Property Tax & Income in San Juan County, Washington
San Juan County has an effective property tax rate of 0.53%. On the median home value of $799,200, that's roughly $4,253 per year. Median household income is $84,800.
What you'll pay, at a glance
Property taxes are the largest local tax most homeowners pay. The effective rate measures the real tax bill as a share of home value — a more useful number than the nominal “mill rate,” because assessment practices vary county to county.
| Metric | San Juan County | Washington (state context) |
|---|---|---|
| Effective property tax rate1 | 0.53% | 0.73% |
| Median home value1 | $799,200 | — |
| State income tax3 | No state income tax | No state income tax |
| State sales tax3 | 9.57% combined | 9.57% combined |
How this is calculated
The effective property tax rate is the median real-estate tax bill divided by the median home value — both for owner-occupied homes, from the U.S. Census Bureau's American Community Survey (ACS 5-year estimates)1. Median income is also from the ACS1. Federal and state income-tax figures use IRS2 and Tax Foundation3 data.
About San Juan County, WA
San Juan County’s effective property tax rate of 0.532% sits well below Washington’s statewide median of 0.730% and the national median of 0.794%. Among the state’s 39 counties, it ranks last—39th—meaning no county in Washington taxes property at a lower effective rate. That distinction matters along the county’s waterfront communities, from Blakely Island to Deer Harbor to Eastsound, where median home values reach $799,200. Even at that price point, the median annual real-estate tax bill lands at $4,253, a figure shaped by the low rate rather than by cheap housing. Households here earn a median of $84,800, with per-capita income at $63,950. The gap between this county’s rate and both state and national benchmarks signals a property tax climate that leans unusually lightly on owners compared with most of the country.