Columbia County, Oregon Property Taxes
Property Taxes in Columbia County, Oregon
Median Columbia County effective property tax rate: 0.74%, significantly lower than the national median of 1.02%.
Median Columbia County home value: $456,130
Median annual Columbia County tax bill: $3,312, higher than the national median property tax bill of $2,400.
How are property taxes in Columbia County calculated?
Property taxes in Columbia County 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.
Why do property taxes vary in Columbia County?
Property taxes vary because the assessed value, exemptions, and local tax rates all affect the final bill. Columbia County’s median effective property tax rate is 0.74%, lower than the Oregon median tax rate of 0.87%.
Can a lower tax rate still mean a higher bill?
Yes. Even with a lower rate, a higher home value can lead to a larger tax bill. Columbia County’s median annual tax bill is $3,312, which is $912 higher than Oregon’s median tax bill.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Columbia County or another part of the county, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Columbia County, Oregon Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.74%
Estimate Property Tax Bill
$3,375
$3,132
How Does the Columbia County Property Tax Calculator Work?
Use this Columbia County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Columbia County's median effective tax rate of 0.74% to generate your estimate.
Enter your property's estimated assessed value — the figure the assessor assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Columbia County's median effective tax rate is lower than Oregon's 0.87% state median, but the county's median property tax bill of $3,312 is $912 higher than the state median bill.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Columbia County.
Property Tax Rates Across Columbia County, Oregon
What Are Effective Property Tax Rates Across Columbia County?
Local government entities set tax rates, which vary widely across Columbia County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Columbia County's effective property tax rate to other counties in Oregon or the U.S. median of 1.02%.
Columbia County's median effective rate stands at 0.74%, which is lower than the national median of 1.02%. Within Columbia County, the highest rate is found in Scappoose at 0.81%, while Portland has the lowest at 0.41%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill Ă· 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 Columbia County Tax Rate
0.74%
Our median effective property tax rate (tax bill Ă· 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 Oregon Tax Rate
0.87%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Columbia County, Oregon
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Clatskanie | 0.47% | 0.57% | 0.67% | 0.88% | 1.02% |
| Columbia City | 0.68% | 0.72% | 0.78% | 0.84% | 0.91% |
| Deer Island | 0.41% | 0.51% | 0.68% | 0.82% | 0.91% |
| Portland | 0.20% | 0.32% | 0.41% | 0.51% | 0.81% |
| Rainier | 0.45% | 0.57% | 0.66% | 0.80% | 0.94% |
| Saint Helens | 0.60% | 0.68% | 0.74% | 0.79% | 0.84% |
| Scappoose | 0.60% | 0.72% | 0.81% | 0.87% | 0.92% |
| St Helens | 0.52% | 0.61% | 0.75% | 0.85% | 0.90% |
| Vernonia | 0.56% | 0.66% | 0.75% | 0.85% | 0.92% |
| Warren | 0.56% | 0.64% | 0.71% | 0.77% | 0.82% |
| Birkenfeld | N/A | N/A | N/A | N/A | N/A |
| Mist | N/A | N/A | N/A | N/A | N/A |
| Prescott | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Columbia County, Oregon
When examining property taxes in Columbia County, 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 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 Columbia 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. For example, the median tax bill in Columbia County is $3,312, compared with the national median property tax bill of $2,400 and the national median property tax rate of 1.02%. Tax bills range significantly across the county, with Warren at $4,541 and Clatskanie at $2,723. Portland has the highest median home price at $1,557,300.
Property Tax Assessment Values Across Columbia County, Oregon
Source: Ownwell
$350,910
$954,105
$1,557,300
Median Columbia County Market Value
$456,130
Median Oregon Market Value
$450,850
Median United States Market Value
$235,294
Property Tax Assessment Values Across Columbia County, Oregon
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Clatskanie | $214,043 | $283,672 | $385,945 | $528,418 | $676,103 |
| Columbia City | $329,918 | $445,080 | $523,775 | $647,305 | $856,866 |
| Deer Island | $282,410 | $367,440 | $482,940 | $618,930 | $790,264 |
| Portland | $449,220 | $679,872 | $1,557,300 | $1,689,960 | $2,004,455 |
| Rainier | $216,385 | $308,740 | $428,035 | $554,928 | $701,850 |
| Saint Helens | $277,610 | $333,430 | $451,880 | $557,955 | $699,510 |
| Scappoose | $332,768 | $433,990 | $514,870 | $628,790 | $832,236 |
| St Helens | $297,168 | $304,400 | $350,910 | $598,460 | $701,726 |
| Vernonia | $226,768 | $285,128 | $393,510 | $533,810 | $685,125 |
| Warren | $399,792 | $496,100 | $639,670 | $798,530 | $974,282 |
| Birkenfeld | N/A | N/A | N/A | N/A | N/A |
| Mist | N/A | N/A | N/A | N/A | N/A |
| Prescott | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Columbia County, Oregon
Property tax bills in Columbia County are based on the assessed value of a home and the local tax rate applied to that value. When a property’s market value changes, the assessed value can shift as well, which can affect the final bill homeowners receive. Local taxing districts, including schools and other public services, also play a role in determining how much is owed.
With a median home price of $456,130, many homeowners see tax bills that vary widely depending on neighborhood and property characteristics. The county’s tax bill range shows that some owners pay much less than others, with the 25th percentile at $2,255 and the 75th percentile at $4,347. At the higher end, the 90th percentile reaches $5,467. In Warren, the highest median tax bill is $4,541, while Clatskanie has the lowest median tax bill at $2,723.
For homeowners, this means property taxes can be a major ongoing housing cost, and even small changes in assessed value can have a noticeable impact.
Median Columbia County Tax Bill
$3,312
Median Oregon Tax Bill
$3,806
Median United States Tax Bill
$2,400
Property Tax Bills Across Columbia County, Oregon
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Clatskanie | $1,339 | $1,954 | $2,723 | $3,684 | $4,757 |
| Columbia City | $2,653 | $3,421 | $4,058 | $4,971 | $6,492 |
| Deer Island | $1,508 | $2,189 | $3,175 | $4,451 | $5,552 |
| Portland | $2,258 | $3,013 | $4,011 | $6,558 | $7,572 |
| Rainier | $1,335 | $2,044 | $2,853 | $3,762 | $4,732 |
| Saint Helens | $1,931 | $2,450 | $3,284 | $4,145 | $5,196 |
| Scappoose | $2,603 | $3,404 | $4,133 | $4,954 | $6,139 |
| St Helens | $1,469 | $1,933 | $2,945 | $3,756 | $6,007 |
| Vernonia | $1,480 | $2,139 | $2,998 | $3,999 | $5,097 |
| Warren | $2,626 | $3,322 | $4,541 | $5,726 | $6,983 |
| Birkenfeld | N/A | N/A | N/A | N/A | N/A |
| Mist | N/A | N/A | N/A | N/A | N/A |
| Prescott | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | December 31 |
Links | |
|---|---|
| Columbia Tax Assessor | |
| Website | propertysearch.columbiacountyor.gov |