| ZIP Codes: | 7 ZIP Codes (4 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 530 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 11:52:48 PM |
| Population: | 2,614 [See All] |
| FIPS: | 06091 |
| Land Area: | 820 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 39.5734, -120.5987 |
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2,614 residents live across 7 ZIPs covering 820 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 2,745 to 2,614 from 2014 to 2024 — a -4.8% change. 3 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 96124 (Calpine, $205,893 median) and poorest ZIP 96118 (Loyalton, $54,167) are 19.3 miles apart — a 3.8× income gap across local geography.
Median home values vary 1.9× across this county — from $243,800 in 96118 (Loyalton) to $467,900 in 96124 (Calpine).
Density varies 7× across the county — from 1 people/sq mi in 96125 (Sierra City) to 7 in 95944 (Goodyears Bar).
Educational attainment ranges from 0.5% bachelor's+ in 96126 (Sierraville) to 36.9% in 96125 (Sierra City) — the breadth of educational profiles across the area.
Within California, this is the #57 most populous of 58 counties and ranks #11 for median household income .
On the national stage, Sierra County is ranks #98 for income .
Weighted by population, the typical household earns about $89,355 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.4% of adults age 25+ hold a bachelor's degree or higher (479 of 1,964 reporting).
4 Standard delivery, 3 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 |
|---|---|---|---|---|---|---|
| 96118 | Loyalton | Standard | 1,328 | $54,167 | 232.0 | -16.5% |
| 96124 | Calpine | Standard | 387 | $205,893 | 83.3 | 5.7% |
| 96126 | Sierraville | PO Box | 351 | — | 146.2 | 163.9% |
| 96125 | Sierra City | Standard | 263 | $95,554 | 250.0 | -7.7% |
| 95936 | Downieville | PO Box | 144 | — | 59.6 | -41.0% |
| 95944 | Goodyears Bar | PO Box | 122 | — | 17.3 | 916.7% |
| 95910 | Alleghany | Standard | 19 | — | 31.8 | -83.5% |