County Maps US

Alpine County, California

The least populous of California's 58 counties.

CountyFIPS 06003

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

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Population
1,043
-137 (-11.6%) since 2020
Land area
738.3
square miles. A further 0.7% of the total area is water
Population density
1.4
people per square mile, computed rather than published
County seat
Markleeville
Seat of county government.
Established
1864
161 years ago
Largest city
Not available
No incorporated place lies within this county.

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 Alpine 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 Alpine 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 574 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 Alpine 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
Population1,04358th of 583,107th of 3,144
Land area738.3 sq mi49th of 581,197th of 3,144
Population density1.4 per sq mi58th of 583,034th of 3,144
Median household income$105,52115th of 58121st of 3,143

Full data for Alpine County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population1,043Vintage 2025 Population Estimates
Population in 20201,180Vintage 2025 Population Estimates
2020 estimates base?1,178Vintage 2025 Population Estimates
Land area738.3 sq mi2025 Gazetteer Files
Water area4.8 sq mi2025 Gazetteer Files
Total area743.2 sq mi2025 Gazetteer Files
Population density?1.4 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$105,521American Community Survey 2020-2024 5-Year Estimates
Median home value$590,200American Community Survey 2020-2024 5-Year Estimates
Median age39.8American Community Survey 2020-2024 5-Year Estimates
Households435American Community Survey 2020-2024 5-Year Estimates
Housing units1,558American 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
-11
3 births, 14 deaths
Net migration
-32
More people moved out than moved in.

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

The 6 areas bordering Alpine 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
Mono CountyCalifornia37 mi12,505
Tuolumne CountyCalifornia28 mi53,160
El Dorado CountyCalifornia23 mi192,323
Douglas CountyNevada23 mi50,111
Amador CountyCalifornia13 mi41,876
Calaveras CountyCalifornia8.0 mi46,605

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.