The family Hydraenidae from Egypt is revised. As a result, 17 species belonging to the three genera: Hydraena Kugelann, 1794; Limnebius Leach, 1815andOchthebius Leach, 1815and  the two subfamilies: Ochthebinae and Hydraeninae are now recognized, including two new records, Hydraena arabica Balfour-Browne, 1951 and Ochthebius micans Balfour-Browne, 1951. Taxonomic keys are provided for the identification of the subfamilies, genera, and species. In addition, a diagnosis, a list of material examined, and both local and world distribution of each species are provided. Also, a map of species' distributions in Egypt, photographs of the habitus and genitalia of some species are included.