铁苋菜属（学名：Acalypha）是大戟科下的一个属，为草本、灌木或乔木植物。该属共有约450种，分布于热带和亚热带地区。

Acalypha is a genus of flowering plants in the family Euphorbiaceae. It is the sole genus of the subtribe Acalyphinae. It is one of the largest euphorb genera, with approximately 450 to 462 species. The genus name Acalypha is from the Greek akalephes ("nettle"), and was inspired by the nettle-like leaves. General common names include copperleaf.