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Duncans Mills, CA ZIP code

The ZIP code for Duncans Mills, California is 95430. It is in Sonoma County.

Population in these ZIPs
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Avg. median income
—population-weighted
Typical home value
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Duncans Mills, CA ZIP code list

Duncans Mills, CA ZIP codes
ZIP codePopulationMedian incomeTypical home value
954300——

Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology

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Frequently asked questions

What is the ZIP code for Duncans Mills, CA?

The ZIP code for Duncans Mills, CA is 95430.

What county is Duncans Mills, California in?

Duncans Mills ZIP codes are in Sonoma County.