P
- (Huron County) Prosperity
- (Regional Municipality of Waterloo) Punkeydoodles Corners
- (Hastings County) Purdy
- (Northumberland County) Purdy Corners
- (Bruce County) Purple Grove
- (Durham) Purple Hill
- (Haliburton County) Pusey
- (Wellington County) Puslinch
- (Middlesex County) Putnam
- (Essex County) Pelee
- (Durham) Port Perry
- (Bruce County) Pike Bay
- (Huron County) Port Albert
- (Manitoulin District) Providence Bay
- (Lambton County) Port Lambton
- (District Municipality of Muskoka) Port Carling
- (Bruce County) Paisley
- Powassan
- (Oxford County) Plattsville
- (Middlesex County) Parkhill
- (Elgin County) Port Stanley
- Prescott
- (Prince Edward County) Picton
- (Lambton County) Petrolia
- Perth
- (Parry Sound District) Parry Sound
- Port Hope
- Pembroke
- Port Colborne
- Prince Edward