How many zip codes are in Putnam County New York?

Putnam County, New York contains 9 zip codes.

What is the county seat of Putnam County?

The county seat of Putnam County, New York is Carmel.

What cities are in Putnam County?

Putnam County USPS city names in this directory include Mahopac, Carmel, Brewster, Putnam Valley, Patterson, Cold Spring, Garrison, Lake Peekskill and 1 more. The county seat is Carmel.

What is the population of Putnam County?

The population of Putnam County, New York is approximately 99,034.

What zip codes are in Putnam County?

Putnam County contains 9 zip codes: 9 standard delivery ZIPs. Browse the table on this page for the complete list.

Putnam County, New York Zip Codes

📍 Putnam County has 9 zip codes with a population of 99,034.

County

Putnam

County Seat

Carmel

Zip Codes

Population

99,034

Putnam County is located in New York with a land area of 225 square miles. The county seat is Carmel. Below you'll find all 9 zip codes in Putnam County with population, income and home value, the county's affordability profile, and links to its 9 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 Putnam County Zip Codes

ZIP Code	City	County	Population	Median Income	Median Home	Details
10509	Brewster	Putnam	20,055	$120,987	$430,200	View →
10512	Carmel	Putnam	24,238	$124,519	$401,800	View →
10516	Cold Spring	Putnam	5,607	$135,922	$625,400	View →
10524	Garrison	Putnam	4,298	$125,568	$549,600	View →
10537	Lake Peekskill	Putnam	2,418	$126,354	$367,500	View →
10541	Mahopac	Putnam	26,137	$133,929	$472,600	View →
10542	Mahopac Falls	Putnam	—	—	—	View →
10579	Putnam Valley	Putnam	8,825	$135,893	$515,000	View →
12563	Patterson	Putnam	7,456	$102,472	$358,200	View →

Putnam County at a Glance

Residents (ZIPs with data)

99,034

Median household income

$125,961

Median home value

$451,400

Price-to-income ratio

3.5

Median rent

$1,918

Owner-occupied

83%

Bachelor's degree+

45%

Poverty rate

6.5%

Putnam County has 9 ZIP codes in this directory: 9 standard delivery ZIPs. The 8 ZIPs with published Census housing data cover 99,034 residents, the largest being 10541 (Mahopac) with 26,137 people.

The median ZIP in Putnam County has a household income of $125,961 and a home value of $451,400, a price-to-income ratio of 3.5, above the 2.9 New York ZIP median. Affordability ranges from 10537 in Lake Peekskill at a ratio of 2.9 to 10516 in Cold Spring, where the median home is $625,400. The highest median income is in 10516 (Cold Spring) at $135,922. Median rent across these ZIPs is $1,918 a month.

83% of households in the typical Putnam County ZIP own their home (statewide ZIP median 80%). 45% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 6.5%, below the 9.9% statewide ZIP median. Overall density is about 441 residents per square mile across 225 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.