Island County Property Tax Calculator
Locality estimate page for Island County, Washington. Use this county/locality rate for faster screening, then confirm parcel-specific details with your local tax authority.
County/Locality Effective Rate
0.67%
State Effective Rate
0.75%
Sample Annual Tax Difference
-$340
Median Home Value (ACS)
$593,300
Median Annual Tax Bill (ACS)
$3,999
Owner-Occupied Households
26,888
The typical owner-occupied home in Island County is valued at $593,300 with a median real estate tax bill of $3,999 per year — an effective rate of 0.67%. Both figures come from the same ACS release, so the ratio is an estimate rather than an aggregate of individual bills.
State Mortgage Context: Washington
Some counties follow standard FHA limits while higher-cost counties may qualify for elevated FHA limits.
State Effective Tax Rate
0.75%
FHA 1-Unit Floor
$541,287
FHA 1-Unit Ceiling
$1,249,125
In Island County, Washington, the current county-level estimate is 0.67%, or approximately $2,680 annually on a $400,000 home.
How to Use This County Estimate
Step 1
Enter your property value and assessment assumptions.
Step 2
Apply exemptions that may reduce taxable value.
Step 3
Compare county/locality estimate against statewide fallback.
Island County Property Tax Snapshot
Estimated effective rate: 0.67% · vs Washington: 0.75% · vs national benchmark: 0.90%
| Home value | Estimated annual tax | Estimated monthly tax |
|---|---|---|
| $250,000 | $1,675 | $140 |
| $400,000 | $2,680 | $223 |
| $500,000 | $3,350 | $279 |
| $750,000 | $5,025 | $419 |
| $1,000,000 | $6,700 | $558 |
Compare Nearby Property Taxes
- Island County0.67%
- Whatcom County0.70%
- Clallam County0.72%
- Kitsap County0.77%
- Snohomish County0.77%
- Benton County0.78%
- Skagit County0.79%
Source Transparency
Source: U.S. Census Bureau, ACS 5-Year Estimates (B25103 / B25077)
View sourceLast updated: August 2026
Estimates only. Confirm parcel-specific amounts with the official local taxing authority.
Need Statewide Context?
Visit Washington mortgage snapshot or return to the national calculator hub.