ZIP Code 50631

50631 is one of Iowa's ZIP codes, delivering to addresses in Frederika, Bremer County.

City: Frederika
County: Bremer County
State: Iowa
Prefix: 506xx

Where this code sits

50631 is part of the 506xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Frederika.

Frederika Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50631 delivers to without sharing its boundary.

319 Area code 319

ZIP codes nearest 50631

The ZIP codes whose reference points sit closest to 50631.
ZIP code	Distance	Delivers to
ZIP code 50676	5.4 mi	Tripoli, IA
ZIP code 50630	7.6 mi	Fredericksburg, IA
ZIP code 50677	8.9 mi	Waverly, IA
ZIP code 50674	9.9 mi	Sumner, IA
ZIP code 50666	11 mi	Plainfield, IA
ZIP code 50659	12 mi	New Hampton, IA
ZIP code 50658	12 mi	Nashua, IA
ZIP code 50668	14 mi	Readlyn, 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 50631, plotted from its record coordinates.

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

Scope ZIP code 50631. 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.