| ZIP Codes: | 20 ZIP Codes (12 Standard, 8 PO Box, 0 Unique) [See All] |
| Area Codes: | 209 / 350 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:27 PM |
| Population: | 46,119 [See All] |
| FIPS: | 06009 |
| Land Area: | 1,132 sq mi |
| Water Area: | 16 sq mi |
| Coordinates: | 38.2140, -120.5600 |
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46,119 residents live across 20 ZIPs covering 1,132 sq mi, served by 20 distinct USPS-recognized cities.
Population moved from 44,845 to 45,860 from 2014 to 2024 — a +2.3% change. 10 ZIPs gained residents, 8 lost.
The county's wealthiest ZIP 95251 (Vallecito, $127,775 median) and poorest ZIP 95249 (San Andreas, $45,302) are 12.8 miles apart — a 2.8× income gap across local geography.
Median home values vary 2.0× across this county — from $275,700 in 95255 (West Point) to $561,000 in 95251 (Vallecito).
Density varies 10× across the county — from 12 people/sq mi in 95223 (Arnold) to 125 in 95252 (Valley Springs).
Educational attainment ranges from 7.7% bachelor's+ in 95257 (Wilseyville) to 49.5% in 95223 (Arnold) — the breadth of educational profiles across the area.
Within California, this is the #44 most populous of 58 counties and ranks #34 for median household income .
Weighted by population, the typical household earns about $83,041 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.1% of adults age 25+ hold a bachelor's degree or higher (8,618 of 35,751 reporting).
12 Standard delivery, 8 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 |
|---|---|---|---|---|---|---|
| 95252 | Valley Springs | Standard | 14,252 | $89,651 | 114.2 | 0.8% |
| 95222 | Angels Camp | Standard | 5,597 | $70,930 | 160.8 | 7.1% |
| 95228 | Copperopolis | Standard | 4,611 | $107,899 | 97.5 | 0.8% |
| 95249 | San Andreas | Standard | 4,295 | $45,302 | 77.3 | 13.1% |
| 95247 | Murphys | Standard | 3,858 | $76,333 | 53.9 | -17.7% |
| 95223 | Arnold | Standard | 3,056 | $106,694 | 250.8 | 0.5% |
| 95245 | Mokelumne Hill | Standard | 2,727 | $84,405 | 71.8 | 32.1% |
| 95255 | West Point | Standard | 1,955 | $51,364 | 103.6 | -1.8% |
| 95246 | Mountain Ranch | Standard | 1,672 | $98,269 | 90.0 | 32.9% |
| 95225 | Burson | PO Box | 1,609 | — | 12.9 | 182.3% |
| 95251 | Vallecito | Standard | 701 | $127,775 | 12.0 | -19.8% |
| 95257 | Wilseyville | Standard | 569 | $71,437 | 32.1 | 47.8% |
| 95224 | Avery | PO Box | 316 | $46,815 | 7.3 | 18.8% |
| 95254 | Wallace | PO Box | 313 | — | 6.8 | -54.1% |
| 95221 | Altaville | PO Box | 259 | — | 0.0 | — |
| 95232 | Glencoe | Standard | 135 | $71,023 | 4.9 | -37.8% |
| 95233 | Hathaway Pines | PO Box | 134 | $50,972 | 0.0 | -77.3% |
| 95248 | Rail Road Flat | PO Box | 60 | — | 32.5 | -66.3% |
| 95226 | Campo Seco | PO Box | 0 | — | 3.6 | -100.0% |
| 95229 | Douglas Flat | PO Box | — | — | 0.0 | — |