ZIP Code 12123

12123 is one of New York's ZIP codes, delivering to addresses in Nassau, Rensselaer County.

City: Nassau
County: Rensselaer County
State: New York
Prefix: 121xx

Where this code sits

12123 is part of the 121xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Nassau.

Nassau New York ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 12123 delivers to without sharing its boundary.

ZIP codes nearest 12123

The ZIP codes whose reference points sit closest to 12123.
ZIP code	Distance	Delivers to
ZIP code 12063	2.7 mi	East Schodack, NY
ZIP code 12132	4.0 mi	North Chatham, NY
ZIP code 12115	4.1 mi	Malden Bridge, NY
ZIP code 12033	4.9 mi	Castleton On Hudson, NY
ZIP code 12024	5.6 mi	Brainard, NY
ZIP code 12062	5.8 mi	East Nassau, NY
ZIP code 12061	5.9 mi	East Greenbush, NY
ZIP code 12130	6.6 mi	Niverville, NY

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 12123, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 12123. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.