ZIP codes in Amador County
14 ZIPs touch Amador County, California. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
3
cross the county line
41,603
people in these ZIPs
58
counties in CA
Most people
Amador County ZIP list
More counties in California
- Alameda County73
- Alpine County4
- Butte County25
- Calaveras County22
- Colusa County9
- Contra Costa County59
- Del Norte County6
- El Dorado County32
Questions people actually ask
How many ZIP codes are in Amador County, California?
14 ZIP codes reach into Amador County, including 2 PO Box or single-address ZIPs placed by the town they serve. 3 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Amador County has the most people?
95640 (Ione) has about 13,926 residents, the most of any ZIP touching Amador County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Amador County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Amador County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from