Duncans Mills, CA is in zip code 95430. The current total local sales tax rate in Duncans Mills, CA is 8.500%. The 2020 total local sales tax rate was 8.250%.
| District | Rate |
|---|---|
| California State | 7.250% |
| Sonoma County | 1.250% |
| Duncans Mills | 0.000% |
| Total | 8.500% |