Rules for ZIP Code 99320
Benton City, WA · Benton County
ZIP 99320 is governed by the city of West Richland, WA. We do not hold its code yet, and Benton County ordinances do not apply inside its limits.
ZIP code 99320 lies in the city of West Richland, WA, which holds about 44% of the ZIP's residents and writes its own local code. We have not added West Richland's ordinances yet, so nothing is shown below: Benton County rules govern only unincorporated land and do not reach inside West Richland.
ZIP codes do not follow city lines. 99320 also covers:
- city of Benton City~32% of residents · not covered yet
- unincorporated Benton County~24% of residents
Shares are estimates from 2020 Census geography. If your address is in one of these, its rules apply instead.
Each topic below links to the full ordinance breakdown with specific code sections, fine amounts, and answers to common questions. The data is sourced from the official municipal code and verified by our editorial team.
West Richland is not covered yet
The city of West Richland writes its own code; the county's rules do not apply inside it.Request West Richland coverage →
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