The Diocese of Kalgoorlie was a diocese of the Church of England in Australia (now the Anglican Church of Australia^[1]). It covered much of the Goldfields-Esperance region in Western Australia, and existed from the consecration of its first bishop in 1914^[2] until its re-absorption back into the Anglican Diocese of Perth in 1973.^[3] At that point the Kalgoorlie diocese was reported to contain only eight parishes, and was financially unviable as a separate entity.^[4]

The cathedral was St John the Baptist, Kalgoorlie, which before and after the separate existence of the diocese was the parish church of Kalgoorlie.^[5]