Austin Ernst (born January 31, 1992) is an American professional golfer on the LPGA Tour.

She played two years for the LSU Tigers, where she won three events including the individual 2011 NCAA Division I Championship.

[1] In 2014, Ernst won the Portland Classic on the first playoff hole over In-Kyung Kim.

[2] In August 2020, Ernst won the Walmart NW Arkansas Championship, for her second LPGA Tour title.

[3] Ernst announced her "semi-retirement" from tournament play in June 2023 due to a lingering neck injury.