ZIP Code 37657

37657 is one of Tennessee's ZIP codes, delivering to addresses in Flag Pond, Unicoi County.

City: Flag Pond
County: Unicoi County
State: Tennessee
Prefix: 376xx

Where this code sits

37657 is part of the 376xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Flag Pond.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 37657 delivers to without sharing its boundary.

ZIP codes nearest 37657

The ZIP codes whose reference points sit closest to 37657.
ZIP code	Distance	Delivers to
ZIP code 37614	10 mi	Johnson City, TN
ZIP code 28754	11 mi	Mars Hill, NC
ZIP code 37650	12 mi	Erwin, TN
ZIP code 28753	13 mi	Marshall, NC
ZIP code 37690	16 mi	Telford, TN
ZIP code 28740	17 mi	Green Mountain, NC
ZIP code 28714	17 mi	Burnsville, NC
ZIP code 28709	17 mi	Barnardsville, NC

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 37657, plotted from its record coordinates.

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

Scope ZIP code 37657. 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.