ZIP Code 50666

50666 is one of Iowa's ZIP codes, delivering to addresses in Plainfield, Bremer County.

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

Where this code sits

50666 is part of the 506xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Plainfield.

Plainfield Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50666 delivers to without sharing its boundary.

319 Area code 319

ZIP codes nearest 50666

The ZIP codes whose reference points sit closest to 50666.
ZIP code	Distance	Delivers to
ZIP code 50658	7.1 mi	Nashua, IA
ZIP code 50677	7.5 mi	Waverly, IA
ZIP code 50619	8.1 mi	Clarksville, IA
ZIP code 50631	11 mi	Frederika, IA
ZIP code 50670	11 mi	Shell Rock, IA
ZIP code 50676	13 mi	Tripoli, IA
ZIP code 50645	13 mi	Ionia, IA
ZIP code 50647	14 mi	Janesville, 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 50666, plotted from its record coordinates.

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

Scope ZIP code 50666. 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.