Cities and Communities in Southern Ontario
(check also Northern Ontario)
| Pain Court | Peterborough | Point Edward | Port Rowan |
| Paisley | Peters Corners | Pointe- au-Baril Station | Port Royal |
| Pakenham | Petersburg | Poland | Port Ryerse |
| Palermo | Pethericks Corners | Pontypool | Port Sandfield |
| Palgrave | Petherton | Poole | Port Severn |
| Palmer Rapids | Petrolia | Poplar | Port Stanley |
| Palmerston | Pevensey | Poplar Hill | Port Stanton |
| Palmyra | Phelpston | Port Albert | Port Sydney |
| Paquette Corners | Philipsville | Port Alma | Portland |
| Paradise Point | Phillipsburg | Port Anson | Pottageville |
| Parham | Pickerel | Port Bolster | Potters Landing |
| Paris | Pickerel Lake | Port Bruce | Powassan |
| Park Head | Pickerel River | Port Burwell | Prairie Siding |
| Parker | Pickering | Port Carling | Precious Corners |
| Parkhill | Pickering Village | Port Carmen | Prescott |
| Parkinson | Picton | Port Colborne | Presqu'ile Point |
| Parry Island | Pike Bay | Port Credit | Preston Lake |
| Parry Sound | Pine Grove | Port Cunnington | Prices Corner |
| Patton | Pine River | Port Dalhousie | Priceville |
| Paudash | Pinkerton | Port Darlington | Primrose |
| Peacock Point | Pitts Ferry | Port Dover | Prince Albert |
| Pelee Island | Pittston | Port Elgin | Prince Edward County |
| Pefferlaw | Plainfield | Port Elmsley | Princeton |
| Pelham | Plantagenet | Port Franks | Pronto East |
| Pembroke | Plattsville | Port Glasgow | Proton Station |
| Pendleton | Pleasant Corners | Port Hope | Providence Bay |
| Penetanguishene | Pleasant Point | Port Lambton | Puce |
| Perivale | Pleasantville | Port Loring | Purdy |
| Perkinsfield | Plevna | Port Maitland | Purple Valley |
| Perth | Point Alexander | Port McNicoll | Puslinch |
| Perth Road | Point Anne | Port Perry | Putnam |
| Petawawa | Point Clark | Port Robinson |