Located in the southeast of the state of California, the thinly populated deserts and mountains of this vast county stretch from the outskirts of the densely populated Riverside-San Bernardino Area to the Nevada border and the Colorado River.
The county seat is San Bernardino. The county is considered to be part of the Inland Empire region and is also the only county in the Golden State bordered by both Nevada and Arizona.
As of the census of 2000, there were 1,709,434 people, 528,594 households, and 404,374 families residing in the county. The population density was 85 people per square mile (33/km²). There were 601,369 housing units at an average density of 30 per square mile (12/km²). The racial makeup of the county was 58.91% White, 9.09% African American, 1.17% Native American, 4.69% Asian, 0.30% Pacific Islander, 20.82% from other races, and 5.03% from two or more races. 39.16% of the population were Hispanic or Latino of any race. 8.3% were of German, 5.5% English and 5.1% Irish ancestry according to Census 2000. 66.1% spoke English, 27.7% Spanish and 1.1% Tagalog as their first language.
There were 528,594 households out of which 43.70% had children under the age of 18 living with them, 55.80% were married couples living together, 14.80% had a female householder with no husband present, and 23.50% were non-families. 18.40% of all households were made up of individuals and 6.60% had someone living alone who was 65 years of age or older. The average household size was 3.15 and the average family size was 3.58.
The number of homeless in San Bernardino County grew from 5,270 in 2002 to 7,331 in 2007, a 39% increase.
In the county the population was spread out with 32.30% under the age of 18, 10.30% from 18 to 24, 30.20% from 25 to 44, 18.70% from 45 to 64, and 8.60% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 99.60 males. For every 100 females age 18 and over, there were 97.20 males.
The median income for a household in the county was $42,066, and the median income for a family was $46,574. Males had a median income of $37,025 versus $27,993 for females. The per capita income for the county was $16,856. About 12.60% of families and 15.80% of the population were below the poverty line, including 20.60% of those under age 18 and 8.40% of those age 65 or over.
The total can be greater than 100% because Hispanics could be counted in other races.