Zip Code 12123 — Nassau, NY

ZIP Code 12123 is associated with Nassau, NY, in Rensselaer County. The listed population estimate is 4,457; estimated density is 54.2 people per square mile. Among records with population estimates, it ranks #9 of 26 in Rensselaer County and #765 of 1,778 in NY.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (42.522390, -73.606360)

Data MetricLocal Statistic
Postal / Zip Code12123
Primary CityNassau
State / ProvinceNY
CountyRensselaer
Total Population4,457
Population Density54.2 people/sq mi
TimezoneAmerica/New_York

How 12123 Compares

MetricZIP 12123Rensselaer County recordsNY records
Population estimate4,457158,934 (sum)19,771,902 (sum)
Population Density54.2 /sq mi----
County population rank#9 of 26----
State population rank#765 of 1,778----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in NY

ZIP CodeCityDistancePopulation estimate
ZIP 12063East Schodack3.3 mi665
ZIP 12132North Chatham3.8 mi111
ZIP 12115Malden Bridge3.9 mi60
ZIP 12024Brainard4.6 mi78
ZIP 12033Castleton On Hudson5.1 mi7,932

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →