How many zip codes are in Herkimer County New York?

Herkimer County, New York contains 17 zip codes.

What is the county seat of Herkimer County?

The county seat of Herkimer County, New York is Herkimer.

What cities are in Herkimer County?

Herkimer County USPS city names in this directory include Ilion, Herkimer, Little Falls, Frankfort, Mohawk, West Winfield, Dolgeville, Newport and 9 more. The county seat is Herkimer.

What is the population of Herkimer County?

The population of Herkimer County, New York is approximately 56,667.

What zip codes are in Herkimer County?

Herkimer County contains 17 zip codes: 17 standard delivery ZIPs. Browse the table on this page for the complete list.

Herkimer County, New York Zip Codes

📍 Herkimer County has 17 zip codes with a population of 56,667.

County

Herkimer

County Seat

Herkimer

Zip Codes

Population

56,667

Herkimer County is located in New York with a land area of 1,031 square miles. The county seat is Herkimer. Below you'll find all 17 zip codes in Herkimer 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 Herkimer County Zip Codes

ZIP Code	City	County	Population	Median Income	Median Home	Details
13324	Cold Brook	Herkimer	1,714	$80,313	$144,800	View →
13329	Dolgeville	Herkimer	3,326	$57,014	$120,600	View →
13331	Eagle Bay	Herkimer	175	$64,500	$290,000	View →
13340	Frankfort	Herkimer	7,322	$69,928	$143,900	View →
13350	Herkimer	Herkimer	9,641	$62,548	$136,400	View →
13357	Ilion	Herkimer	10,073	$62,500	$105,200	View →
13361	Jordanville	Herkimer	666	$100,000	$178,400	View →
13365	Little Falls	Herkimer	8,545	$60,458	$121,000	View →
13406	Middleville	Herkimer	491	$98,000	$139,100	View →
13407	Mohawk	Herkimer	5,125	$72,700	$134,200	View →
13416	Newport	Herkimer	2,120	$83,125	$160,000	View →
13420	Old Forge	Herkimer	890	$107,770	$348,900	View →
13431	Poland	Herkimer	1,929	$83,200	$207,700	View →
13454	Salisbury Center	Herkimer	754	$100,156	—	View →
13472	Thendara	Herkimer	277	—	$369,100	View →
13475	Van Hornesville	Herkimer	49	$77,917	$145,800	View →
13491	West Winfield	Herkimer	3,570	$72,500	$144,300	View →

Herkimer County at a Glance

Residents (ZIPs with data)

56,667

Median household income

$72,700

Median home value

$144,300

Price-to-income ratio

2.0

Median rent

$800

Owner-occupied

81%

Bachelor's degree+

22%

Poverty rate

12.1%

Herkimer County has 17 ZIP codes in this directory: 17 standard delivery ZIPs. The 15 ZIPs with published Census housing data cover 56,667 residents, the largest being 13357 (Ilion) with 10,073 people.

The median ZIP in Herkimer County has a household income of $72,700 and a home value of $144,300, a price-to-income ratio of 2.0, below the 2.9 New York ZIP median. Affordability ranges from 13406 in Middleville at a ratio of 1.4 to 13420 in Old Forge, where the median home is $348,900. The highest median income is in 13420 (Old Forge) at $107,770. Median rent across these ZIPs is $800 a month.

81% of households in the typical Herkimer County ZIP own their home (statewide ZIP median 80%). 22% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 12.1%, above the 9.9% statewide ZIP median. Overall density is about 55 residents per square mile across 1,031 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.