Property Taxes in Farmington, Washington
Median Farmington, Washington effective property tax rate: 1.42%, significantly higher than the national median of 1.02%, and higher than the Washington state median of 0.92%.
Median Farmington, Washington home value: $82,684
Median annual Farmington, Washington tax bill: $1,163, lower than the national median property tax bill of $2,400.
How are property taxes in Whitman calculated?
Property taxes in Farmington, 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 Farmington's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Farmington, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Farmington Property Tax Calculator Work?
Use this Farmington property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Farmington's median effective tax rate of 1.42% — based on actual property records in Whitman County — to generate your estimate.
Enter your property's estimated assessed value — the figure used to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Farmington'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 Farmington: rates are 1.42% in 99128, primarily due to differences in local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Farmington.
About Farmington Property Taxes
About Property Taxes in Farmington, Whitman, Washington
Farmington’s median effective property tax rate of 1.42% is lower than the Washington state median of 0.92% and higher than the national median of 1.02%. This rate reflects the Whitman County base levy combined with local school district levies and local improvement districts that can vary by subdivision throughout the city.
Property tax rates are not uniform across Farmington. Homeowners in ZIP code 99128 carry a median effective rate of 1.42%, while the lowest rate is also 1.42%. This means there is no spread across the city’s ZIP code data, but school district boundaries and local assessment districts can still affect how property taxes are assessed in Whitman County.
Farmington 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 Farmington, Whitman 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 Farmington'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 Farmington Tax Rate
1.42%
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 Whitman County Tax Rate
1.40%
Median Effective Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Farmington, Whitman County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99128 | 0.89% | 1.18% | 1.42% | 1.60% | 1.60% |
Source: Ownwell
Property Tax Assessment Values Across Farmington, Whitman County, Washington
When examining property taxes in Farmington, 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 Whitman County appraisal district 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 are sent in the spring each year and typically reach your mailbox by the middle of the month. 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.
For example, the median home price in Farmington is $82,684, with tax bills ranging significantly across the county. ZIP code 99128 has the highest median home price at $82,684.
Property Tax Assessment Values Across Farmington, Whitman County, Washington
Source: Ownwell
$9,310
$119,922
$230,534
Median Farmington Market Value
$82,684
Median Whitman County Market Value
$123,566
Median Washington Market Value
$501,600
Median United States Market Value
$274,101
Property Tax Assessment Values Across Farmington, Whitman County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99128 | $16,516 | $37,970 | $82,684 | $176,488 | $285,475 |
Source: Ownwell
Property Tax Bills Across Farmington, Whitman County, Washington
Property tax bills in Farmington are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. For homeowners, this means the bill depends on both what the home is worth and the tax rates set by local governments in Whitman County. A home with a higher assessed value generally faces a higher tax bill, while lower-valued homes usually pay less.
In Farmington, the median home price is $82,684, and the median property tax bill is $1,163, which is below the national median property tax bill of $2,400. Bills can vary widely, with the 25th percentile at $565 and the 90th percentile at $3,197. That range shows how property taxes can affect homeowners differently depending on home value and location, making the tax bill an important part of overall housing costs.
Median Farmington Tax Bill
$1,163
Median Whitman County Tax Bill
$1,761
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$3,209
Property Tax Bills Across Farmington, Whitman County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99128 | $165 | $565 | $1,163 | $2,223 | $3,197 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| Whitman Tax Assessor | |
| Website | terrascan.whitmancounty.net |