Lost River ZIP codes, Idaho
No ZIP code is named for Lost River, ID; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 83251 and 83255. Its area codes are 208 and 986.
- USPS city name
- 0 ZIP codes
- Overlapping the city
- 2 more
- Population
- 55
- County
- Custer County
- State
- Idaho
NANPA lists no telephone rate centre for Lost River itself, so these are the area codes of the nearest one, Mackay (0.0 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes covering Lost River
These ZIP codes cover part of Lost River but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
83251 | Mackay , ID | Standard | 1,443 | $73,482 | $366,900 |
83255 | Moore , ID | Standard | 1,222 | $70,714 | $283,200 |
Map of Lost River ZIP codes
The ZIP codes of Lost River, ID, 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 Lost River
The nearest larger towns are Moore (228 people, 14 mi), Mackay (602 people, 15 mi) and Arco (850 people, 17 mi).
More nearby: every ZIP code in Custer County · Idaho ZIP codes
Cite this page
zipcodes.pro. “Lost River, ID ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/id/lost-river
Underlying data is public domain or openly licensed — sources, vintages and licences.