| ZIP Codes: | 17 ZIP Codes (16 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 315 / 680 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:15 PM |
| Population: | 56,853 [See All] |
| FIPS: | 36043 |
| CBSA: | Utica-Rome, NY |
| Land Area: | 1,187 sq mi |
| Water Area: | 27 sq mi |
| Coordinates: | 43.1899, -74.9604 |
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56,853 residents live across 17 ZIPs covering 1,187 sq mi, served by 17 distinct USPS-recognized cities.
Population moved from 61,895 to 56,853 from 2014 to 2024 — a -8.1% change. 3 ZIPs gained residents, 14 lost.
The county's wealthiest ZIP 13454 (Salisbury Center, $122,669 median) and poorest ZIP 13350 (Herkimer, $56,157) are 14.1 miles apart — a 2.2× income gap across local geography.
Median home values vary 3.1× across this county — from $115,600 in 13357 (Ilion) to $355,200 in 13420 (Old Forge).
Density varies 61× across the county — from 5 people/sq mi in 13324 (Cold Brook) to 335 in 13357 (Ilion).
Educational attainment ranges from 11.6% bachelor's+ in 13454 (Salisbury Center) to 58.7% in 13420 (Old Forge) — the breadth of educational profiles across the area.
Within New York, this is the #45 most populous of 62 counties and ranks #34 for median household income .
Weighted by population, the typical household earns about $68,805 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.7% of adults age 25+ hold a bachelor's degree or higher (8,801 of 40,506 reporting).
16 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
Herkimer County lost 8.1% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 13357 | Ilion | Standard | 10,167 | $63,678 | 30.4 | -9.9% |
| 13350 | Herkimer | Standard | 9,522 | $56,157 | 32.8 | -5.5% |
| 13365 | Little Falls | Standard | 8,578 | $66,307 | 109.5 | -6.1% |
| 13340 | Frankfort | Standard | 7,404 | $69,821 | 60.8 | -4.9% |
| 13407 | Mohawk | Standard | 5,042 | $69,846 | 58.8 | -4.5% |
| 13491 | West Winfield | Standard | 3,431 | $72,917 | 75.8 | -8.3% |
| 13329 | Dolgeville | Standard | 3,256 | $60,104 | 55.1 | -15.1% |
| 13416 | Newport | Standard | 2,369 | $85,128 | 51.7 | -0.7% |
| 13431 | Poland | Standard | 1,847 | $76,000 | 38.1 | -7.4% |
| 13324 | Cold Brook | Standard | 1,729 | $86,176 | 317.6 | -25.8% |
| 13420 | Old Forge | Standard | 1,055 | $109,351 | 141.9 | -17.4% |
| 13454 | Salisbury Center | Standard | 735 | $122,669 | 12.8 | 6.8% |
| 13361 | Jordanville | Standard | 725 | $92,000 | 25.1 | -24.1% |
| 13406 | Middleville | Standard | 486 | $102,692 | 7.9 | -27.9% |
| 13472 | Thendara | PO Box | 259 | — | 24.0 | -0.4% |
| 13331 | Eagle Bay | Standard | 204 | $61,250 | 144.8 | 37.8% |
| 13475 | Van Hornesville | Standard | 44 | $53,750 | 0.1 | 7.3% |