Washington County, Washington County, Oregon Property Taxes
Property Taxes in Washington County, Oregon
Median Washington County, Oregon effective property tax rate: 1.04%, significantly lower than the national median of 1.02%, and higher than the Oregon state median of 0.87%.
Median Washington County, Oregon home value: $840,060
Median annual Washington County, Oregon tax bill: $8,723, $6,323 higher than the national median property tax bill of $2,400.
How are property taxes in Washington County calculated?
Property taxes in Washington County, Oregon are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Washington County's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Washington County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Washington County, Washington County, Oregon Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.04%
Estimate Property Tax Bill
$8,737
$8,107
How Does the Washington County Property Tax Calculator Work?
Use this Washington County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Washington County's median effective tax rate of 1.04% — based on actual property records in Washington County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Washington County's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Washington County: rates range from 1.04% in Washington County to 1.04% in Washington County, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Washington County.
About Washington County Property Taxes
About Property Taxes in Washington County, Oregon
Washington County’s median effective property tax rate of 1.04% is higher than the Oregon state median of 0.87% and higher than the national median of 1.02%. This rate reflects the Washington County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the county.
Property tax rates are not uniform across Washington County. Homeowners in the highest ZIP code carry a median effective rate of 1.04%, while those in the lowest ZIP code pay 1.04%. This spread reflects how school district boundaries and local assessment districts are drawn across Washington County. Understanding which part of Washington County you live in can make a meaningful difference to your annual tax bill.
Washington County homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the December 31, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Washington County, Washington County, Oregon
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Washington County's effective property tax rate to other cities in Oregon and the median property tax rates in Oregon and the U.S.
Property Tax Rates Across Washington County, Washington County, Oregon
Source: Ownwell
0.58%
0.95%
1.33%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Washington County Tax Rate
1.04%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Washington County Tax Rate
0.95%
Median Effective Oregon Tax Rate
0.87%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Washington County, Washington County, Oregon
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|
Source: Ownwell
Property Tax Assessment Values Across Washington County, Washington County, Oregon
When examining property taxes in Washington County, Oregon, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Washington County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Washington County, assessment notices are sent in the fall each year. They'll typically reach your mailbox by the middle of October.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Washington County.
For example, the median home price in Washington County is $840,060, with tax bills ranging significantly across the county. The median property tax bill is $8,723, compared with the national median property tax bill of $2,400 and the national median property tax rate of 1.02%.
Property Tax Assessment Values Across Washington County, Washington County, Oregon
Source: Ownwell
$290,450
$643,180
$995,910
Median Washington County Market Value
$840,060
Median Washington County Market Value
$545,280
Median Oregon Market Value
$450,850
Median United States Market Value
$235,294
Property Tax Assessment Values Across Washington County, Washington County, Oregon
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|
Source: Ownwell
Property Tax Bills Across Washington County, Washington County, Oregon
How Are Property Tax Bills Calculated in Washington County, Oregon?
Property tax bills in Washington County are based on the assessed value of a home, not the market value, and the local tax rate applied to that assessment. For a home with a median value of $840,060, the property tax bill is $8,723, which is well above the national median property tax bill of $2,400 and the national median property tax rate of 1.02%.
Several factors affect the final bill, including the home’s assessed value, local taxing districts, and any voter-approved levies or special assessments. Because the bill is tied to assessment, homeowners with higher-valued properties often face larger tax obligations, even if their income has not changed.
For homeowners, this can mean a significant annual expense that affects monthly budgeting and long-term housing costs. Understanding how the bill is calculated can help homeowners better evaluate whether their property taxes are accurate and whether their assessment reflects the home’s true taxable value.
Property Tax Bills Across Washington County, Washington County, Oregon
Source: Ownwell
$1,720
$5,743
$9,766
Median Washington County Tax Bill
$8,723
Median Washington County Tax Bill
$5,108
Median Oregon Tax Bill
$3,806
Median United States Tax Bill
$2,400
Property Tax Bills Across Washington County, Washington County, Oregon
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | December 31 |
Links | |
|---|---|
| Washington Tax Assessor | |
| Website | washcotax.co.washington.or.us |