A taxonomic treatment is presented for all eight white-flowered Comesperma species that occur in tropical Australia (here defined as north of latitude 21°S). In total, eight species are circumscribed, of which five are new species and one is new subspecies, viz. C. albimontanense A.J. Ford & Halford, C. anemosmaragdinum A.J. Ford & Halford, C. minutum A.J. Ford & Halford, C. rhyoliticum A.J. Ford & Halford, C. sabulosum A.J. Ford & Halford and C. secundum subsp. oligotrichum A.J. Ford & Halford. Notes on habitat, distribution and conservation status are provided. A key to all 10 tropically distributed Comesperma species, including two non-white flowered species, is given.