Abstract : In order to search for alternative natural products to limit the risk of chemical pesticides used to fight against mosquitoes, an ethnobotanical survey was carried out during three months between March and May (2023), on plants presumed to have insecticidal activities against mosquitoes, in Setif region (Algerian High Plains). Selected informants (N = 71) were a combination of male (40, 85%) and female (59,25%). Our results allowed to identify 28 potentially plant species, belnging to 14 families. Lamiaceae was the most represented family by 7 species. The results also show that the leaves were the most used part (56%), and the raw plant is the most used method (59%). The information obtained constitutes a database of plants used in the east of Algeria. This study will provide the basis for further studies in developing new, effective, safe and affordable plant-derived mosquito repellents. The study also plays a part in documenting and conserving traditional knowledge of mosquito repellent plants for future use.