12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 12010 | Amsterdam | 27,213 |
| 13339 | Fort Plain | 6,084 |
| 13317 | Canajoharie | 4,002 |
| 12072 | Fultonville | 2,992 |
| 12068 | Fonda | 2,509 |
| 12070 | Fort Johnson | 2,499 |
| 12066 | Esperance | 1,834 |
| 13428 | Palatine Bridge | 1,533 |
| 12166 | Sprakers | 1,505 |
| 13410 | Nelliston | 536 |
| 12069 | Fort Hunter | 483 |
| 12177 | Tribes Hill | 455 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Montgomery County, New York (US Census).