ZIP Code 12138

12138 is one of New York's ZIP codes, delivering to addresses in Petersburg, Rensselaer County.

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

Where this code sits

12138 is part of the 121xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Petersburg.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 12138 delivers to without sharing its boundary.

ZIP codes nearest 12138

The ZIP codes whose reference points sit closest to 12138.
ZIP code	Distance	Delivers to
ZIP code 12022	4.3 mi	Berlin, NY
ZIP code 12082	5.6 mi	Grafton, NY
ZIP code 05260	6.1 mi	North Pownal, VT
ZIP code 12052	6.8 mi	Cropseyville, NY
ZIP code 05261	6.8 mi	Pownal, VT
ZIP code 12040	7.3 mi	Cherry Plain, NY
ZIP code 01267	7.5 mi	Williamstown, MA
ZIP code 12089	8.2 mi	Hoosick, 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 12138, plotted from its record coordinates.

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

Scope ZIP code 12138. 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.