West Richland, Washington

1 ZIP code · Pacific time

ZIP codes (largest first)

99353 · 19,251
Population17,586
StateWashington
CountyBenton County
Time zonePacific
Land area22.12 sq mi

Area codes in this area

509

These are the area codes that most often serve West Richland (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

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Population: U.S. Census Bureau, ACS 5-year estimates, 2024.