ZIP Code 82643

82643 is one of Wyoming's ZIP codes, delivering to addresses in Midwest, Natrona County.

City: Midwest
County: Natrona County
State: Wyoming
Prefix: 826xx

Where this code sits

82643 is part of the 826xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Midwest.

Midwest Wyoming ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 82643 delivers to without sharing its boundary.

307 Area code 307

ZIP codes nearest 82643

The ZIP codes whose reference points sit closest to 82643.
ZIP code	Distance	Delivers to
ZIP code 82635	0.9 mi	Edgerton, WY
ZIP code 82640	12 mi	Linch, WY
ZIP code 82639	26 mi	Kaycee, WY
ZIP code 82636	36 mi	Evansville, WY
ZIP code 82602	36 mi	Casper, WY
ZIP code 82646	38 mi	Natrona, WY
ZIP code 82605	38 mi	Casper, WY
ZIP code 82601	39 mi	Casper, WY

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 82643, plotted from its record coordinates.

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

Scope ZIP code 82643. 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.