Myponga is a settlement in South Australia. At the 2016 census, the locality had a population of 744, of whom 393 lived in its town centreā¦Myponga is a settlement in South Australia. At the 2016 census, the locality had a population of 744, of whom 393 lived in its town centre. Myponga is located within the federal division of Mayo, the state electoral district of Mawson, and the local government area of the District Council of Yankalilla.