Horsham () is a regional city in the Wimmera region of western Victoria, Australia. Located on a bend in the Wimmera River, Horsham is approximately northwest of the state capital Melbourne. In June 2018, Horsham had an estimated population of 16,514. It is the most populous city in Wimmera, and the main administrative centre for the Rural City of Horsham local government area. It is the eleventh largest city in Victoria after Melbourne, Geelong, Ballarat, Bendigo, Wodonga, Mildura, Shepparton, Warrnambool, Traralgon, and Wangaratta.