Austin Albert Austin (23 November 1855 – 29 July 1925) was an Australian politician.
He was born in Winchelsea to pioneer grazier Thomas Austin and Elizabeth Phillips Harding. He attended Geelong Grammar School and the University of Melbourne before becoming a grazier, mostly around Elaine. On 29 August 1892 he married Winifred Cameron, with whom he had five children. He served on Meredith Shire Council from 1892 to 1893 and Buninyong Shire Council from 1908 to 1911. In 1902 he was elected to the Victorian Legislative Assembly for Grenville, serving until 1904. In 1910 he was elected to the Victorian Legislative Council for South Western Province. He was a Liberal and a Nationalist, and served until his retirement in 1925. Austin died a few months after his retirement in Geelong. He came from a political family: his brother Edwin Henry Austin, cousin Sidney Austin, nephew Edward Arthur Austin and grandson Thomas Leslie Austin were all members of the Victorian Parliament.