ZIP Code 83431

83431 is one of Idaho's ZIP codes, delivering to addresses in Lewisville, Jefferson County.

City: Lewisville
County: Jefferson County
State: Idaho
Prefix: 834xx

Where this code sits

83431 is part of the 834xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lewisville.

Lewisville Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83431 delivers to without sharing its boundary.

ZIP codes nearest 83431

The ZIP codes whose reference points sit closest to 83431.
ZIP code	Distance	Delivers to
ZIP code 83434	4.1 mi	Menan, ID
ZIP code 83444	5.7 mi	Roberts, ID
ZIP code 83442	5.9 mi	Rigby, ID
ZIP code 83454	6.3 mi	Ucon, ID
ZIP code 83401	11 mi	Idaho Falls, ID
ZIP code 83427	11 mi	Iona, ID
ZIP code 83402	13 mi	Idaho Falls, ID
ZIP code 83404	14 mi	Idaho Falls, ID

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 83431, plotted from its record coordinates.

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

Scope ZIP code 83431. 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.