Maryknoll is a town in Victoria, Australia, 61 km south-east of Melbourne's Central Business District, located within the Shire of Cardinia local go…Maryknoll is a town in Victoria, Australia, 61 km south-east of Melbourne's Central Business District, located within the Shire of Cardinia local government area. Maryknoll recorded a population of 646 at the 2021 census.