Alpine County is located in the Sierra Nevada, between Lake Tahoe and Yosemite National Park.
As of the census of 2000, there were 1,208 people, 483 households, and 295 families residing in the county. The population density was 2 people per square mile (1/km²). There were 1,514 housing units at an average density of 2 per square mile (1/km²). The racial makeup of the county was 73.68% White, 0.58% Black or African American, 18.87% Native American, 0.33% Asian, 0.08% Pacific Islander, 1.41% from other races, and 5.05% from two or more races. 7.78% of the population were Hispanic or Latino of any race. 12.1% were of German, 12.1% Irish, 9.3% English, 6.5% American and 5.7% Italian ancestry according to Census 2000. 95.0% spoke English, 3.1% Spanish and 2.0% Washo as their first language.
There were 483 households out of which 25.5% had children under the age of 18 living with them, 43.9% were married couples living together, 11.0% had a female householder with no husband present, and 38.9% were non-families. 27.7% of all households were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 2.96.
In the county the population was spread out with 22.8% under the age of 18, 10.40% from 18 to 24, 27.5% from 25 to 44, 29.3% from 45 to 64, and 9.9% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 110.8 males. For every 100 females age 18 and over, there were 117.2 males.
The median income for a household in the county was $41,875, and the median income for a family was $50,250. Males had a median income of $36,544 versus $25,800 for females. The per capita income for the county was $24,431. About 12.0% of families and 19.5% of the population were below the poverty line, including 27.4% of those under age 18 and 10.1% of those age 65 or over.
Almost half of the population in the county is Mormon.
There is limited, call ahead, public transportation provided by agreement with neighboring Douglas County, Nevada (There are a few trailhead shuttles, designed for hikers).
Alpine County Airport is a general aviation airport located in the Eastern Sierras about 4 miles from the town of Markleeville. The airport consists of a simple airstrip with an apron for small light aircraft to park. The airport has no buildings, no lights, and is very rarely used. The airport is popular with astronomers due to the clear, dark skies.