Maesa is a genus of flowering plants. It is placed in the family Primulaceae, subfamily Maesoideae, for which it is the sole genus (monotypic). Previously it was placed in Myrsinaceae, or in a family of its own, Maesaceae. There are 184 accepted species native to tropical and subtropical Africa, Asia, and the Pacific, the majority of which occur in Malesia, New Guinea, western Asia, and the Pacific Islands.

These plants are vines, shrubs, and trees up to 12 meters tall.