This study was conducted in Adana, Gaziantep, Hatay, Kahramanmaras, Kilis and Osmaniye provinces of the Eastern Mediterranean Region between the years of 2011 and 2013. In this study, it was attempted to describe 51 species which were determined to belong to the five families. Of all these species, 41 were from Dytiscidae, 1 species was from Gyrinidae, 6 species were from Haliplidae, 2 species were from Noteridae, and 1 species was from Spercheidae. Two of them were new records for Turkey (Hydroporus scalesianus and Hydrovatus acuminatus), two species were also second record for Turkey (Haliplus fulvus and Ilybius quadriguttalus) and one species was first exact locality record for Turkey (Haliplus obliquus).