With a geographic area of 3,627 square kilometers, the City of Greater Sudbury is the largest municipality in Ontario based on land mass. Home to 330 lakes, Greater Sudbury is locally known as the City of Lakes and contains more lakes than any other municipality in Canada.
- 330 lakes over 10 hectares in size are within city limits.
- 112 lakes over 100 hectares in size.
- 16.5% (or 601 square kilometers) of the City's total surface area is covered by water.
- 12.2% of the City consists of lakes rivers and creeks.
- 4.3% of the City consists of wetlands.
- Lake Wanapitei is the largest city-contained lake in the world at 13,257 hectares, which represents 1/3 of the total lake area.
- There are currently 28 lake stewardship groups in Greater Sudbury.
- In 2009, approximately 7,000 people or 4% of the population lived on a lake.
- City of Greater Sudbury is divided into two main watersheds: the French River Watershed (to the east) drains the Wanapitei River, French River and flows into Georgian Bay and the Spanish River Watershed (to the west) drains the Vermilion River, Spanish River and flows into Lake Huron.
- Within these two watersheds there are 25 sub-watershed units.