Thornburg ZIP code, Iowa
The ZIP code for Thornburg, IA is 50255.
- USPS city name
- 1 ZIP code
- Overlapping the city
- 1 more
- Population
- 55
- County
- Keokuk County
- State
- Iowa
Mail addressed to Thornburg uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.
ZIP codes addressed as Thornburg
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50255 | Thornburg , IA | Standard | 51 | $39,722 | — |
Other ZIP codes overlapping Thornburg
These ZIP codes cover part of Thornburg but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50136 | Keswick , IA | Standard | 376 | $75,625 | $97,800 |
Map of Thornburg ZIP codes
The ZIP codes of Thornburg, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Thornburg
The nearest larger towns are Gibson (68 people, 3.5 mi), What Cheer (580 people, 4.0 mi) and Keswick (255 people, 4.9 mi).
| Town | Population | Distance |
|---|---|---|
| Oskaloosa | 11,504 | 19.6 mi |
| Williamsburg | 3,360 | 22.1 mi |
| Marengo | 2,725 | 27.2 mi |
| Grinnell | 9,505 | 28.0 mi |
More nearby: every ZIP code in Keokuk County · Iowa ZIP codes
Cite this page
zipcodes.pro. “Thornburg, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/thornburg
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