Thunder Bay District is a district and census division in Northwestern Ontario in the Canadian province of Ontario. The district seat is Thunder Bay. In 2016, the population was 146,048. The land area is 103719.51 km2; the population density was 1.4 /km2. Most of the district (93.5%) is unincorporated and part of the Unorganized Thunder Bay District.

History

Thunder Bay District was created in 1871 by provincial statute from the western half of Algoma District, named after a large bay on the north shore of Lake Superior. Its northern and western boundaries were uncertain until Ontario's right to Northwestern Ontario was determined by the Judicial Committee of the Privy Council. Until about 1902 it was often called Algoma West from the name of the provincial constituency established in 1885. The following districts include areas that were formerly part of Thunder Bay District:

Subdivisions

Municipalities

First Nations and their Indian Reserves

Unorganized areas

Demographics

As a census division in the 2021 Census of Population conducted by Statistics Canada, the Thunder Bay District had a population of 146,862 living in 64,601 of its 72,510 total private dwellings, a change of NaN% from its 2016 population of 146,048. With a land area of 102895.48 km2, it had a population density of in 2021.