ZIP Code 52133

52133 is one of Iowa's ZIP codes, delivering to addresses in Castalia, Winneshiek County.

City: Castalia
County: Winneshiek County
State: Iowa
Prefix: 521xx

Where this code sits

52133 is part of the 521xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Castalia.

Castalia Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52133 delivers to without sharing its boundary.

563 Area code 563

ZIP codes nearest 52133

The ZIP codes whose reference points sit closest to 52133.
ZIP code	Distance	Delivers to
ZIP code 52161	5.5 mi	Ossian, IA
ZIP code 52135	8.5 mi	Clermont, IA
ZIP code 52162	11 mi	Postville, IA
ZIP code 52156	12 mi	Luana, IA
ZIP code 52144	13 mi	Fort Atkinson, IA
ZIP code 52141	13 mi	Elgin, IA
ZIP code 52172	13 mi	Waukon, IA
ZIP code 52132	13 mi	Calmar, 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 52133, plotted from its record coordinates.

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

Scope ZIP code 52133. 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.