Island County property tax
Homeowners in Island County, Washington typically pay about 0.67% of their home's value in property tax each year — a median bill of $3,999 on a median home value of $593,300.
Typical effective rate
0.67%
higher than 63% of U.S. counties
Median tax paid
$3,999
per year
Median home value
$593,300
In WA
#29
of 39 ranked counties
At a glance
- Effective rate 0.67% — 28% lower than the U.S. median of 0.94%, and 16% lower than the Washington median of 0.81%.
- With vs. without a mortgage — median tax $3,918 for mortgaged homes, $4,138 for homes owned outright.
- State ranking — 29th highest effective rate of 39 ranked Washington counties; nationally it sits around the 37th percentile.
Estimate a bill for Island County
Apply this county's typical effective rate (0.67%) to a home value of your choice.
Frequently asked questions
What is the property tax rate in Island County, WA?
The typical effective property-tax rate in Island County is 0.67% of a home's value per year, based on median taxes paid ($3,999) divided by the median home value ($593,300) in the Census ACS 2020–2024 5-year estimates. This is a typical burden for comparison, not a statutory mill rate.
How much is property tax on a typical home in Island County?
The median owner-occupied home in Island County is valued at $593,300, and the median real estate tax paid is $3,999 per year. Homes with a mortgage have a median tax of $3,918, versus $4,138 for homes without one.
How does Island County compare to the rest of Washington?
Island County's effective rate is 16% lower than the Washington median, ranking 29th of 39 ranked counties in the state.
Compare nearby Washington counties
Counties ranked closest to Island County by in-state effective rate. Open the comparison tool or see all Washington counties.
| In-state | County | Effective rate | Median tax |
|---|---|---|---|
| 26 | Kittitas County | 0.71% | $3,552 |
| 27 | Jefferson County | 0.71% | $3,818 |
| 28 | Whatcom County | 0.70% | $4,087 |
| 30 | Lewis County | 0.67% | $2,581 |
| 31 | Skamania County | 0.67% | $3,532 |
| 32 | Garfield County | 0.66% | $1,574 |
Official data & resources for Island County
- Island County Census profile (data.census.gov) — housing, value and tax figures for this county.
- Table B25103 for Island County — median real estate taxes paid (the source for the tax figures above).
- Table B25077 for Island County — median home value.
- Federal forms & is property tax deductible? — IRS Pub 530, Schedule A and the SALT cap, plus your state tax agency.
Finding your exact bill
Your county or municipal assessor (sometimes called the appraisal district, property appraiser, or tax collector) sets the assessed value and the exact millage that produces your bill. Search for "[county name] [state] assessor" or "property tax" on an official .gov site.
Figures on this page are Census survey medians for the whole county (2020–2024 5-year), not an assessment of any individual property. Rates, exemptions and assessment practices vary by municipality and school district within a county.