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.

The Anglican Church of Australia, formerly known as the Church of England in Australia and Tasmania, is a Christian church in Australia and an autonomous church of the Anglican Communion. It is the second largest church in Australia after the Catholic Church. According to the 2016 census, 3.1 million Australians identify as Anglicans. As of 2016, the Anglican Church of Australia had more than 3 million nominal members and 437,880 active baptised members. For much of Australian history since the arrival of the First Fleet in January 1788, the church was the largest religious denomination. It remains today one of the largest providers of social welfare services in Australia.