Data Mining : 20th Australasian Conference AusDM 2022 Western Sydney Australia December 12 15 2022 proceedings This book constitutes the refereed proceedings of the 20th Australasian Conference on Data Mining AusDM 2022 held in Western Sydney Australia during December 12 15 2022.The 17 full papers included in this book were carefully reviewed and selected from 44 submissions. They were organized in topical sections as research track and application track