First data on the genus Tachydromia Meigen from Australia are provided including descriptions of five new species: T. australiensis n.sp. (New South Wales), T. bickeli n.sp. (New South Wales), T. carnarvonensis n.sp. (Queensland), T. corticola n.sp. (New South Wales, Queensland), T. nowendociensis n.sp. (New South Wales). Hypothesized phylogenetic relationships of the new species (also T. papuana Grootaert known from Papua New Guinea) are briefly discussed. A key to Australasian Tachydromia is provided.