First-level division
🇨🇦 Ontario
Subdivisions
Peel
Population 1,296,814
York
Population 1,032,524
Toronto
Population 670,000
Regional Municipality of Durham
Population 608,124
Halton
Population 500,000
Algoma
Population 113,777
Chatham-Kent
Population 108,589
Kawartha Lakes
Population 74,561
Haldimand County
Population 45,212
Sudbury District
Population 22,368
Brant
Bruce County
Cochrane District
District Municipality of Muskoka
Dufferin County
Elgin County
Essex County
Frontenac County
Greater Sudbury
Grey County
Haliburton County
Hamilton
Hastings County
Huron County
Kenora District
Lambton County
Lanark County
Lennox and Addington County
Manitoulin District
Middlesex County
Nipissing District
Northumberland County
Ottawa
Oxford County
Parry Sound District
Perth County
Peterborough County
Prince Edward County
Rainy River District
Regional Municipality of Niagara
Renfrew County
Simcoe County
Thunder Bay District
Timiskaming District
United Counties of Leeds and Grenville
United Counties of Prescott and Russell
United Counties of Stormont, Dundas and Glengarry
Waterloo
Wellington County