铁木属（学名：Ostrya）是榛木科下的一个属，为落叶小乔木植物。该属共有7种，分布于美洲、欧洲和亚洲。

Ostrya is a genus of eight to 10 small deciduous trees belonging to the birch family Betulaceae. Its common name is hophornbeam in American English and hop-hornbeam in British English. It may also be called ironwood, a name shared with a number of other plants.