| ZIP Codes: | 7 ZIP Codes (5 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 530 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:28 PM |
| Population: | 22,045 [See All] |
| FIPS: | 06011 |
| Land Area: | 1,148 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 39.1998, -122.1540 |
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22,045 residents live across 7 ZIPs covering 1,148 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 21,612 to 22,045 from 2014 to 2024 — a +2.0% change. 3 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 95987 (Williams, $95,122 median) and poorest ZIP 95979 (Stonyford, $24,766) are 18.3 miles apart — a 3.8× income gap across local geography.
Median home values vary 2.4× across this county — from $184,400 in 95979 (Stonyford) to $435,800 in 95912 (Arbuckle).
Density varies 8355× across the county — from 2 people/sq mi in 95979 (Stonyford) to 13,165 in 95950 (Grimes).
Educational attainment ranges from 5.6% bachelor's+ in 95950 (Grimes) to 19.2% in 95979 (Stonyford) — the breadth of educational profiles across the area.
Within California, this is the #50 most populous of 58 counties and ranks #46 for median household income .
Weighted by population, the typical household earns about $79,891 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.3% of adults age 25+ hold a bachelor's degree or higher (2,307 of 14,129 reporting).
5 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.8× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
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 |
|---|---|---|---|---|---|---|
| 95932 | Colusa | Standard | 7,701 | $66,964 | 143.3 | -1.4% |
| 95987 | Williams | Standard | 6,786 | $95,122 | 288.1 | 13.5% |
| 95912 | Arbuckle | Standard | 4,855 | $86,457 | 268.1 | 6.7% |
| 95955 | Maxwell | PO Box | 1,405 | — | 69.5 | 1.5% |
| 95979 | Stonyford | Standard | 558 | $24,766 | 354.1 | -18.5% |
| 95970 | Princeton | Standard | 453 | $69,000 | 25.2 | -6.0% |
| 95950 | Grimes | PO Box | 287 | — | 0.0 | -60.4% |