P
- (Regional Municipality of Niagara) Pelham
- (Comtés unis de Prescott et Russell) Pendleton
- (Peterborough County) Pengelly Landing
- (Simcoe County) Penville
- (Manitoulin District) Perivale
- (Dufferin County) Perm
- (Renfrew County) Perrault
- (Renfrew County) Perretton
- (United Counties of Leeds and Grenville) Perrins Corners
- (Regional Municipality of Niagara) Perry
- (Oxford County) Perry's Corners
- (Simcoe County) Petaguishene Beach
- (Haliburton County) Peterson Corner
- (Wellington County) Petherton
- (Lanark County) Petrie Shore
- (Frontenac County) Petworth
- (Parry Sound District) Pevensey
- (Thunder Bay District) Phillip Island
- (Parry Sound District) Pickerel Lake
- (Kenora District) Pickle Crow
- (Kenora District) Pickle Lake
- (Ottawa) Pierces Corners
- (Durham) Pinedale
- (Ottawa) Pineglen
- (Ottawa) Pineglen Annex
- (Lanark County) Pine Grove
- (Durham) Pine Point
- (Bruce County) Pine River
- (Renfrew County) Pine Valley
- (Ottawa) Pineview