ZIP Code 37166

37166 is one of Tennessee's ZIP codes, delivering to addresses in Smithville, DeKalb County.

City: Smithville
County: DeKalb County
State: Tennessee
Prefix: 371xx

Where this code sits

37166 is part of the 371xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smithville.

Smithville Tennessee ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 37166 delivers to without sharing its boundary.

ZIP codes nearest 37166

The ZIP codes whose reference points sit closest to 37166.
ZIP code	Distance	Delivers to
ZIP code 37059	6.4 mi	Dowelltown, TN
ZIP code 37095	11 mi	Liberty, TN
ZIP code 38587	11 mi	Walling, TN
ZIP code 38569	12 mi	Lancaster, TN
ZIP code 38582	12 mi	Silver Point, TN
ZIP code 38581	13 mi	Rock Island, TN
ZIP code 38567	14 mi	Hickman, TN
ZIP code 38550	15 mi	Campaign, 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 37166, plotted from its record coordinates.

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

Scope ZIP code 37166. 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.