ZIP Code 52078

52078 is one of Iowa's ZIP codes, delivering to addresses in Worthington, Dubuque County.

City: Worthington
County: Dubuque County
State: Iowa
Prefix: 520xx

Where this code sits

52078 is part of the 520xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Worthington.

Worthington Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52078 delivers to without sharing its boundary.

563 Area code 563

ZIP codes nearest 52078

The ZIP codes whose reference points sit closest to 52078.
ZIP code	Distance	Delivers to
ZIP code 52046	6.2 mi	Farley, IA
ZIP code 52040	6.3 mi	Dyersville, IA
ZIP code 52237	7.9 mi	Hopkinton, IA
ZIP code 52033	8.7 mi	Cascade, IA
ZIP code 52045	9.6 mi	Epworth, IA
ZIP code 52041	11 mi	Earlville, IA
ZIP code 52223	12 mi	Delhi, IA
ZIP code 52036	12 mi	Delaware, 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 52078, plotted from its record coordinates.

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

Scope ZIP code 52078. 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.