Greater Sudbury (2001 census population 155,219) is a city in Northern Ontario, Canada. Greater Sudbury was created in 2001 by amalgamating the cities and towns of the Regional Municipality of Sudbury, along with several previously unincorporated geographic townships.

It is the largest city in Northern Ontario in population, and the 20th largest metropolitan area in Canada. In land area, it is now the largest city in Ontario, the seventh largest municipality in Canada, and the largest municipality in English Canada legally designated as a city.