San Joaquin County

administration
US state :	California
Administrative headquarters :	Stockton
Foundation :	1850
Demographics
Residents :	685,306 (2010)
Population density :	189.1 inhabitants / km ²
geography
Total area :	3694 km²
Water surface :	70 km²
map

Website : www.co.san-joaquin.ca.us

The San Joaquin County is a county in the US state of California . At the 2010 census , the county had 685,306 people and a population density of 189.1 people per square kilometer. The county seat is Stockton .

geography

The county is located in California's long valley , around 100 km east of the San Francisco Bay Area and has an area of 3694 km². It borders on the following counties:

	Sacramento County	Amador County
Contra Costa County , Alameda County		Calaveras County
Santa Clara County	Stanislaus County

history

The county was founded in 1850. The San Joaquin River , which flows through the county, gave it its name. On an expedition in the early years of the 19th century, Gabriel Moraga discovered the area we know today and named it San Joaquin after the Spanish name for Saint Joachim.

35 structures and sites in the county are on the National Register of Historic Places .

Demographic data

growth of population
Census	Residents	± in%
1850	3647	-
1860	9435	158.7%
1870	21,050	123.1%
1880	24,340	15.6%
1890	28,629	17.6%
1900	35,452	23.8%
1910	50,731	43.1%
1920	79.905	57.5%
1930	102,940	28.8%
1940	134.207	30.4%
1950	200,750	49.6%
1960	249,989	24.5%
1970	290.208	16.1%
1980	347,342	19.7%
1990	480,628	38.4%
2000	563,598	17.3%
2010	685.306	21.6%
Before 1900 1900–1990 2000 + 2010

San Joaquin County Age Pyramid

According to the 2000 census , San Joaquin County's population was 563,598. There were 181,629 households and 134,768 families. The population density was 156 inhabitants per square kilometer. The racial the population was composed of 58.13% White, 6.69% African American, 1.13% Native American, 11.41% Asian, 0.35% Pacific Islander, and 16.26% other races Groups; 6.05% were from two or more races. 30.53% of the population were Hispanic or Latino of any of the above mentioned groups.

Of the 181,629 households, 40.50% had children and young people under the age of 18 living with them. 54.30% were married couples living together, 14.00% were single mothers. 25.80% were not families. 20.70% were single households and 8.40% had someone who was 65 years of age or older. The average household size was 3.00 and the average family size was 3.48 people.

For the entire county, the population was composed of 31.00% residents under 18 years of age, 10.00% between 18 and 24 years of age, 28.80% between 25 and 44 years of age, 19.60% between 45 and 64 years of age 10.60% were 65 years of age or over. The median age was 32 years. For every 100 females there were statistically 99.90 males, for every 100 females aged 18 and over there were statistically 97.20 males.

The median income for a household in the county is $ 41,282 , and the median income for a family is $ 46,919. Males had a median income of $ 39,246 versus $ 27,507 for females. The per capita income was $ 17,365. 17.70% percent of the population and 13.50% of families are below the poverty line. 23.70% of these were under 18 years of age and 10.00% were 65 years of age or older.