Dayton, Columbia County, Washington Property Taxes

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Property Taxes in Dayton, Washington

Median Dayton, Washington effective property tax rate: 1.09%, significantly higher than the national median of 1.02%, and higher than the Washington state median of 0.92%.
Median Dayton, Washington home value: $149,640
Median annual Dayton, Washington tax bill: $1,546, $854 lower than the national median property tax bill of $2,400.

How are property taxes in Columbia calculated?

Property taxes in Dayton, 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 Dayton's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Dayton, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Dayton, Columbia County, Washington Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.09%

Estimate Property Tax Bill

$1,631

$1,514

How Does the Dayton Property Tax Calculator Work?

Use this Dayton property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Dayton's median effective tax rate of 1.09% — based on actual property records in Columbia County — to generate your estimate.

Enter your property's estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Dayton's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.

Dayton's median effective tax rate is higher than the Washington state median tax rate of 0.92% and the median property tax bill is $1,546, which is $854 lower than the state median property tax bill. Your bill may vary by ZIP code within Dayton, with the highest and lowest median tax bill both at $1,546 in 99328. For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Dayton.

About Dayton Property Taxes

About Property Taxes in Dayton, Columbia, Washington

Dayton’s median effective property tax rate of 1.09% is higher than the Washington state median of 0.92% and higher than the national median of 1.02%. This rate reflects the Columbia County base levy combined with local levies that shape what homeowners pay across the city.

Property tax rates are not uniform across Dayton. Homeowners in the 99328 ZIP code carry a median effective rate of 1.09%, while those in the same ZIP code also pay 1.09%. This reflects how assessed values and local taxing districts are applied within Columbia County, making it important to understand how your property is taxed.

Dayton homeowners who believe their assessed value is too high can file a formal appeal with the 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 Dayton, Columbia 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 Dayton's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.

Property Tax Rates Across Dayton, Columbia County, Washington

Source: Ownwell

0.77%

1.04%

1.31%

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 Dayton Tax Rate

1.09%

Median Effective Columbia County Tax Rate

1.09%

Median Effective Washington Tax Rate

0.92%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Dayton, Columbia County, Washington

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
99328	1.03%	1.09%	1.09%	1.12%	1.14%

Source: Ownwell

Property Tax Assessment Values Across Dayton, Columbia County, Washington

When examining property taxes in Dayton, 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 Columbia County 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 Columbia County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.

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 Dayton.

For example, the median home price in Dayton is $149,640, with tax bills ranging significantly across the county. 99328 has the highest median home price at $149,640.

Property Tax Assessment Values Across Dayton, Columbia County, Washington

Source: Ownwell

$29,440

$158,370

$287,300

Median Dayton Market Value

$149,640

Median Columbia County Market Value

$142,200

Median Washington Market Value

$501,600

Median United States Market Value

$235,294

Property Tax Assessment Values Across Dayton, Columbia County, Washington

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
99328	$10,802	$54,290	$149,640	$234,370	$326,994

Source: Ownwell

Property Tax Bills Across Dayton, Columbia County, Washington

Property tax bills in Dayton are calculated by applying local tax rates to a home’s assessed value, which is based on the market value of the property. The assessed value is the starting point for the bill, and the final amount depends on the tax rates set by local taxing authorities in Columbia County and other applicable jurisdictions.

For a home with a median market value of $149,640, the property tax bill can vary widely depending on the assessment and local levies. In Dayton, the 25th percentile tax bill is $466, while the 75th percentile tax bill is $2,585 and the 90th percentile tax bill is $3,686. The median tax bill in ZIP code 99328 is $1,546.

These differences show how property taxes can affect homeowners differently, even within the same city. A higher assessed value or higher local tax rate can increase the bill, while a lower assessment can reduce it.

Property Tax Bills Across Dayton, Columbia County, Washington

Source: Ownwell

$227

$1,886

$3,545

Median Dayton Tax Bill

$1,546

Median Columbia County Tax Bill

$1,401

Median Washington Tax Bill

$4,512

Median United States Tax Bill

$2,400

Property Tax Bills Across Dayton, Columbia County, Washington

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
99328	$100	$466	$1,546	$2,585	$3,686

Source: Ownwell

Don't miss the deadline to appeal!

Dates
Appeal Deadline	July 1

Links
Columbia Tax Assessor
Website	64.184.153.98

Frequently Asked Property Tax Questions in Dayton, Washington

How are property taxes calculated in Dayton, Washington?

Property taxes in Dayton, Washington are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.

How do I appeal my property taxes in Dayton, Washington?

To appeal your property taxes in Dayton, Washington, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.

What property tax exemptions are available in Dayton, Washington?

Common property tax exemptions in Dayton, Washington include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.

When are property taxes due in Dayton, Washington?

Property tax deadlines in Dayton, Washington vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.

How can Ownwell help reduce my property taxes in Dayton, Washington?

Ownwell provides professional property tax appeal services in Dayton, Washington. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.