Timmins, with a population of 42,997 (2006), is a city in northeastern Ontario, Canada on the Mattagami River. At 2,961.52 square kilometres (1,143 sq mi), Timmins was Canada's largest municipality in land area until 1995, when the regional municipality of Wood Buffalo, Alberta was created, although it remained the largest municipality in Ontario until 2001, when it was superseded by the newly amalgamated cities of Kawartha Lakes and Greater Sudbury.