Nine species of water beetles of families Dytiscidae, Hydrophilidae and Dryopidae are recorded for the North Caucasus. Bidessus delicatulus (Schaum, 1844) and Oreodytes davisii (Curtis, 1831) are new for Russia and the North Caucasus, Megasternum prometheus Schatrowskij, 1990 – for Russia and the North-West Caucasus; Scarodytes halensis (Fabricius, 1787), Cercyon subsulcatus Rey, 1885 – for the Caucasus; Dryops anglicanus Edwards, 1909 – for the North Caucasus; Dryops viennensis (Laporte, 1840) – for Krasnodar Province. Records of Cercyon impressus (Sturm, 1807) and Cercyon ustulatus (Preyssler, 1790) are confirmed for the North Caucasus