Sydney-Lang was a former electoral district of the Legislative Assembly in the Australian state of New South Wales, created in 1894 from part of the electoral district of West Sydney in inner Sydney and named after Presbyterian clergyman, writer, politician and activist John Dunmore Lang. It was west of George Street, generally south of Margaret Street, north of Hay Street and east of Darling Harbour. It was abolished in 1904 and absorbed into Darling Harbour.
Future Prime Minister of Australia Billy Hughes was the member for Sydney-Lang from 1894 to 1901, when he resigned to enter the newly established Federal parliament.