Wollongong ( ), informally referred to as "The Gong", is a seaside city located in the Illawarra region of New South Wales, Australia. Wollongong lies on the narrow coastal strip between the Illawarra Escarpment and the Pacific Ocean, 82 kilometres (51 miles) south of Sydney. Wollongong's Statistical District has a population of 292,190 (2010 est.), making Wollongong the third largest city in New South Wales after Sydney and Newcastle, and the tenth largest city in Australia.