How many zip codes are in Lake County California?

Lake County, California contains 15 zip codes.

What is the county seat of Lake County?

The county seat of Lake County, California is Clearlake.

What cities are in Lake County?

Lake County USPS city names in this directory include Clearlake, Kelseyville, Lakeport, Hidden Valley Lake, Middletown, Clearlake Oaks, Lucerne, Lower Lake and 6 more. The county seat is Clearlake.

What is the population of Lake County?

The population of Lake County, California is approximately 68,024.

What zip codes are in Lake County?

Lake County contains 15 zip codes: 14 standard delivery ZIPs and 1 PO Box or unique ZIPs. Browse the table on this page for the complete list.

Lake County, California Zip Codes

📍 Lake County has 15 zip codes with a population of 68,024.

County

Lake

County Seat

Clearlake

Zip Codes

Population

68,024

Lake County is located in California with a land area of 773 square miles. The county seat is Clearlake. Below you'll find all 15 zip codes in Lake County with population, income and home value, the county's affordability profile, and links to its 14 city pages.

Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).

All Lake County Zip Codes

ZIP Code	City	County	Population	Median Income	Median Home	Details
95422	Clearlake	Lake	16,998	$41,428	$186,000	View →
95423	Clearlake Oaks	Lake	3,322	$42,648	$270,300	View →
95424	Clearlake Park	PO Box ZIP	—	—	—	View →
95426	Cobb	Lake	1,178	$79,904	$313,900	View →
95435	Finley	Lake	347	—	—	View →
95443	Glenhaven	Lake	190	—	—	View →
95451	Kelseyville	Lake	12,957	$61,904	$305,700	View →
95453	Lakeport	Lake	11,254	$65,012	$347,500	View →
95457	Lower Lake	Lake	3,252	$42,721	$379,600	View →
95458	Lucerne	Lake	3,303	$46,244	$245,200	View →
95461	Middletown	Lake	3,909	$79,914	$400,900	View →
95464	Nice	Lake	2,466	$71,150	$146,300	View →
95467	Hidden Valley Lake	Lake	5,795	$82,660	$407,600	View →
95485	Upper Lake	Lake	2,909	$71,071	$411,200	View →
95493	Witter Springs	Lake	144	$68,875	$640,200	View →

Lake County at a Glance

Residents (ZIPs with data)

68,024

Median household income

$66,944

Median home value

$330,700

Price-to-income ratio

5.2

Median rent

$1,158

Owner-occupied

72%

Bachelor's degree+

21%

Poverty rate

15.3%

Lake County has 15 ZIP codes in this directory: 14 standard delivery ZIPs and 1 PO Box or unique ZIP that carries no resident population in Census data. The 12 ZIPs with published Census housing data cover 68,024 residents, the largest being 95422 (Clearlake) with 16,998 people.

The median ZIP in Lake County has a household income of $66,944 and a home value of $330,700, a price-to-income ratio of 5.2, below the 6.7 California ZIP median. Affordability ranges from 95464 in Nice at a ratio of 2.1 to 95493 in Witter Springs, where the median home is $640,200. The highest median income is in 95467 (Hidden Valley Lake) at $82,660. Median rent across these ZIPs is $1,158 a month.

72% of households in the typical Lake County ZIP own their home (statewide ZIP median 64%). 21% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 15.3%, above the 10.8% statewide ZIP median. Overall density is about 88 residents per square mile across 773 square miles of ZIP land area.

Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.