I-Sidni (IsiNgisi: Sydney) yidolobha elikhulu kunawo wonke I-Ostreliya. Yinhloko-dolobha yaseNingizimu Entsha I-Wales. Inabantu abangaphezu kwe-5,300,000 kusukela ngo-2021. Le-athikhili iyisigcino (isiNgisi: "a stub"). Ungakwazi ukusiza uWikipedia: ngokuyikhulisa.