Sales tax in Ontario, CA
The combined sales tax rate in Ontario, CA is 8.75%, effective 2026-07-01.
Last verified
- ZIP codes
- 5 on file · 2 wholly inside the city limits
- County
- San Bernardino County
- Levied by
- California and Ontario
How the combined rate in Ontario, CA 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 | Effective | Source |
|---|---|---|---|---|
| California | state | 7.25% | Jan 1, 2017 | California sales and use tax rates by jurisdiction |
| Ontario | city | 1.5% | Jul 1, 2026 | California sales and use tax rates by jurisdiction |
| Combined rate | 8.75% | |||
ZIP codes in Ontario
5 on file — 2 wholly inside the city limits and 3 crossing them. Each has its own page.
2 ZIP codes wholly inside Ontario
Every address in these is inside the city limits, so all of them pay Ontario's rate.
| ZIP code | Combined rate | Also reaches |
|---|---|---|
| 91761 | 8.75% | no other city |
| 91764 | 8.75% | no other city |
3 ZIP codes crossing the city line
Part of each of these lies outside Ontario. 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.
| ZIP code | Combined rate | Also reaches |
|---|---|---|
| 91710 | 8.75% | Chino, Chino Hills and Unincorporated San Bernardino County |
| 91762 | 8.75% | Chino, Montclair and Unincorporated San Bernardino County |
| 91786 | 7.75% | Unincorporated San Bernardino County and Upland |
What can change the tax you pay in Ontario, CA
- ZIP codes shared with a neighbour. 3 of Ontario's 5 ZIP codes are also reached by Unincorporated San Bernardino County, Chino, Chino Hills and Montclair and 1 other place, so an address in one of them can owe a neighbour's rate instead of Ontario's.
- 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 Ontario compares with the rest of California
Ontario's 8.75% is above what most ZIP codes carry in California. Of the state's 2,584 ZIP codes with a figure, 373 land on the same one, 1,212 carry a lower figure and 999 a higher one. Across California the combined rate runs from 7.25% to 11.25%. See every city in California.
| Combined rate | ZIP codes | Which is this city |
|---|---|---|
| ~7.75% | 535 | |
| ~8.75% | 373 | Ontario |
| ~9.75% | 346 | |
| ~7.25% | 282 | |
| ~8.25% | 189 |
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.
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.