Cleidion is a plant genus of the family Euphorbiaceae, first described in 1826.

[2] It is found in tropical and subtropical regions in Asia, Africa, Australia, Latin America, and various islands of the Pacific and Indian Oceans.

[1][3][4][5][6][7][8] moved to other genera (Acalypha, Acidoton, Adenophaedra, Alchornea, Bocquillonia, Cleidiocarpon, Conceveiba, Macaranga, Orfilea, Plukenetia, Trigonostemon)