Lewis County, New York Zip Codes
📍 Lewis County has 17 zip codes with a population of 25,231.
Lewis County is located in New York with a land area of 1,294 square miles. The county seat is Lowville. Below you'll find all 17 zip codes in Lewis County with population, income and home value, the county's affordability profile, and links to its 17 city pages.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Lewis County Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 13305 | Beaver Falls | View → |
| 13312 | Brantingham | View → |
| 13325 | Constableville | View → |
| 13327 | Croghan | View → |
| 13343 | Glenfield | View → |
| 13345 | Greig | View → |
| 13367 | Lowville | View → |
| 13368 | Lyons Falls | View → |
| 13404 | Martinsburg | View → |
| 13433 | Port Leyden | View → |
| 13473 | Turin | View → |
| 13489 | West Leyden | View → |
| 13620 | Castorland | View → |
| 13626 | Copenhagen | View → |
| 13627 | Deer River | View → |
| 13631 | Denmark | View → |
| 13648 | Harrisville | View → |
Lewis County at a Glance
Lewis County has 17 ZIP codes in this directory: 17 standard delivery ZIPs. The 13 ZIPs with published Census housing data cover 25,231 residents, the largest being 13367 (Lowville) with 8,786 people.
The median ZIP in Lewis County has a household income of $66,458 and a home value of $158,700, a price-to-income ratio of 2.3, below the 2.9 New York ZIP median. Affordability ranges from 13473 in Turin at a ratio of 1.5 to 13312 in Brantingham, where the median home is $231,000. The highest median income is in 13473 (Turin) at $100,477. Median rent across these ZIPs is $799 a month.
84% of households in the typical Lewis County ZIP own their home (statewide ZIP median 80%). 18% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 11.0%, above the 9.9% statewide ZIP median. Overall density is about 19 residents per square mile across 1,294 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 New York ZIP Code Affordability Report.
Lewis County Zip Code Map
Interactive map of Lewis County, New York zip codes.