K
- (Huron County) Kintail
- (Perth County) Kinkora
- (Bruce County) Kinhuron
- (Regional Municipality of Waterloo) Kingwood
- (Ottawa) Kingsview Park
- (Elgin County) Kingsmill
- (Hastings County) Kingsford
- (York) Kingscross Estates
- (Renfrew County) Kaszuby
- (Renfrew County) Kellys Corner
- (Hastings County) Keller Bridge
- (Peterborough County) Keene
- (Simcoe County) Keenansville
- (Frontenac County) Keelerville
- (Timiskaming District) Kearns
- (Peterborough County) Kawartha Park
- (Parry Sound District) Katrine
- (Dufferin County) Keldon
- (Peterborough County) Kasshabog Lake
- (Lennox and Addington County) Kaladar
- (Manitoulin District) Kagawong
- (Thunder Bay District) Kakabeka Falls
- (Kenora District) Keewaywin
- (Middlesex County) Komoka
- Kingsville
- Kearney
- (Ottawa) Kempark
- (Peterborough County) Kendry
- (Haliburton County) Kilcoo Camp
- (Perth County) Kennicott