Yilliminning is a small town situated in the southern Wheatbelt region of Western Australia. It is located approximately 212 kilometres (132 mi) southeast of Perth, the state capital, and sits about 23 kilometres (14 mi) east of Narrogin.
According to data from the 2006 census, the town had a population of 337 residents. It serves as a rural locality within the agricultural landscape of the Wheatbelt region.