ZIP Code 50591

50591 is one of Iowa's ZIP codes, delivering to addresses in Thor, Humboldt County.

City: Thor
County: Humboldt County
State: Iowa
Prefix: 505xx

Where this code sits

50591 is part of the 505xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Thor.

Thor Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50591 delivers to without sharing its boundary.

515 Area code 515

ZIP codes nearest 50591

The ZIP codes whose reference points sit closest to 50591.
ZIP code	Distance	Delivers to
ZIP code 50533	7.1 mi	Eagle Grove, IA
ZIP code 50516	7.5 mi	Badger, IA
ZIP code 50542	7.7 mi	Goldfield, IA
ZIP code 50545	7.8 mi	Hardy, IA
ZIP code 50529	8.4 mi	Dakota City, IA
ZIP code 50594	8.8 mi	Vincent, IA
ZIP code 50548	9.1 mi	Humboldt, IA
ZIP code 50577	11 mi	Renwick, 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 50591, plotted from its record coordinates.

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

Scope ZIP code 50591. 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.