The Wiilman were an indigenous Australian tribe of Western Australia.
The Wiilman occupied an estimated 6,700 square miles (17,000 km2) of tribal territory. Their lands took in Wagin and Narrogin, the Collie, Hotham, and Williams Rivers west to Collie. Starting from Wuraming, the northern frontiers lay up round Gnowing, Dattening, and Pingelly. Their eastern territory reached Wickepin, Dudinin and Lake Grace. Their southern extension went as far as Nyabing (Nampup), Katanning, Woodanilling and Duranilling.
Edith Hassell wrote extensively on the "Wheelman tribe", her term for the Wiilman, but her manuscript was neglected until the American anthropologist Daniel Sutherland Davidson came across it while examining Australian archives in 1930 and subsequently published it over 1934-1935 in Folklore. According to Norman Tindale, much of the material ascribed to the Wiilman was actually gathered from their Koreng neighbours, and reflects their particular culture.