South Yunderup is a township near Mandurah, Western Australia, located on the south bank of the Murray River within the Shire of Murray. Its postcode is 6208, and in the 2011 Census, it had a population of 2,235 with a median age of 50. South Yunderup is also the second-largest township in the Shire of Murray after the main town, Pinjarra. From Wikipedia