The Anglican Diocese of St Arnaud was a diocese of the Church of England in Australia (now the Anglican Church of Australia), in the Mallee and Wimmera regions of north-west Victoria. It was created in 1926 out of the Diocese of Ballarat and named after the town of St Arnaud. In 1976 it was amalgamated into the Diocese of Bendigo.
Incomplete list
The cathedral church was Christ Church, St Arnaud, now known as Christ Church Old Cathedral. The church was designed by F. M. Moore and built in 1864 in a Victorian unpainted brick Early English Gothic style.