The Microcerberidae are a family of isopod crustaceans. They are less than 2 mm (0.079 in) long, and live interstitially in shallow marine or freshwater sand habitats.

Marine microcerberids comprise the main part species diversity, but are very alike. As a group, they have very broad distribution:

• the majority of Coxicerberus: Americas, southern coasts of Europe, Africa, warm waters of Asia, New Zealand
• "Microcerberus" monodi: Angola

Freshwater taxa are less abundant in species number (only 12 species), but are more morphologically diverse and include seven or eight genera. They have these distributions:

• Afrocerberus and Protocerberus: central and southern Africa
• Bulgarocerberus: Bulgaria
• Isoyvesia: Cuba
• Mexicerberus: Mexico
• Microcerberus: South Carolina, Romania, Bulgaria and Macedonia
• "Microcerberus" remyi: Morocco
• Coxicerberus ruffoi: northern Italy

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