Dorchester, IA ZIP code

The ZIP code for Dorchester, Iowa is 52140. It is in Allamakee County.

52140

Population in these ZIPs: 671
Avg. median income: $72,200population-weighted
Typical home value: $398,800population-weighted

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Dorchester, IA ZIP code list

Dorchester, IA ZIP codes
ZIP code	Population	Median income	Typical home value
52140	671	$72,188	$398,800

Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology

Cities near Dorchester

New Albin 9 mi
Waukon 12 mi
Decorah 13 mi
Lansing 15 mi
Waterville 19 mi
Postville 23 mi
Castalia 24 mi
Ossian 25 mi
Harpers Ferry 25 mi
Ridgeway 25 mi
Calmar 26 mi
Monona 27 mi

Frequently asked questions

What is the ZIP code for Dorchester, IA?

The ZIP code for Dorchester, IA is 52140.

What county is Dorchester, Iowa in?

Dorchester ZIP codes are in Allamakee County.