King Street Bridge, Road bridge in Melbourne, Australia

King Street Bridge is a road bridge crossing the Yarra River in Melbourne with eight traffic lanes for vehicles. It connects King Street to the north with Kings Way to the south and integrates with Crown Casino's parking infrastructure and tram route connections through the city center.

The Country Roads Board called tenders in 1956 for a 120 m bridge and 570 m viaduct; Utah Australia began work in November 1957, and Premier Henry Bolte opened the main bridge on 12 April 1961. On 10 July 1962 a span collapsed under a 43-tonne semi-trailer, leading to a Royal Commission from 1962 to 1963.

The bridge plays a role in daily Melbourne life, crossed by countless commuters and integrated into the city's transport network. It connects neighborhoods and serves as a practical passage that residents and visitors use to move through the city center.

The bridge can be accessed from multiple points around King Street and Kings Way for pedestrians and vehicles alike. During peak hours in the morning and evening, traffic and crowds tend to be heavier on this crossing.

The bridge's steel girders were fabricated by J&W Johns & Waygood and supplied by BHP, but the steel was not tested for ductility as the Country Roads Board specifications required. The Royal Commission into the 1962 collapse examined this lapse, along with the use of high-tensile steel to British Standard BS 968:1941.