Claoxylon is a flowering plant genus in the spurge family, Euphorbiaceae, comprising dioecious subshrubs to small trees.

[2] The genus is distributed in paleotropical areas: Madagascar through South and Southeast Asia, Malesia to Melanesia, Hawaiʻi, and Australia.

Half of the species are in Malesia.

As of December 2024[update], the following 118 species are accepted by Plants of the World Online:[1]

Moved to other genera (Acalypha, Croton, Discoclaoxylon, Erythrococca, Lobanilia, Macaranga, Mallotus, Micrococca, Orfilea)[3]