City ZIP codes · New York

Lyon Mountain, NY ZIP Codes

2 ZIP codes use the postal name Lyon Mountain, New York (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Lyon Mountain's most populous ZIP code is 12955, with 503 people (ACS 2020-2024); 0% of its land is in the city of Lyon Mountain.

ACS2020-24
Census2020
GeoNames2026

Where are Lyon Mountain's ZIP codes?

The 2 residential ZIP codes named Lyon Mountain, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 2 residential ZIP codes of Lyon Mountain

Residential ZIP codes with the postal name Lyon Mountain, NY, largest first (ACS 2020-2024); sort by any column
	County
12955	Clinton County	503	21	$79k	$164k
12952	Clinton County	286	10	$53k	–

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Lyon Mountain's ZIP codes reach?

Lyon Mountain's residential ZIP codes lie in Clinton County.

Which first three digits do Lyon Mountain's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Lyon Mountain starts with 129.

Three-digit prefixes of Lyon Mountain's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Lyon Mountain's
Prefix	Sectional center	Here	All codes
129	Albany, NY (SCF 120)	2	74

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.