Property Taxes in Onalaska, Washington
Median Onalaska, Washington effective property tax rate: 0.70%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median Onalaska, Washington home value: $348,050
Median annual Onalaska, Washington tax bill: $2,304, lower than the national median property tax bill of $2,400.
How are property taxes in Lewis calculated?
Property taxes in Onalaska, Washington 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 Onalaska's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Onalaska, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Onalaska Property Tax Calculator Work?
Use this Onalaska property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Onalaska's median effective tax rate of 0.70% — based on actual property records in Lewis 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 Onalaska'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 Onalaska: rates range from 0.70% in 98570 to 0.70% in 98570, 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 Onalaska.
About Onalaska Property Taxes
About Property Taxes in Onalaska, Lewis, Washington
Onalaska’s median effective property tax rate of 0.70% is lower than the Washington state median of 0.92% and lower than the national median of 1.02%. This rate reflects the Lewis County base levy combined with local school district levies and Local improvement districts (LIDs) that vary by subdivision throughout the city.
Property tax rates are not uniform across Onalaska. Homeowners in the 98570 ZIP code carry a median effective rate of 0.70%, while those in the lowest ZIP also pay 0.70%. This spread shows how school district boundaries and local assessment districts are drawn across Lewis County. Understanding which part of Onalaska you live in can make a meaningful difference to your annual tax bill.
Onalaska homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the July 1, 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 Onalaska, Lewis County, Washington
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 Onalaska's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.
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 Onalaska Tax Rate
0.70%
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 Lewis County Tax Rate
0.70%
Median Effective Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Onalaska, Lewis County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98570 | 0.63% | 0.64% | 0.70% | 0.71% | 0.71% |
Source: Ownwell
Property Tax Assessment Values Across Onalaska, Lewis County, Washington
When examining property taxes in Onalaska, Washington, 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 Lewis County assessor 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 Lewis County, assessment notices are sent in the spring 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 Onalaska.
For example, the median home price in Onalaska is $348,050, with tax bills ranging significantly across the county. 98570 has the highest median home price at $348,050.
Property Tax Assessment Values Across Onalaska, Lewis County, Washington
Source: Ownwell
$112,400
$271,150
$429,900
Median Onalaska Market Value
$348,050
Median Lewis County Market Value
$329,400
Median Washington Market Value
$501,600
Median United States Market Value
$274,101
Property Tax Assessment Values Across Onalaska, Lewis County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98570 | $65,120 | $215,450 | $348,050 | $485,600 | $607,900 |
Source: Ownwell
Property Tax Bills Across Onalaska, Lewis County, Washington
How are property tax bills calculated in Onalaska?
Property tax bills in Onalaska are based on a home’s assessed value and the local tax rate set by taxing authorities. When a property’s market value changes, the assessed value can change too, which affects the final bill. For a home with a median price of $348,050, the tax bill can vary widely depending on exemptions, local levies, and district funding needs.
What factors influence the amount homeowners pay?
The biggest factors are the assessed value of the home, the tax rate, and any applicable exemptions. In Lewis County, the median property tax bill is $2,304, which is close to the national median property tax bill of $2,400. Bills in Onalaska can range from $1,266 at the 25th percentile to $3,292 at the 75th percentile, with the 90th percentile reaching $4,121. That means homeowners with similar homes may still pay very different amounts.
How does this affect homeowners?
Higher assessed values usually lead to higher property tax bills, which can increase monthly housing costs and make long-term ownership more expensive.
Median Onalaska Tax Bill
$2,304
Median Lewis County Tax Bill
$2,244
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$3,209
Property Tax Bills Across Onalaska, Lewis County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98570 | $306 | $1,266 | $2,304 | $3,292 | $4,121 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
| Tax Bill | |
| Issued | February 10 |
| Due Date #1 | April 30 |
| Due Date #2 | October 31 |
Links | |
|---|---|
| Lewis Tax Assessor | |
| Website | parcels.lewiscountywa.gov |