Home and mortgage
Washington County, OR Property Tax Calculator
Washington County homeowners pay a median $4,929 a year in property tax, 0.84% of a median $588,000 home: above Oregon's 0.81% but below the national 0.94%.
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Property tax in Washington County by home value, at 0.84%
| Home value | A year | A month |
|---|---|---|
| $290,000 | $2,430 | $203 |
| $440,000 | $3,687 | $307 |
| $590,000 | $4,944 | $412 |
| $880,000 | $7,374 | $615 |
| $1,180,000 | $9,888 | $824 |
Washington County against Oregon and the US
| Effective rate | Median tax | Median home value | Median household income | |
|---|---|---|---|---|
| Washington County | 0.84% | $4,929 | $588,000 | $107,772 |
| Oregon | 0.81% | $3,876 | $477,600 | $83,011 |
| United States | 0.94% | $3,119 | $332,700 | $80,734 |
How this calculator works
Median real estate taxes paid ÷ median home value in Washington County, from the Census Bureau's American Community Survey 2020–2024 5-year estimates. The calculator starts at the county's median home value and rate.
Questions people ask
What is the property tax rate in Washington County?
The effective rate is 0.84%: a median $4,929 a year on a median $588,000 home. That's the 7th highest of the 18 Oregon counties we cover.
How much is property tax on a $400,000 house in Washington County?
About $3,352 a year, $279 a month, at the county's effective rate, before any exemption.
How does Washington County compare with the rest of Oregon?
Its rate is above the state's 0.81%. Across Oregon, covered counties range from 0.52% to 0.96%.
How do I lower my Washington County property tax?
Apply for every exemption you qualify for, such as a homestead exemption, and appeal your assessment if it is higher than comparable homes sold nearby; the county assessor explains the deadlines.
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Sources
Updated by the RateHerald team. The maths is tested against worked examples; report a problem.