| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 13040 | Cincinnatus | Cortland County | Standard |
| 13045 | Cortland | Cortland County | Standard |
| 13052 | De Ruyter | Madison County | Standard |
| 13053 | Dryden | Tompkins County | Standard |
| 13056 | East Homer | Cortland County | PO Box |
| 13077 | Homer | Cortland County | Standard |
| 13087 | Little York | Cortland County | PO Box |
| 13101 | McGraw | Cortland County | Standard |
| 13141 | Preble | Cortland County | Standard |
| 13158 | Truxton | Cortland County | Standard |
| 13159 | Tully | Onondaga County | Standard |
| 13738 | Blodgett Mills | Cortland County | PO Box |
| 13784 | Harford | Cortland County | PO Box |
| 13803 | Marathon | Cortland County | Standard |
| 13835 | Richford | Tioga County | Standard |
| 13863 | Willet | Cortland County | Standard |