pacific
- Portunus pelagicus – blue swimmer crab of Australia and Southwest Pacific
- Portunus trituberculatus – Japanese blue crab of the Northwest Pacific
|This article includes a list of related items that share the same name (or similar names).
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