Sydney Trades Hall, Trade union building in Sydney, Australia.

Sydney Trades Hall is a four-storey load-bearing brick and sandstone building at the corner of Goulburn and Dixon Streets. Its five-storey octagonal corner tower is capped by a pitched copper roof with a square copper cupola. Sandstone forms the ground floor, with face brickwork, grouped window trims, string courses and a balustered parapet above. The original four bays face Goulburn Street; seven bays along Dixon Street were added later.

The building emerged from a meeting of representatives from thirteen unions in 1882 that established the foundation for this labor institution. Construction of the current structure took place between 1888 and 1895.

The building included a library and a banner room from the start, and unions that kept offices here decided to form a party to give labour a voice in Parliament after the maritime and shearers' strikes. The NSW Labor Party's origins trace to these rooms.

The building is centrally located and easily accessible by public transport in downtown Sydney. It remains an active space for union meetings and events, so visitors should check availability beforehand.

The foundation stone was laid on 28 January 1888 by Lord Carrington, the State Governor, who was also Grand Master of the United Grand Lodge of NSW. The building then took seven years to erect for lack of funds, opening on 26 January 1895.