Austin played minor football for Tipperary in 2004, and under-21 football in 2006 and 2007. He made his championship debut in
2006 against
Kerry. On 31 July 2016, Austin started at corner-forward as Tipperary defeated
Galway in the
2016 All-Ireland Quarter-finals at
Croke Park to reach their first All-Ireland semi-final since 1935. On 21 August 2016, Tipperary were beaten in the semi-final by
Mayo on a 2-13 to 0-14 scoreline. On 22 November 2020, Tipperary won the
2020 Munster Senior Football Championship after a 0-17 to 0-14 win against
Cork in the final. It was Tipperary's first
Munster title in 85 years. In April 2021, Austin announced his retirement from inter-county football after 15 years. At the time of his retirement he was the longest serving member of the Tipperary panel. He was also one of the longest serving inter-county footballers. ==Honours==