Island County, WA Property Taxes (2026)

Island County owners pay a median of $3,765 a year on a median home value of $535,300, an effective rate of 0.70%. That's the 31st-highest rate of 39 Washington counties with Census data, below the Washington county median of 0.79%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

0.70%

31st highest of 39 in WA

Median annual bill

$3,765

~$314/month

Median home value

$535,300

Washington county median

0.79%

Effective rate

What a protest could save you in Island County

Enter the market value from your appraisal notice. We apply Island County's 0.70% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$3,747
Savings at 10–15% off
$375–$562
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Island County vs. Washington vs. U.S. property tax rates

Island County0.70%
Washington county median0.79%
U.S. county median0.84%

Key stat: Island County's effective property tax rate is 0.70%, vs. 0.79% for the median Washington county and 0.84% for the median U.S. county. It ranks 31st of 39 in Washington. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in Island County

  1. 1

    Review your assessment notice

    Check the assessed value from the Island County Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Island County deadline is July 1 or 60 days after notice. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the County Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $3,765 bill, 10–15% off is $377–$565 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Washington

Washington homeowners may qualify for exemptions that reduce taxable value. Check with the Island County Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in Island County, Washington?
The median effective property tax rate in Island County is 0.70%: a median annual bill of $3,765 on a median home value of $535,300. That's the 31st-highest rate of 39 Washington counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in Island County?
The median Island County property tax bill is $3,765 a year, about $314 a month, compared with a Washington county median of $2,860.
What is the deadline to appeal property taxes in Island County?
The deadline to appeal in Island County is July 1 or 60 days after notice. Missing it means waiting until the next assessment cycle.
Is Island County a high property tax area?
Island County's 0.70% effective rate is below the Washington county median of 0.79% and below the U.S. county median of 0.84%. That's the 31st-highest rate of 39 Washington counties with Census data.
Can TaxDrop help lower my Island County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

San Juan County

Rate: 0.57%

Median bill: $4,131

Kitsap County

Rate: 0.80%

Median bill: $4,030

Snohomish County

Rate: 0.79%

Median bill: $5,121

Skagit County

Rate: 0.82%

Median bill: $4,008

Jefferson County

Rate: 0.73%

Median bill: $3,596

Clallam County

Rate: 0.74%

Median bill: $2,860

King County

Rate: 0.84%

Median bill: $6,785

Mason County

Rate: 0.75%

Median bill: $2,833

← All 39 Washington counties

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