| Sr. No. | City |
|---|---|
| 151 | ORILLIA |
| 152 | ORLEANS |
| 153 | OSHAWA |
| 154 | OTTAWA |
| 155 | OTTERVILLE |
| 156 | OWEN SOUND |
| 157 | PAISLEY |
| 158 | PAKENHAM |
| 159 | PARRY SOUND |
| 160 | PEMBROKE |
| 161 | PERTH |
| 162 | PETAWAWA |
| 163 | PETERBOROUGH |
| 164 | PETROLIA |
| 165 | PICKERING |
| 166 | PLANTAGENET |
| 167 | PORT COLBORNE |
| 168 | PORT DOVER |
| 169 | PORT ELGIN |
| 170 | PORT HOPE |
| 171 | PORT PERRY |
| 172 | PORTLAND |
| 173 | PRESCOTT |
| 174 | RENFREW |
| 175 | RICHMOND HILL |