Against the backdrop of mounting calls to change the date of Australia Day, thousands marched through the streets of inner Sydney for the annual Invasion Day rally.

The crowd stretched as far as the eye could see as it snaked from Redfern, down Broadway and into Victoria Park in Camperdown.

Chants of "always was, always will be Aboriginal land" echoed down the length of the march, which stretched for over 500 metres, as traffic sat stationary at Broadway, waiting for it to pass.

The march began at The Block, in Redfern, the spiritual heartland of Sydney's Indigenous community, where Aboriginal speakers addressed the crowd on the ongoing issues faced by Indigenous people, including high incarceration rates, deaths in custody, and high rates of children in state care.