Nassau County, New York Zip Codes
📍 Nassau County has 110 zip codes with a population of 1,399,944.
Nassau County is located in New York with a land area of 283 square miles. The county seat is Mineola. Below you'll find all 110 zip codes in Nassau County with population, income and home value, the county's affordability profile, and links to its 63 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 Nassau County Zip Codes
Nassau County at a Glance
Nassau County has 110 ZIP codes in this directory: 110 standard delivery ZIPs. The 67 ZIPs with published Census housing data cover 1,399,944 residents, the largest being 11550 (Hempstead) with 60,658 people.
The median ZIP in Nassau County has a household income of $149,250 and a home value of $708,400, a price-to-income ratio of 4.9, far above the 2.9 New York ZIP median. Affordability ranges from 11575 in Roosevelt at a ratio of 3.4 to 11568 in Old Westbury, where the median home is above the $2 million Census ceiling. The highest median income is in 11568 (Old Westbury) at more than $250,000. Median rent across these ZIPs is $2,287 a month.
85% of households in the typical Nassau County ZIP own their home (statewide ZIP median 80%). 55% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 4.6%, far below the 9.9% statewide ZIP median. Overall density is about 4,952 residents per square mile across 283 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.
Nassau County Zip Code Map
Interactive map of Nassau County, New York zip codes.