Nassau, New York Zip Codes
📍 Nassau is in Rensselaer County, New York with 1 zip code; the most populous is 12123.
Nassau is a USPS city name in Rensselaer County, New York with a Census population of approximately 4,853 across its ZIP codes. Rensselaer County as a whole has 32 ZIP codes in this directory. Below you'll find every zip code serving Nassau 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 Nassau Zip Codes
Nassau at a Glance
Nassau has 1 ZIP code in this directory: 1 standard delivery ZIP. Its one ZIP with published Census housing data, 12123, has 4,853 residents.
Nassau's ZIP has a household income of $104,438 and a home value of $275,000, a price-to-income ratio of 2.6, below the 2.9 New York ZIP median. Median rent across these ZIPs is $959 a month.
83% of households in Nassau own their home (statewide ZIP median 80%). 39% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 7.2%, below the 9.9% statewide ZIP median. Overall density is about 153 residents per square mile across 32 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 Zip Code Map
Interactive map of Nassau, New York zip codes. Click any marker for details.