During the extensive recent survey, a total of 1655 specimens of Gerromorpha (Hemiptera: Heteroptera) were collected in 51 different localities belonging to five watersheds (Medjerda, North-West watershed, Joumine, Sedjenane, North-East watershed) of the North of Tunisia. Thirteen species belonging to seven genera representing five families were identified. Gerris lacustris (Linnaeus, 1758) and Hebrus montanus (Kolenati, 1857) are new records for Tunisia. The fauna of Gerromorpha from northern Tunisia is provided on the basis of the material newly collected and the collection of the Museum National d’Histoire Naturelle, Paris. All the species of Gerromorpha recorded from Tunisia are catalogued, occurrence of 5 families, 7 genera and 15 species are confirmed, occurrence of two previously recorded species (Rhagovelia nigricans nigricans (Burmeister, 1835), Limnogonus cereiventris (Signoret, 1862) is uncertain and requires confirmation.