Wantirna is a suburb in Melbourne, Victoria, Australia, 24 km east of Melbourne's Central Business District, located within the City of Knox local government area. Wantirna recorded a population of 14,237 at the 2021 census. Its name is derived from the local aboriginal people’s expression for, "a gurgling stream". The Knox Private Hospital, Westfield Knox shopping centre, and Kieran are located in Wantirna.