WA tax rules›Benton County

Benton County, WA Sales Tax (2026)

Verified Jun 18, 2026

Combined sales tax 8.80% (6.50% WA state + 2.30% local) in Kennewick; varies within county by city.

Official source: dor.wa.gov →

General legal information, not legal advice — verify important decisions with a licensed professional.

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