Notonecta maculata Fabricius, 1794 is recorded for the first time from Romania. Five species belonging to the genus Notonecta Linnaeus, 1758 and one to the genus Anisops Spinola, 1837 are now recorded from this country. The occurrence of Anisops sardeus sardeus Herrich-Schaeffer, 1849 and N. meridionalis Poisson, 1923 is confirmed by additional records. A checklist of the Notonectidae of Romania and updated distribution maps are provided.