Contra Costa County, California
Contra Costa County is a county in California. It is located in the Bay Area of San Francisco. The administrative headquarters ( County Seat) is Martinez.
Geography
The county covers an area of 2078 km ².
History
Contra Costa County was one of the Gründungscountys California and was created in 1850. The original name was "Mount Diablo County ". Parts of the area were 1853 Alameda County.
The name of Contra Costa is Spanish and means " towards the coast ." Contra Costa County is located on the San Francisco opposite, eastern side of San Francisco Bay.
In the Port Chicago disaster on the southern coast of Suisun Bay on July 17, 1944 exploded the two vessels' EA Bryan "and" Quinault Victory " at the ammunition transfer. In the disaster 320 people died, including 202 African-American recruits. On August 9, 1944 three weeks after the disaster, the sailors refused to continue loading without proper training. The mutiny resulted in one of the largest military tribunals in U.S. history.
On May 7, 1964 fell Pacific Air Lines Flight 773 from near San Ramon, after a passenger had killed the cockpit crew and then the driverless machine crashed into a mountainside. The impact all 44 people were killed on board.
Demographic data
1900-1990 2000 2010
According to the census of 2000, there were 948 816 people in Contra Costa County. There were 344 129 households and 242 266 families. The population density was 509 people per square kilometer. The racial the population was composed of 65.50 % White, 9.36 % African American, 0.61 % Native American, 10.96 % Asian, 0.37 % Pacific Islander residents from the and 8.06% from other races groups; 5.13% were descended from two or more races. 17.68 % of the population were Hispanic or Latino of any race.
Of the 344 129 households out of which 35.40 % have children under the age of 18 living with them. 54.50 % were married couples living together, 11.50% had a female householder with no husband. 29.60% were non-families. 22.90 % of all households and 8.00% had someone living alone at the age of 65 years or older. The average household size was 2.72 and the average family size was 3.23 persons.
Based on the county the population was spread out with 26.50 % under the age of 18, 7.70 % from 18 to 24, 30.60 % from 25 to 44 years, 23.90 % between 45 and 64 years and 11.30% were 65 years old or older. The average age was 36 years. For every 100 females there were 95.40 males, 100 females age 18 and over, there were 92.20 males.
The median income for a household was $ 63,675, and the median income for a family was $ 73,039. Males had a median income of $ 52,670, women $ 38,630. The per capita income was $ 30,615. 7.60 % percent of the population and 5.40% of families are below the poverty line. 9.80 % of those under age 18 and 6.00% were 65 years or older.
Cities in Contra Costa County
- Alamo
- Antioch
- Bay Point
- Bayview - Montalvin
- Bethel Iceland
- Blackhawk - Camino Tassajara
- Brentwood
- Byron
- Canyon
- Clayton
- Clyde
- Concord
- Crockett
- Danville
- Diablo
- Discovery Bay
- East Richmond Heights
- El Cerrito
- El Sobrante
- Hercules
- Kensington
- Knightsen
- Lafayette
- Martinez
- Moraga
- Mountain View
- Oakley
- Orinda
- Pacheco
- Pinole
- Pittsburg
- Pleasant Hill
- Port Costa
- Richmond
- Rodeo
- Rollingwood
- San Pablo
- San Ramon
- Tara Hills
- Vine Hill
- Waldon
- Walnut Creek