Clausena is a genus of flowering plants in the citrus family, Rutaceae. It was first defined by the Dutch botanist Nicolaas Laurens Burman in 1768. It is distributed in Africa, southern Asia, Australia, and the Pacific Islands.

This genus is in the subfamily Aurantioideae, which also includes genus Citrus. It is in the subtribe Clauseninae, which are known technically as the remote citroid fruit trees.