Oakville, Washington sales tax rate: 8.9%
Last updated Checked monthly
The sales tax rate in Oakville, Washington is 8.9%. That’s the 6.5% state rate plus 2.4% in local taxes. It’s higher than 52 of the 110 Washington cities we checked, and 7 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Oakville combined rate
8.9%
- Washington state
- 6.5%
- Grays Harbor CountyCounty
- 1.7%
- Grays HarborSpecial district
- 0.7%
Oakville sales tax calculator
Enter a price and what you’re selling.
- WashingtonState · 6.5%$6.50
- Grays Harbor CountyCounty · 1.7%$1.70
- Grays HarborSpecial district · 0.7%$0.70
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoOakville sales tax rate breakdown
State, county and special district taxes add up to 8.9%. District lines don’t follow city limits, so some Oakville addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Washington | State | 6.5% |
| Grays Harbor County | County | 1.7% |
| Grays Harbor | Special district | 0.7% |
| Combined rate | 8.9% |
Rate history
- July 20238.9%
- July 20248.9%
- July 20258.9%
- July 20268.9%
- Today8.9%
No change since July 2023.
Sales tax near Oakville
Closest cities
Elsewhere in Grays Harbor County
- Ocean Shores9.1%
Charge the right rate in Oakville, on every order.
Zamp calculates tax at each customer’s address, special districts included, then files and pays every Washington return for you, with a sales tax team you can call.
Oakville sales tax questions.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
What is the sales tax rate in Oakville, Washington?
The combined sales tax rate in Oakville is 8.9% as of November 2, 2026. It’s made up of 6.5% Washington state tax, 1.7% Grays Harbor County, 0.7% Grays Harbor.
Why does Oakville pay Grays Harbor tax?
A special district such as Grays Harbor levies its own sales tax on top of the state, county rates. District lines don’t always follow city limits, so an address a few streets away can have a different rate. This rate was calculated for Oakville’s 98568 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Oakville?
Yes, at the full 8.9%.
Do online sellers have to collect sales tax in Oakville?
Yes, if they have nexus in Washington: more than $100,000 in Washington sales in the previous or current calendar year, or a physical presence in the state. They register with the Washington State Department of Revenue and charge the rate at the buyer’s address.
Sources. Washington State Department of Revenue · Zamp Sales Tax API, for Oakville’s 98568 ZIP code. Rates are checked monthly and are for information, not tax advice.
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