The Parliament House in Sydney is a heritage-listed complex of buildings housing the Parliament of the state of New South Wales, Australia. The building is located on the east side of Macquarie Street in Sydney, the state capital. The façade consists of a two-storey Georgian building, the oldest public building in the City of Sydney, flanked by two neo-gothic additions containing the parliamentary chambers. These buildings are linked to a 1970s 12-storey block at the rear, facing onto the Domain. It is also known as Parliament of New South Wales, Parliamentary Precincts and the Rum Hospital.

The Parliament of New South Wales, formally the Legislature of New South Wales, is the bicameral legislative body of the Australian state of New South Wales (NSW). It consists of the monarch, the New South Wales Legislative Assembly and the New South Wales Legislative Council. Each house is directly elected by the people of New South Wales at elections held approximately every four years. The legislative authority of the parliament derives from section 5 of the Constitution Act 1902 (NSW). The power to make laws that apply to New South Wales is shared with the Federal Parliament. The houses of the New South Wales Parliament follow the Westminster parliamentary traditions of dress, Green–Red chamber colours and protocols. The houses of the legislature are located in Parliament House on Macquarie Street, Sydney.