ZIP Code 50603

50603 is one of Iowa's ZIP codes, delivering to addresses in Alta Vista, Chickasaw County.

City: Alta Vista
County: Chickasaw County
State: Iowa
Prefix: 506xx

Where this code sits

50603 is part of the 506xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Alta Vista.

Alta Vista Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50603 delivers to without sharing its boundary.

641 Area code 641

ZIP codes nearest 50603

The ZIP codes whose reference points sit closest to 50603.
ZIP code	Distance	Delivers to
ZIP code 50661	2.2 mi	North Washington, IA
ZIP code 50645	8.1 mi	Ionia, IA
ZIP code 50620	8.4 mi	Colwell, IA
ZIP code 50659	8.5 mi	New Hampton, IA
ZIP code 50628	9.1 mi	Elma, IA
ZIP code 50616	14 mi	Charles City, IA
ZIP code 50658	15 mi	Nashua, IA
ZIP code 52154	15 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 50603, plotted from its record coordinates.

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

Scope ZIP code 50603. 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.