Greater Sudbury, also known as Sudbury, is a city located in Northern Ontario, Canada. It serves as the most populous city in the region, with a population of approximately 166,004 as of 2021.
The city is distinguished by its unique administrative status as the only single-tier municipality in Northern Ontario. Geographically, it is the largest city in Ontario by area and ranks as the fifth largest city in Canada. While Greater Sudbury is a separate entity from the Sudbury District, it is entirely surrounded by that district.