ZIP code · Plymouth · Washington · United States
ZIP code 99346 — Plymouth
ZIP code 99346 serves Plymouth, Washington.
- Postal code
- 99346Single source Value from one source, not cross-checked.
- City
- Plymouth
- County
- Benton
- State
- Washington
- Country
- United States
- Coordinates
- 45.9301, -119.4023 — precision precise (locality)
View on OpenStreetMap - Population
- 269 (ZCTA, ACS 5-year)
- Median household income
- $50,588
- Median age
- 41
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page