| ZIP Codes: | 16 ZIP Codes (8 Standard, 8 PO Box, 0 Unique) [See All] |
| Area Code: | 530 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:29 PM |
| Population: | 99,362 [See All] |
| FIPS: | 06057 |
| CBSA: | Truckee-Grass Valley, CA |
| Land Area: | 1,166 sq mi |
| Water Area: | 10 sq mi |
| Coordinates: | 39.2863, -120.7348 |
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99,362 residents live across 16 ZIPs covering 1,166 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 96,071 to 99,362 from 2014 to 2024 — a +3.4% change. 6 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 96161 (Truckee, $131,702 median) and poorest ZIP 95960 (North San Juan, $52,917) are 45.5 miles apart — a 2.5× income gap across local geography.
Median home values vary 2.2× across this county — from $441,700 in 95977 (Smartsville) to $991,400 in 96161 (Truckee).
Density varies 34× across the county — from 11 people/sq mi in 95960 (North San Juan) to 381 in 95945 (Grass Valley).
Educational attainment ranges from 22.2% bachelor's+ in 95977 (Smartsville) to 62.0% in 96161 (Truckee) — the breadth of educational profiles across the area.
Within California, this is the #36 most populous of 58 counties and ranks #30 for median household income .
Weighted by population, the typical household earns about $92,358 across the county — reflecting what a typical resident sees, not a simple ZIP average.
42.2% of adults age 25+ hold a bachelor's degree or higher (32,494 of 77,044 reporting).
8 Standard delivery, 8 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
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 |
|---|---|---|---|---|---|---|
| 95945 | Grass Valley | Standard | 27,470 | $65,989 | 72.1 | 8.9% |
| 95949 | Grass Valley | Standard | 20,552 | $98,181 | 136.7 | 4.6% |
| 96161 | Truckee | Standard | 19,634 | $131,702 | 253.2 | 6.3% |
| 95959 | Nevada City | Standard | 17,683 | $86,524 | 420.9 | 3.9% |
| 95946 | Penn Valley | Standard | 9,958 | $84,795 | 46.7 | -2.4% |
| 95977 | Smartsville | Standard | 1,780 | $104,545 | 33.5 | -5.7% |
| 95975 | Rough And Ready | Standard | 1,088 | $103,216 | 8.8 | -47.5% |
| 95960 | North San Juan | Standard | 540 | $52,917 | 48.2 | -44.6% |
| 95728 | Soda Springs | PO Box | 516 | $89,375 | 13.1 | 4.2% |
| 95986 | Washington | PO Box | 115 | — | 2.1 | 576.5% |
| 96111 | Floriston | PO Box | 26 | — | 43.1 | -62.3% |
| 95724 | Norden | PO Box | — | — | 87.2 | — |
| 96162 | Truckee | PO Box | — | — | 0.0 | — |
| 96160 | Truckee | PO Box | — | — | 0.0 | — |
| 95712 | Chicago Park | PO Box | — | — | 0.0 | — |
| 95924 | Cedar Ridge | PO Box | — | — | 0.0 | — |