County Maps US

Lake County, California

A county in California, ranked 41 of 58 by population.

CountyFIPS 06033

Within California
Lake County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Lakeport, the county seat, located via the 2025 Census Gazetteer.

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Population
67,772
-436 (-0.6%) since 2020
Land area
1,255
square miles. A further 5.5% of the total area is water
Population density
54.0
people per square mile, computed rather than published
County seat
Lakeport
Seat of county government.
Established
1861
164 years ago
Largest city
Clearlake city
Population 16,893.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Lake County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Lake County, California from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 545 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Lake County ranks

Position among the 58 counties of California, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn CaliforniaNationally
Population67,77241st of 58809th of 3,144
Land area1,255 sq mi38th of 58484th of 3,144
Population density54.0 per sq mi37th of 581,397th of 3,144
Median household income$60,62154th of 582,031st of 3,143

Full data for Lake County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population67,772Vintage 2025 Population Estimates
Population in 202068,208Vintage 2025 Population Estimates
2020 estimates base?68,162Vintage 2025 Population Estimates
Land area1,255 sq mi2025 Gazetteer Files
Water area73.0 sq mi2025 Gazetteer Files
Total area1,328 sq mi2025 Gazetteer Files
Population density?54.0 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$60,621American Community Survey 2020-2024 5-Year Estimates
Median home value$324,300American Community Survey 2020-2024 5-Year Estimates
Median age44.1American Community Survey 2020-2024 5-Year Estimates
Households26,940American Community Survey 2020-2024 5-Year Estimates
Housing units34,400American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-348
600 births, 948 deaths
Net migration
+241
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Lake County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Mendocino CountyCalifornia86 mi88,122
Colusa CountyCalifornia63 mi21,836
Napa CountyCalifornia25 mi132,949
Glenn CountyCalifornia22 mi28,141
Sonoma CountyCalifornia21 mi486,444
Yolo CountyCalifornia9.1 mi224,410

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 58 counties of California

Open the interactive California county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.