EN
New records of 18 species of the family Hydraenidae from Poland are reported. The occurrence of two species: Hydraena schuleri GANGL. and Ochthebius dilatatus STEPH. is confirmed in Poland. New localities of 11 rare species are presented. H. britteni JOY, H. melas DALLA TORRE, and H. truncata REY are newly reported from the Western Sudety Mts., H. excisa KIESENW. is newly reported from the Wielkopolska-Kujawy Lowland, Limnebius aluta BEDEL is new for the Pomeranian Lakeland, L. truncatellus (THUNBERG) is new for the Tatra Mts., Hydraena schuleri GANGLBAUER is new for the Bieszczady Mts. and O. dilatatus STEPHENS is new for the Baltic Coast region. A critical list of species recorded from Poland is presented and discussed.