Columbia County
•
Washington (WA)
2 ZIP Code
Streamlined Sales Tax (SST) Member
Columbia County, WA Sales Tax Rates 2026
2026 sales tax rate guide for Columbia County, WA. Average combined tax rate is 8.30% with local jurisdictions ranging up to 8.40%.
Average Combined Rate
8.30%
Estimated Tax Range: 8.20% - 8.40%
⚡ Direct Tax Answer & Key Takeaway
As of 2026, the local county sales tax rate in Columbia County (Washington) is 0.00%. Combined sales tax rates across cities in this county range from 8.20% to 8.40% (averaging 8.30%).
County Tax
0.00%
Average Combined Rate
8.30%
Max Local Rate
8.40%
Indexed Cities
2
Cities & Towns in Columbia County
| City | Combined Sales Tax Rate | Action |
|---|---|---|
| Dayton | 8.40% | View Tax Rates → |
| Starbuck | 8.20% | View Tax Rates → |
📋 State Tax Rules & Compliance Guide
Sourcing Rule:
Destination-based
Groceries & Food:
Exempt (0%)
Clothing & Apparel:
Taxable
SaaS & Digital Goods:
Fully Taxable (Digital automated services / prewritten software)
Economic Nexus Threshold:
$100,000 combined gross receipts
Official Tax Authority:
Washington State Department of Revenue ↗
Interactive Sales Tax Calculator
Calculate exact sales tax and total purchase price instantly.
Address-Specific Rates
SST Member
Standard State
Rates current for 2026
$
$
Estimated Tax Range:
Combined Sales Tax Rate:
State Tax:
Combined Sales Tax Rate:
State Tax ()
County Tax ()
City Tax ()
Special / District Tax ()
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Estimated Total Range:
Total Purchase Price
ZIP Codes in Columbia County
❓ Frequently Asked Questions
Key questions and answers regarding sales tax rates, exemptions, and compliance.