Along with the Nipissing District, the Algoma District is one of the oldest districts of Ontario, created in 1858. The district seat is Sault Ste. Marie, home to a number of the district's attractions, including Sault College, Sault Ste. Marie Airport, and Sault Ste. Marie Canal.
Made of parts of the Temiskaming and the Thunder Bay districts, the Cochrane District was created in 1921. The district seat is Cochrane, and it encompasses many Cree Nation Reserves, including Fort Albany and the Wahgoshig First Nation Reserve.
Created in 1907 from sections of the Rainy River District, the Kenora District is the largest district in Ontario. The district seat is Kenora. One of the most densely populated districts, the Kenora District is primarily covered in permafrost and Arctic tundra because of the cold waters from the Hudson and James bays.
Created in 1888 from a section of the Algoma District, the Manitoulin District is the smallest district of Ontario. It consists of a number of small islands, including Manitoulin Island. The district seat is Gore Bay. The district is also home to a number of First Nation reserves, including the M'Chigeeng and Wikwemikong. The Sudbury District, while a separate district created from parts of the Algoma and Nipissing districts in 1894, shares may of its social services with the Manitoulin District.
The newest district of Ontario, the Muskoka District, was created in 1971 and is known as a vacation spot because of its lakes, which include Gull Lake and Mounts Bay. The district seat is Bracebridge. The district is also home to a number of resorts, farming communities and villages populated with cottages, earning the area the nickname "cottage country."
The most densely populated district in northern Ontario, the Nipissing District, is also one of the oldest districts, founded in 1858. The district seat is North Bay, which lies on the shore of Lake Nipissing, and is the only city in the district.
Parry Sound District was created in 1870. The district seat is Parry Sound, which is thought to be the world's deepest, natural freshwater port. The Parry Sound District is unique among Ontario's districts as it has no incorporated county, regional or district municipalities.
The Rainy River District was created in 1885 and is known for being the only part of Ontario in the Central Time Zone. The district seat is Fort Frances, a fishing town that is visited by a large population of fishermen every year for the Fort Frances Canadian Bass Championship.
Created from part of the Algoma District in 1871, the Thunder Bay District, like the Sudbury District, is mostly unincorporated. The district seat is Thunder Bay, where more than half of the district's population resides. The Thunder Bay District is made of a number of First Nation reserves, including the Aroland and Pays Plat First Nation reserves.
The Temiskaming District was created from parts of the Algoma, Sudbury and Nipissing districts in 1912. The district seat is Haileybury. The Temiskaming District is known for the Heritage Silver Trail, an outdoor museum in the town of Cobalt that recounts the area's silver-mining operations in the early 1900s.
