ZIP Code 50623

50623 is one of Iowa's ZIP codes, delivering to addresses in Dewar, Black Hawk County.

City: Dewar
County: Black Hawk County
State: Iowa
Prefix: 506xx

Where this code sits

50623 is part of the 506xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dewar.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50623 delivers to without sharing its boundary.

319 Area code 319

ZIP codes nearest 50623

The ZIP codes whose reference points sit closest to 50623.
ZIP code	Distance	Delivers to
ZIP code 50667	4.0 mi	Raymond, IA
ZIP code 50707	4.6 mi	Evansdale, IA
ZIP code 50626	4.8 mi	Dunkerton, IA
ZIP code 50703	5.5 mi	Waterloo, IA
ZIP code 50614	5.9 mi	Cedar Falls, IA
ZIP code 50704	5.9 mi	Waterloo, IA
ZIP code 50702	6.9 mi	Waterloo, IA
ZIP code 50634	7.6 mi	Gilbertville, 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 50623, plotted from its record coordinates.

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

Scope ZIP code 50623. 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.