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St. Catharines Postcodes — Ontario (ON)
| Location | City/District | States or Territories | States or Territories Abbrieviation | Postcode |
|---|---|---|---|---|
| St. Catharines Northeast | St. Catharines | Ontario | ON | L2M |
| St. Catharines Northwest | St. Catharines | Ontario | ON | L2N |
| St. Catharines East | St. Catharines | Ontario | ON | L2P |
| St. Catharines Central | St. Catharines | Ontario | ON | L2R |
| St. Catharines Southwest | St. Catharines | Ontario | ON | L2S |
| St. Catharines South | St. Catharines | Ontario | ON | L2T |
| St. Catharines Southeast | St. Catharines | Ontario | ON | L2V |
| St. Catharines West | St. Catharines | Ontario | ON | L2W |
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