Suffolk County, New York Zip Codes
📍 Suffolk County has 117 zip codes with a population of 1,437,258.
Suffolk County is located in New York with a land area of 898 square miles. The county seat is Riverhead. Below you'll find all 117 zip codes in Suffolk County with population, income and home value, the county's affordability profile, and links to its 107 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 Suffolk County Zip Codes
Suffolk County at a Glance
Suffolk County has 117 ZIP codes in this directory: 115 standard delivery ZIPs and 2 PO Box or unique ZIPs that carry no resident population in Census data. The 95 ZIPs with published Census housing data cover 1,437,258 residents, the largest being 11706 (Bay Shore) with 68,648 people.
The median ZIP in Suffolk County has a household income of $128,844 and a home value of $598,600, a price-to-income ratio of 4.2, above the 2.9 New York ZIP median. Affordability ranges from 11789 in Sound Beach at a ratio of 2.7 to 11976 in Water Mill, where the median home is above the $2 million Census ceiling. The highest median income is in 11724 (Cold Spring Harbor) at more than $250,000. Median rent across these ZIPs is $2,238 a month.
85% of households in the typical Suffolk County ZIP own their home (statewide ZIP median 80%). 47% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 5.2%, below the 9.9% statewide ZIP median. Overall density is about 1,601 residents per square mile across 898 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.
Suffolk County Zip Code Map
Interactive map of Suffolk County, New York zip codes.