The Plagusiidae are a family of crabs, formerly treated as a subfamily of the family Grapsidae, but have since been considered sufficiently distinct to be a family in their own right. The family Plagusiidae used to include a subfamily Plagusiinae, comprising the genera Percnon and Plagusia, which constitute a widespread group of litophilic, intertidal and subtidal crabs that are notorious for their speed and their agility.

Six genera are currently included in the family:

• Caligoplagusia Fujita & Narusa, 2014
• Davusia Guinot, 2007
• Euchirograpsus H. Milne-Edwards, 1853
• Guinusia Schubart & Cuesta, 2010
• Miersiograpsus Türkay, 1978
• Plagusia Latreille, 1804

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