Australian police searching for the final member of a group who became stranded in the outback more than two weeks ago have found a body.

The body has not been identified but it is believed to be Claire Hockridge, Northern Territory Police said.

Ms Hockridge, 46, had been travelling with two others when their car got stuck in a riverbed on 19 November.

Her partner Tamra McBeath-Riley, 52, and friend Phu Tran, 40, were found alive earlier this week.