Collins Street is a major street in the central business district of Melbourne, Victoria, Australia. It was laid out in the first survey of Melbourne, the original 1837 Hoddle Grid, and soon became the most desired address in the city. Collins Street was named after Lieutenant-Governor of Tasmania David Collins who led a group of settlers in establishing a short-lived settlement at Sorrento in 1803.

The Melbourne central business district is the city centre and main urban area of the city of Melbourne, Victoria, Australia, centred on the Hoddle Grid, the oldest part of the city laid out in 1837, and includes its fringes. The Melbourne CBD is located mostly in the local government area of the City of Melbourne, which also includes some of inner suburbs adjoining the CBD, while a small section extends into the City of Port Phillip.