Geelong (dʒᵻˈlɒŋ ) (Wathawurrung: Djilang/Djalang) is a port city in the southeastern Australian state of Victoria, located at the eastern end of Corio Bay (the smaller western portion of Port Phillip Bay) and the left bank of Barwon River, about southwest of Melbourne, the state capital of Victoria. Geelong is the second largest Victorian city (behind Melbourne) with an estimated urban population of 268,277 as of June 2018, and is also Australia's second fastest-growing city. Geelong is also known as the "Gateway City" due to its critical location to surrounding western Victorian regional centres including Ballarat in the northwest, Torquay, Great Ocean Road and Warrnambool in the southwest, Hamilton, Colac and Winchelsea to the west, providing a transport corridor past the Central Highlands for these regions to the state capital Melbourne in its northeast. The City of Greater Geelong is also a member of the Gateway Cities Alliance in partnership with Councils from Newcastle and Wollongong. Geelong is the administrative centre for the City of Greater Geelong municipality, which is Port Phillip's only regional metropolitan area, and covers all the urban, rural and coastal reserves around the city including the entire Bellarine Peninsula and running from the plains of Lara in the north to the rolling hills of Waurn Ponds to the south, with Corio Bay to the east and the Barrabool Hills to the west. The traditional owners of the land on which Geelong sits are the Wadawurrung (also known as Wathaurong) Aboriginal people of the Kulin nation. The Wadawurrung Traditional Owners Aboriginal Corporation is the Registered Aboriginal Party for the region. The modern name of Geelong, established in 1827, was derived from the local Wadawurrung name for the region, Djilang, thought to mean "land", "cliffs" or "tongue of land or peninsula". The area was first surveyed by the European settlers in 1838, three weeks after Melbourne. A town post office was opened by June 1840, the second to open in the Port Phillip District.