The term Diocese of Canada may refer to:
- Serbian Orthodox Diocese of Canada, Canadian diocese of the Serbian Orthodox Church
- Serbian Orthodox Diocese of America and Canada, former diocese (1921-1963) of the Serbian Orthodox Church, in the US and Canada
- Serbian Orthodox Diocese of Eastern America and Canada, former diocese (1963-1983) of the Serbian Orthodox Church, in eastern USA and Canada
- Free Serbian Orthodox Diocese of America and Canada, former diocese (1963-1991) of the "Free Serbian Orthodox Church", in USA and Canada
- Diocese of America and Canada (Metropolitanate of New Gračanica), former diocese (1991-2009) of the Serbian Orthodox Metropolitanate of New Gračanica
- Romanian Orthodox Diocese of Canada, Canadian diocese of the Romanian Orthodox Church
- Russian Orthodox Diocese of Montreal and Canada, Canadian diocese of the Russian Orthodox Church Outside Russia
- Ukrainian Orthodox Diocese of Central Canada, one of dioceses of the Ukrainian Orthodox Church of Canada
- Ukrainian Orthodox Diocese of Eastern Canada, one of dioceses of the Ukrainian Orthodox Church of Canada
- Ukrainian Orthodox Diocese of Western Canada, one of dioceses of the Ukrainian Orthodox Church of Canada
- Macedonian Orthodox Diocese of America and Canada, a diocese of the Macedonian Orthodox Church
- Armenian Diocese of Canada (Cilicia), Canadian diocese of the Armenian Apostolic Church, under the Holy See of Cilicia
- Assyrian Diocese of Canada, Canadian diocese of the Assyrian Church of the East