Plymouth ZIP code, Washington
The ZIP code for Plymouth, WA is 99346, and its area code is 509.
- USPS city name
- 1 ZIP code
- Population
- 198
- Area code
- 509
- County
- Benton County
- State
- Washington
NANPA lists no telephone rate centre for Plymouth itself, so these are the area codes of the nearest one, Kennewick (9.9 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes addressed as Plymouth
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
99346 | Plymouth , WA | Standard | 198 | $50,865 | $209,200 |
Map of Plymouth ZIP codes
The ZIP codes of Plymouth, WA, 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 Plymouth
The nearest larger towns are Umatilla, OR (7,508 people, 7.9 mi), Irrigon, OR (2,120 people, 13 mi) and Kennewick (85,295 people, 13 mi).
| Town | Population | Distance |
|---|---|---|
| Umatilla, OR | 7,508 | 7.9 mi |
| Kennewick | 85,295 | 13.0 mi |
| Hermiston, OR | 19,546 | 13.7 mi |
| Finley | 5,634 | 15.7 mi |
| Richland | 62,753 | 17.7 mi |
| Benton City | 3,695 | 18.2 mi |
| Pasco | 79,575 | 18.4 mi |
| Burbank | 3,589 | 19.2 mi |
| West Richland | 17,586 | 20.0 mi |
| Boardman, OR | 4,064 | 23.0 mi |
| Prosser | 6,305 | 25.4 mi |
More nearby: every ZIP code in Benton County · Washington ZIP codes
Cite this page
zipcodes.pro. “Plymouth, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/plymouth
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