County ZIP codes · New York · FIPS 36043
Herkimer County, NY ZIP Codes
Herkimer County, New York has 28 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 17 of the residential ones lie mainly in Herkimer County and 11 mainly in a neighboring county; 16 cross the county line. Median household income ranges from $56,047 in 13339 (Fort Plain) to $109,351 in 13420 (Old Forge) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Herkimer County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $65,761 and $86,176.
They carry 28 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 28 residential ZIP codes in Herkimer County
17 ZIP codes lie mainly in Herkimer County; 11 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 13357 | Ilion | 10,167 | 344 | $64k | $116k | 100% |
| 13350 | Herkimer | 9,522 | 301 | $56k | $137k | 100% |
| 13365 | Little Falls | 8,578 | 69 | $66k | $131k | 100% |
| 13340 | Frankfort | 7,404 | 123 | $70k | $158k | 100% |
| 13407 | Mohawk | 5,042 | 89 | $70k | $149k | 100% |
| 13416 | Newport | 2,369 | 47 | $85k | $186k | 100% |
| 13431 | Poland | 1,847 | 51 | $76k | $245k | 88% |
| 13324 | Cold Brook | 1,729 | 13 | $86k | $179k | 100% |
| 13338 | Forestport | 1,280 | 6 | $58k | $176k | 77% |
| 13322 | Clayville | 1,172 | 88 | $91k | $205k | 60% |
| 13420 | Old Forge | 1,055 | 7 | $109k | $355k | 100% |
| 13454 | Salisbury Center | 735 | 57 | $123k | – | 100% |
| 13361 | Jordanville | 725 | 25 | $92k | $179k | 77% |
| 13406 | Middleville | 486 | 105 | $103k | $153k | 100% |
| 13472 | Thendara | 259 | 19 | – | $436k | 100% |
| 13331 | Eagle Bay | 204 | 1 | $61k | $283k | 99% |
| 13475 | Van Hornesville | 44 | 20 | $54k | – | 100% |
Partly in Herkimer County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 13439 | Richfield Springs | 3,681 | 42 | $66k | $186k | 40% |
| 13491 | West Winfield | 3,431 | 46 | $73k | $151k | 38% |
| 13367 | Lowville | 8,601 | 19 | $68k | $171k | 36% |
| 13470 | Stratford | 877 | 10 | $75k | $160k | 30% |
| 13502 | Utica | 34,037 | 662 | $58k | $158k | 30% |
| 13329 | Dolgeville | 3,256 | 59 | $60k | $122k | 29% |
| 13438 | Remsen | 3,065 | 32 | $70k | $193k | 25% |
| 13339 | Fort Plain | 6,010 | 57 | $56k | $94k | 19% |
| 13456 | Sauquoit | 3,848 | 151 | $94k | $260k | 14% |
| 13413 | New Hartford | 16,742 | 868 | $95k | $240k | 11% |
| 13304 | Barneveld | 1,653 | 94 | $109k | $300k | 10% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
16 ZIP codes of Herkimer County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Herkimer | Elsewhere |
|---|---|---|
| 13502 | 30% | Oneida County 70% |
| 13413 | 11% | Oneida County 89% |
| 13367 | 36% | Lewis County 64% |
| 13339 | 19% | Montgomery County 75%; Fulton County 6% |
| 13456 | 14% | Oneida County 86% |
| 13439 | 40% | Otsego County 60% |
| 13491 | 38% | Otsego County 52%; Madison County 10% |
| 13329 | 29% | Fulton County 71% |
| 13438 | 25% | Oneida County 75% |
| 13431 | 88% | Oneida County 12% |
| 13304 | 10% | Oneida County 90% |
| 13338 | 77% | Oneida County 23% |
| 13322 | 60% | Oneida County 40% |
| 13470 | 30% | Fulton County 70% |
| 13361 | 77% | Otsego County 23% |
| 13331 | 99% | Hamilton County 1% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Herkimer County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Herkimer County's ZIP codes use 3 prefixes: 133, 134 and 135.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 133 | Syracuse, NY (SCF 130) | 13 | 55 |
| 134 | Syracuse, NY (SCF 130) | 14 | 68 |
| 135 | Syracuse, NY (SCF 130) | 1 | 6 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.