The Hungry Mile in Sydney has been formally re-named as an official urban space, three years after the name was announced.

The Hungry Mile will includes the section of Hickson Road between the Munn Street overbridge and the Napoleon Street intersection located mainly in the suburbs of Barangaroo and Millers Point.

"The Hungry Mile takes its rightful place on the map today - for generations to come it will serve as a reminder of the contribution made by maritime workers," premier Nathan Rees said.

"The name 'The Hungry Mile' is a link between the area and the Great Depression, when workers went from wharf to wharf in search for work, if they found work it meant money for food and shelter for them and their families, but failure meant going home hungry," said Lord Mayor Clover Moore MP.

"The Hungry Mile was a place of real struggle - for livelihoods, but also for principles. It was a tough place that bred tough and enduring people. In retaining its name and its memories, we are not romanticising an often degrading and inhuman system," Moore said.

"This is about working class culture and history," said Maritime Union of Australia national secretary Paddy Crumlin.

The proposal does not change Barangaroo as the suburb at east Darling Harbour but officially recognises the name of The Hungry Mile as part of Barangaroo.

Barangaroo is named after an important indigenous woman from Sydney's early history who was a leading figure in the story of the first colonisation of Australia and the wife of Bennelong, after whom Bennelong Point - the site of the Sydney Opera House - is named.