ZIP Code 52568

52568 is one of Iowa's ZIP codes, delivering to addresses in Martinsburg, Keokuk County.

City: Martinsburg
County: Keokuk County
State: Iowa
Prefix: 525xx

Where this code sits

52568 is part of the 525xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Martinsburg.

Martinsburg Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52568 delivers to without sharing its boundary.

641 Area code 641

ZIP codes nearest 52568

The ZIP codes whose reference points sit closest to 52568.
ZIP code	Distance	Delivers to
ZIP code 52563	2.2 mi	Hedrick, IA
ZIP code 52576	7.1 mi	Ollie, IA
ZIP code 52561	8.6 mi	Fremont, IA
ZIP code 52550	9.1 mi	Delta, IA
ZIP code 52591	10 mi	Sigourney, IA
ZIP code 52562	11 mi	Hayesville, IA
ZIP code 52580	12 mi	Packwood, IA
ZIP code 52543	12 mi	Cedar, 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 52568, plotted from its record coordinates.

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

Scope ZIP code 52568. 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.