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    King County (Seattle), Washington

    King County (Seattle)
    tax calculators for 2026.

    Estimate property and sales tax in King County (Seattle). The county has an average effective property tax rate of 0.84% and a typical combined sales tax of 10.35%.

    King County (Seattle) Property Tax

    Estimate annual property tax in King County (Seattle) from your home's value.

    King County (Seattle) Sales Tax

    Add the King County (Seattle) combined sales tax (10.35%) to any purchase.

    Taxes in King County (Seattle)

    King County (Seattle) sits in Washington, so residents pay Washington state taxes plus county and city rates. Property tax averages 0.84% of home value, and the combined sales tax is around 10.35%.

    For a complete picture, pair these with the Washington state tax calculators. These tools are estimates — verify exact figures with the King County Assessor (kingcounty.gov).

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