| ZIP Codes: | 13 ZIP Codes (8 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 209 / 279 / 350 / 916 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:27 PM |
| Population: | 41,385 [See All] |
| FIPS: | 06005 |
| Land Area: | 678 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 38.4397, -120.7243 |
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41,385 residents live across 13 ZIPs covering 678 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 37,173 to 41,385 from 2014 to 2024 — a +11.3% change. 7 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 95689 (Volcano, $122,936 median) and poorest ZIP 95642 (Jackson, $81,438) are 11.4 miles apart — a 1.5× income gap across local geography.
Median home values vary 2.0× across this county — from $316,700 in 95675 (River Pines) to $618,900 in 95629 (Fiddletown).
Density varies 725× across the county — from 18 people/sq mi in 95629 (Fiddletown) to 13,216 in 95675 (River Pines).
Educational attainment ranges from 16.5% bachelor's+ in 95640 (Ione) to 39.3% in 95629 (Fiddletown) — the breadth of educational profiles across the area.
Within California, this is the #46 most populous of 58 counties and ranks #17 for median household income with the #7 fastest decade growth .
Weighted by population, the typical household earns about $90,808 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.3% of adults age 25+ hold a bachelor's degree or higher (7,317 of 32,832 reporting).
8 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 95640 | Ione | Standard | 13,926 | $97,000 | 149.1 | 30.4% |
| 95642 | Jackson | Standard | 7,135 | $81,438 | 61.1 | 7.8% |
| 95666 | Pioneer | Standard | 5,994 | $84,311 | 252.7 | 8.3% |
| 95685 | Sutter Creek | Standard | 4,690 | $83,878 | 37.3 | 9.6% |
| 95665 | Pine Grove | Standard | 4,465 | $87,366 | 18.3 | -8.2% |
| 95669 | Plymouth | Standard | 2,118 | $89,609 | 78.0 | -20.9% |
| 95689 | Volcano | Standard | 1,429 | $122,936 | 31.0 | 58.1% |
| 95629 | Fiddletown | Standard | 813 | $90,469 | 44.6 | -18.9% |
| 95675 | River Pines | PO Box | 374 | — | 0.0 | 21.0% |
| 95601 | Amador City | PO Box | 294 | $94,023 | 3.0 | 82.6% |
| 95699 | Drytown | PO Box | 147 | $250,001 | 2.6 | -0.7% |
| 95644 | Kit Carson | PO Box | — | — | 0.0 | — |
| 95654 | Martell | PO Box | — | — | 0.0 | — |