Xanthosia kochii is a species of erect, perennial shrub in the family Apiaceae and is endemic to the south-west of Western Australia.

[2] This species was first formally described in 1911 by Ernst Georg Pritzel, who gave it the name Trachymene kochii in Repertorium Specierum Novarum Regni Vegetabilis, from specimens collected near Watheroo by Max Koch in 1905.

[3][4] In 2013, J.M.Hart and Murray Henwood transferred the species to Xanthosia as X. kochii in the journal Telopea.

[5] The specific epithet (kochii) honours the collector of the type specimen.

[6] This species of xanthosia grows under thickets of species of Allocasuarina, Melaleuca and Acacia between Jibberding, Tardun, Mount Gibson and Yandanooka in the Avon Wheatbelt, Geraldton Sandplains, and Yalgoo bioregions of south-western Western Australia and is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.