ZIP Code 52140

52140 is one of Iowa's ZIP codes, delivering to addresses in Dorchester, Allamakee County.

City: Dorchester
County: Allamakee County
State: Iowa
Prefix: 521xx

Where this code sits

52140 is part of the 521xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dorchester.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52140 delivers to without sharing its boundary.

563 Area code 563

ZIP codes nearest 52140

The ZIP codes whose reference points sit closest to 52140.
ZIP code	Distance	Delivers to
ZIP code 55931	5.1 mi	Eitzen, MN
ZIP code 52149	9.3 mi	Highlandville, IA
ZIP code 55974	11 mi	Spring Grove, MN
ZIP code 52160	11 mi	New Albin, IA
ZIP code 52172	12 mi	Waukon, IA
ZIP code 55921	13 mi	Caledonia, MN
ZIP code 52151	13 mi	Lansing, IA
ZIP code 55954	15 mi	Mabel, MN

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 52140, plotted from its record coordinates.

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

Scope ZIP code 52140. 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.