Robert David Silk was an English priest of the Roman Catholic Church. He was formerly an Anglican bishop and was the Bishop of Ballarat in the Anglican Church of Australia.

The Diocese of Ballarat is a diocese of the Anglican Church of Australia, which was created out of the Diocese of Melbourne in 1875. It is situated in the Ballarat region of the state of Victoria, Australia and covers the south-west region of the state. The diocesan cathedral is the Cathedral of Christ the King in Ballarat. Garry Weatherill, formerly the Bishop of Willochra between 2000 and 2011, was installed as the 10th Bishop of Ballarat on 5 November 2011.