ZIP Code 50645

50645 is one of Iowa's ZIP codes, delivering to addresses in Ionia, Chickasaw County.

City: Ionia
County: Chickasaw County
State: Iowa
Prefix: 506xx

Where this code sits

50645 is part of the 506xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ionia.

Ionia Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50645 delivers to without sharing its boundary.

641 Area code 641

ZIP codes nearest 50645

The ZIP codes whose reference points sit closest to 50645.
ZIP code	Distance	Delivers to
ZIP code 50658	6.4 mi	Nashua, IA
ZIP code 50661	6.5 mi	North Washington, IA
ZIP code 50603	8.1 mi	Alta Vista, IA
ZIP code 50659	8.8 mi	New Hampton, IA
ZIP code 50620	9.7 mi	Colwell, IA
ZIP code 50616	9.8 mi	Charles City, IA
ZIP code 50666	13 mi	Plainfield, IA
ZIP code 50435	14 mi	Floyd, 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 50645, plotted from its record coordinates.

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

Scope ZIP code 50645. 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.