16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 13367 | Lowville | 8,786 |
| 13626 | Copenhagen | 2,322 |
| 13648 | Harrisville | 2,236 |
| 13620 | Castorland | 2,150 |
| 13327 | Croghan | 1,956 |
| 13433 | Port Leyden | 1,708 |
| 13343 | Glenfield | 1,543 |
| 13473 | Turin | 1,060 |
| 13368 | Lyons Falls | 1,025 |
| 13325 | Constableville | 882 |
| 13665 | Natural Bridge | 686 |
| 13489 | West Leyden | 508 |
| 13305 | Beaver Falls | 421 |
| 13312 | Brantingham | 288 |
| 13345 | Greig | 184 |
| 13404 | Martinsburg | 162 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Lewis County, New York (US Census).