Counties, Districts and Regions in Ontario

• Central
• Eastern
• Georgian Bay
• Niagara
• Northeastern
• Northwestern
• Southwestern

• Algoma
• Brant
• Bruce
• Cochrane
• Dufferin
• Durham, Regional Municipality of
• Elgin
• Essex
• Frontenac
• Grey
• Haliburton
• Halton, Regional Municipality of
• Hastings
• Huron

• Kenora
• Lambton
• Lanark
• Leeds and Grenville
• Lennox and Addington
• Manitoulin
• Middlesex
• Muskoka
• Nipissing
• Norfolk
• Northumberland
• Oxford
• Parry Sound
• Peel, Regional Municipality of

• Perth
• Peterborough
• Prescott and Russell
• Rainy River
• Renfrew
• Simcoe
• Stormont, Dundas and Glengarry
• Sudbury
• Temiskaming
• Thunder Bay
• Waterloo, Regional Municipality of
• Wellington
• York, Regional Municipality of

• Regional: North America: Canada: Ontario: Cities 

• Association of Municipalities of Ontario  - Gives a list of the regions, counties and districts located in Ontario. Also provides a list of links pertaining to Ontario municipality sites.