Polyalthia is a genus of flowering plants in the family Annonaceae.

There are approximately 90 species distributed from Africa to Asia and the Pacific.

[1] The name Polyalthia is derived from a combination of Greek words meaning 'many cures' with reference to the medicinal properties of certain species.

[2] This large genus was known to be polyphyletic, with many species having been separated and reassigned to other genera.

As of January 2025[update], Plants of the World Online accepts the following 98 species:[5] According to Plants of the World Online, species have been placed in the following genera: