| ZIP Codes: | 15 ZIP Codes (12 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 369 / 707 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:28 PM |
| Population: | 68,152 [See All] |
| FIPS: | 06033 |
| CBSA: | Clearlake, CA |
| Land Area: | 1,010 sq mi |
| Water Area: | 42 sq mi |
| Coordinates: | 38.9955, -122.7444 |
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68,152 residents live across 15 ZIPs covering 1,010 sq mi, served by 15 distinct USPS-recognized cities.
Population moved from 64,209 to 68,152 from 2014 to 2024 — a +6.1% change. 9 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 95485 (Upper Lake, $104,667 median) and poorest ZIP 95423 (Clearlake Oaks, $41,143) are 17.8 miles apart — a 2.5× income gap across local geography.
Median home values vary 3.2× across this county — from $155,100 in 95464 (Nice) to $488,800 in 95457 (Lower Lake).
Density varies 45× across the county — from 16 people/sq mi in 95423 (Clearlake Oaks) to 723 in 95467 (Hidden Valley Lake).
Educational attainment ranges from 6.4% bachelor's+ in 95458 (Lucerne) to 33.6% in 95426 (Cobb) — the breadth of educational profiles across the area.
Within California, this is the #40 most populous of 58 counties and ranks #45 for median household income with the #16 fastest decade growth .
Weighted by population, the typical household earns about $62,733 across the county — reflecting what a typical resident sees, not a simple ZIP average.
17.8% of adults age 25+ hold a bachelor's degree or higher (8,716 of 48,884 reporting).
12 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 |
|---|---|---|---|---|---|---|
| 95422 | Clearlake | Standard | 17,054 | $42,241 | 35.5 | 10.4% |
| 95451 | Kelseyville | Standard | 12,592 | $62,568 | 108.9 | 4.6% |
| 95453 | Lakeport | Standard | 11,741 | $71,419 | 132.8 | 13.5% |
| 95467 | Hidden Valley Lake | Standard | 5,778 | $84,152 | 8.0 | -6.3% |
| 95458 | Lucerne | Standard | 3,638 | $57,674 | 24.7 | 9.1% |
| 95423 | Clearlake Oaks | Standard | 3,513 | $41,143 | 220.5 | 15.6% |
| 95461 | Middletown | Standard | 3,422 | $78,667 | 141.5 | 3.1% |
| 95485 | Upper Lake | Standard | 3,242 | $104,667 | 139.7 | 29.3% |
| 95457 | Lower Lake | Standard | 3,122 | $63,594 | 158.6 | -6.3% |
| 95464 | Nice | Standard | 2,484 | $61,705 | 15.2 | 12.5% |
| 95426 | Cobb | PO Box | 1,257 | $84,000 | 9.4 | -24.2% |
| 95493 | Witter Springs | Standard | 228 | $74,531 | 12.9 | 21.9% |
| 95443 | Glenhaven | Standard | 81 | — | 2.5 | -69.8% |
| 95435 | Finley | PO Box | 0 | — | 0.0 | -100.0% |
| 95424 | Clearlake Park | PO Box | — | — | 0.0 | — |