16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 13367 | Lowville | 8,682 |
| 13626 | Copenhagen | 2,282 |
| 13327 | Croghan | 2,230 |
| 13620 | Castorland | 2,066 |
| 13648 | Harrisville | 2,007 |
| 13433 | Port Leyden | 1,647 |
| 13343 | Glenfield | 1,625 |
| 13473 | Turin | 1,128 |
| 13368 | Lyons Falls | 1,121 |
| 13325 | Constableville | 929 |
| 13665 | Natural Bridge | 812 |
| 13489 | West Leyden | 533 |
| 13312 | Brantingham | 308 |
| 13305 | Beaver Falls | 201 |
| 13345 | Greig | 175 |
| 13404 | Martinsburg | 127 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Lewis County, New York (US Census).