ZIP Code 37656

37656 is one of Tennessee's ZIP codes, delivering to addresses in Fall Branch, Washington County.

City: Fall Branch
County: Washington County
State: Tennessee
Prefix: 376xx

Where this code sits

37656 is part of the 376xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fall Branch.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 37656 delivers to without sharing its boundary.

ZIP codes nearest 37656

The ZIP codes whose reference points sit closest to 37656.
ZIP code	Distance	Delivers to
ZIP code 37663	8.8 mi	Kingsport, TN
ZIP code 37664	9.4 mi	Kingsport, TN
ZIP code 37615	9.7 mi	Johnson City, TN
ZIP code 37660	9.8 mi	Kingsport, TN
ZIP code 37662	9.8 mi	Kingsport, TN
ZIP code 37669	9.8 mi	Kingsport, TN
ZIP code 37642	10 mi	Church Hill, TN
ZIP code 37645	10 mi	Mount Carmel, TN

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 37656, plotted from its record coordinates.

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

Scope ZIP code 37656. 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.