ZIP Code 52166

52166 is one of Iowa's ZIP codes, delivering to addresses in Saint Lucas, Fayette County.

City: Saint Lucas
County: Fayette County
State: Iowa
Prefix: 521xx

Where this code sits

52166 is part of the 521xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint Lucas.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52166 delivers to without sharing its boundary.

563 Area code 563

ZIP codes nearest 52166

The ZIP codes whose reference points sit closest to 52166.
ZIP code	Distance	Delivers to
ZIP code 52144	4.8 mi	Fort Atkinson, IA
ZIP code 52171	5.1 mi	Waucoma, IA
ZIP code 52147	8.2 mi	Hawkeye, IA
ZIP code 52132	9.1 mi	Calmar, IA
ZIP code 52168	9.5 mi	Spillville, IA
ZIP code 52161	9.5 mi	Ossian, IA
ZIP code 52175	9.9 mi	West Union, IA
ZIP code 52154	11 mi	Lawler, 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 52166, plotted from its record coordinates.

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

Scope ZIP code 52166. 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.