ZIP Code 50579

50579 is one of Iowa's ZIP codes, delivering to addresses in Rockwell City, Calhoun County.

City: Rockwell City
County: Calhoun County
State: Iowa
Prefix: 505xx

Where this code sits

50579 is part of the 505xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rockwell City.

Rockwell City Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50579 delivers to without sharing its boundary.

ZIP codes nearest 50579

The ZIP codes whose reference points sit closest to 50579.
ZIP code	Distance	Delivers to
ZIP code 50551	9.1 mi	Jolley, IA
ZIP code 50552	9.7 mi	Knierim, IA
ZIP code 50586	9.7 mi	Somers, IA
ZIP code 51453	10 mi	Lohrville, IA
ZIP code 50563	10 mi	Manson, IA
ZIP code 51449	11 mi	Lake City, IA
ZIP code 50575	11 mi	Pomeroy, IA
ZIP code 50561	12 mi	Lytton, 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 50579, plotted from its record coordinates.

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

Scope ZIP code 50579. 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.