Peconic, New York Zip Codes
📍 Peconic is in Suffolk County, New York with 1 zip code; the most populous is 11958.
Peconic is a USPS city name in Suffolk County, New York with a Census population of approximately 864 across its ZIP codes. Suffolk County as a whole has 117 ZIP codes in this directory. Below you'll find every zip code serving Peconic with population, income and home value, a map, and the city's affordability profile.
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 Peconic Zip Codes
Peconic at a Glance
Peconic has 1 ZIP code in this directory: 1 standard delivery ZIP. Its one ZIP with published Census housing data, 11958, has 864 residents.
Peconic's ZIP has a household income of $64,263 and a home value of $830,600, a price-to-income ratio of 12.9, far above the 2.9 New York ZIP median.
71% of households in Peconic own their home (statewide ZIP median 80%). 40% of adults hold a bachelor's degree, above the 31% statewide median. Overall density is about 298 residents per square mile across 3 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.
Peconic Zip Code Map
Interactive map of Peconic, New York zip codes. Click any marker for details.