ZIP Code 12778

12778 is one of New York's ZIP codes, delivering to addresses in Smallwood, Sullivan County.

City: Smallwood
County: Sullivan County
State: New York
Prefix: 127xx

Where this code sits

12778 is part of the 127xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smallwood.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 12778 delivers to without sharing its boundary.

ZIP codes nearest 12778

The ZIP codes whose reference points sit closest to 12778.
ZIP code	Distance	Delivers to
ZIP code 12762	1.6 mi	Mongaup Valley, NY
ZIP code 12749	2.0 mi	Kauneonga Lake, NY
ZIP code 12786	2.6 mi	White Lake, NY
ZIP code 12720	4.0 mi	Bethel, NY
ZIP code 12783	4.7 mi	Swan Lake, NY
ZIP code 12742	6.0 mi	Harris, NY
ZIP code 12701	6.1 mi	Monticello, NY
ZIP code 12734	6.6 mi	Ferndale, 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 12778, plotted from its record coordinates.

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

Scope ZIP code 12778. 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.