K
- (Renfrew County) Khartum
- (Middlesex County) Keyser
- (Grey County) Keward
- (Ottawa) Kenson Park
- (Algoma) Kentvale
- (Timiskaming District) Kerns
- (Timiskaming District) Kerr Lake
- (Renfrew County) Kerr Line
- (Middlesex County) Kerwood
- (York) Kettleby
- (Sudbury) Killarney
- (United Counties of Leeds and Grenville) Kemptville
- (Bruce County) Kincardine
- (York) King
- Kirkland Lake
- (Cochrane District) Kapuskasing
- (Kenora District) Kenora
- Kawartha Lakes
- (Ottawa) Kanata
- Kingston
- (Regional Municipality of Waterloo) Kitchener