Sales tax in Black Diamond, WA
The combined sales tax rate in Black Diamond, WA is about 10.3%, and ranges from 9% to 10.4% depending on the exact address.
Estimated from 3 ZIP codes covering Black Diamond. Enter your ZIP code in the calculator for a closer figure.
- ZIP codes
- 3 on file, every one crossing the city line
- County
- King
ZIP codes in Black Diamond
3 on file, every one crossing the city line. Each has its own page.
3 ZIP codes crossing the city line
Part of each of these lies outside Black Diamond. An address in one may be taxed at a neighbour's rate instead, and the figure shown is the most likely one across the whole ZIP code.
How the combined rate in Black Diamond, WA is made up
Each government below levies its own share. A seller collects them together at the till and passes each share to the authority that levied it.
| Jurisdiction | Type | Rate | Applies to | Effective | Source |
|---|---|---|---|---|---|
| Washington | state | 6.5% | all 3 ZIP codes | Mar 1, 1983 | Current jurisdiction rate and boundary files |
| Combined rate | 6.5% | ||||
What can change the tax you pay in Black Diamond, WA
- ZIP codes shared with a neighbour. 3 of Black Diamond's 3 ZIP codes are also reached by Enumclaw, Kent, Maple Valley and Sumner, so an address in one of them can owe a neighbour's rate instead of Black Diamond's.
- Your exact address. King and Pierce cover only part of this area, so an address inside them is taxed differently from one just outside. A ZIP code is a postal delivery route and was never drawn to follow tax boundaries.
- What you are buying. Categories are not taxed alike. The calculator switches between general merchandise, prepared food and lodging, which are the categories we hold rates for here.
How Black Diamond compares with the rest of Washington
Black Diamond's ~10.3% is above what most ZIP codes carry in Washington. Of the state's 715 ZIP codes with a figure, 52 land on the same one, 579 carry a lower figure and 84 a higher one. Across Washington the combined rate runs from 7.6% to 10.7%. See every city in Washington.
| Combined rate | ZIP codes | Which is this city |
|---|---|---|
| ~8% | 101 | |
| ~8.2% | 67 | |
| ~10.3% | 52 | Black Diamond |
| ~8.1% | 50 | |
| ~8.9% | 50 |
Counted from ZIP-code figures. A tilde marks a band where some ZIP codes cross a tax boundary and are counted at their most likely rate.
Previous rates
| Jurisdiction | Rate | Applied |
|---|---|---|
| Maple Valley | 2.6% | Jul 2026 – Mar 2031 |
| Black Diamond | 2.5% | Jan 2026 – Mar 2031 |
| King | 3.8% | Jan 2026 – Mar 2031 |
| Enumclaw | 2.5% | Jan 2026 – Mar 2031 |
| Kent | 3.9% | Jan 2026 – Mar 2031 |
| Sumner | 3.2% | Jul 2026 – Dec 2027 |
How sales tax is collected
The seller generally collects the tax from the buyer at the point of sale and passes it to the authorities that levied it. In most states it is added at the till rather than included in the advertised price. Read how sales tax works, including sourcing rules, online purchases and who is required to collect.
Rates last verified: Sep 4, 2026. This is when the source was last read, not when this page was last edited.
TaxAndTips provides informational estimates from published tax-rate data. Actual tax treatment can depend on the product or service, the exact address, the transaction, exemption status and applicable law. For official obligations, consult the taxing authority or a qualified tax professional.
Why you can rely on these figures
- Published rates
- State and local rates compiled from the tax authorities that levy them.
- Every figure sourced
- See the jurisdiction breakdown and the document each rate came from.
- No signup
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- Missing means missing
- Where a rate is not verified we say so instead of showing a short total.