The territory covered by the province is roughly coterminous with the western portion of the former Hudson's Bay Company concession of Rupert's Land, as well as the North-Western Territory of British North America.
It today consists of the present day provinces of Alberta, Saskatchewan, and Manitoba, as well as the extreme western portion of Ontario and the Nunavik area of Quebec.
At almost 6.5 million square kilometres, it is the largest ecclesiastical province by area in the country, and was even larger when it was created.
The Anglican Diocese of Moosonee was joined to the Ecclesiastical Province of Ontario in 1912.
The current metropolitan of the Province of the Northern Lights is Greg Kerr-Wilson who is the Archbishop of Calgary.