22 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 13126 | Oswego | 36,495 |
| 13069 | Fulton | 22,810 |
| 13036 | Central Square | 8,616 |
| 13114 | Mexico | 7,214 |
| 13135 | Phoenix | 6,515 |
| 13142 | Pulaski | 6,365 |
| 13074 | Hannibal | 4,496 |
| 13132 | Pennellville | 3,626 |
| 13167 | West Monroe | 3,215 |
| 13131 | Parish | 2,880 |
| 13076 | Hastings | 2,778 |
| 13044 | Constantia | 2,643 |
| 13493 | Williamstown | 2,428 |
| 13145 | Sandy Creek | 2,028 |
| 13083 | Lacona | 1,835 |
| 13302 | Altmar | 1,289 |
| 13144 | Richland | 1,219 |
| 13028 | Bernhards Bay | 1,162 |
| 13437 | Redfield | 254 |
| 13103 | Mallory | 224 |
| 13115 | Minetto | 127 |
| 13121 | New Haven | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 22 ZCTAs in Oswego County, New York (US Census).