Ronald Austin Mulkearns (11 November 1930 – 3 April 2016) was the bishop emeritus of the Roman Catholic Diocese of Ballarat in Ballarat, Australia, a diocese in the ecclesiastical province of Melbourne.
He resigned as bishop on 30 May 1997.
The Royal Commission into Institutional Responses to Child Sexual Abuse found that Mulkearns was "derelict in his duty".