ZIP Code 52631

52631 is one of Iowa's ZIP codes, delivering to addresses in Houghton, Lee County.

City: Houghton
County: Lee County
State: Iowa
Prefix: 526xx

Where this code sits

52631 is part of the 526xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Houghton.

Houghton Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52631 delivers to without sharing its boundary.

319 Area code 319

ZIP codes nearest 52631

The ZIP codes whose reference points sit closest to 52631.
ZIP code	Distance	Delivers to
ZIP code 52648	4.1 mi	Pilot Grove, IA
ZIP code 52657	5.1 mi	Saint Paul, IA
ZIP code 52649	6.1 mi	Salem, IA
ZIP code 52630	6.9 mi	Hillsboro, IA
ZIP code 52625	7.8 mi	Donnellson, IA
ZIP code 52656	9.9 mi	West Point, IA
ZIP code 52620	10 mi	Bonaparte, IA
ZIP code 52626	11 mi	Farmington, IA

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 52631, plotted from its record coordinates.

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

Scope ZIP code 52631. 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.