The deadly human disease dengue is spread by the Aedes aegypti vector. Scientists have focused more attention to plant-derived products because they are a grate source of new natural compounds with insecticidal capabilities that are safe for humans and the environment. Many studies conducted over the past decade years on natural plant products against vector mosquitoes suggest they could replace chemical and synthetic pesticides as a new approach of mosquito control. In this present investigation, larvicidal activity against the A. aegypti vector was observed for crude extracts of Rivea hypocrateriformis leaf prepared in hexane, ethanol, Ethyl acetate, petroleum ether, and acetone. For a 24hrs, mortality was recorded. The larvicidal activity of petroleum ether leaf extract had highest mortality, with LC50 and LC90 values of 106.63 ppm and 399.94 ppm, respectively, after 24 hours. Plant phytochemicals can be utilized as efficient of vector control agents alone or in combination.