Diagnostic characters of the family Mymaridae, together with diagnosis and keys to the Egyptian genera of the family-based upon the external morphological characters of the adult female and male are presented with illustrations to facilitate their recognition. Synonyms, taxonomic notes, hosts, and habitat of the genera together with their representative species in Egypt are also provided to give general picture and high light on the occurrence, diversity, and distribution of the mymarids in Egypt. The study based on the materials kept in the main reference insect collections in Egypt, and the available literature.