22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 13126 | Oswego | 36,278 |
| 13069 | Fulton | 23,378 |
| 13036 | Central Square | 9,020 |
| 13114 | Mexico | 7,397 |
| 13135 | Phoenix | 6,296 |
| 13142 | Pulaski | 6,044 |
| 13074 | Hannibal | 4,453 |
| 13132 | Pennellville | 3,495 |
| 13131 | Parish | 3,115 |
| 13044 | Constantia | 3,026 |
| 13167 | West Monroe | 2,982 |
| 13076 | Hastings | 2,416 |
| 13493 | Williamstown | 2,205 |
| 13083 | Lacona | 1,989 |
| 13145 | Sandy Creek | 1,595 |
| 13302 | Altmar | 1,377 |
| 13144 | Richland | 1,323 |
| 13028 | Bernhards Bay | 809 |
| 13437 | Redfield | 307 |
| 13103 | Mallory | 226 |
| 13115 | Minetto | 225 |
| 13121 | New Haven | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 22 ZCTAs in Oswego County, New York (US Census).