Contra Costa County

from Wikipedia, the free encyclopedia
Contra Costa County Courthouse, listed in NRHP No. 89002113 [1]
Contra Costa County Courthouse, listed on NRHP No. 89002113
administration
US state : California
Administrative headquarters : Martinez
Foundation : 1850
Demographics
Residents : 1,049,025  (2010)
Population density : 555.6 inhabitants / km 2
geography
Total area : 2078 km²
Water surface : 190 km²
map
Map of Contra Costa County within California
Website : www.co.contra-costa.ca.us

Contra Costa County is a county in California . It is located in the San Francisco Bay area . The county seat is Martinez .

geography

The county covers an area of ​​2078 km² .

history

Contra Costa County was one of the founding counties of California and was created in 1850. The original name was " Mount Diablo County". Parts of the area went to Alameda County in 1853 .

The name Contra Costa is Spanish and means "opposite the coast". Contra Costa County is 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, the two transport ships "EA Bryan" and "Quinault Victory" exploded while taking over ammunition. 320 people died in the accident, including 202 African American recruits . On August 9, 1944, three weeks after the catastrophe, the sailors refused to continue the loading without prior professional training. In one of the largest military tribunals in US history, 50 sailors were convicted of mutiny, which later sparked a judicial scandal.

On May 7, 1964, Pacific Air Lines Flight 773 crashed near San Ramon after a passenger killed the cockpit crew and the driverless machine crashed into a mountainside. All 44 people on board were killed in the impact.

There are two National Historic Landmarks in Contra Costa County , the John Muir National Historic Site and the Tao House . 43 other structures and sites in the county are on the National Register of Historic Places .

Demographic data

growth of population
Census Residents ± in%
1860 5328 -
1870 8461 58.8%
1880 12,525 48%
1890 13,515 7.9%
1900 18,046 33.5%
1910 31,674 75.5%
1920 53,889 70.1%
1930 78,608 45.9%
1940 100,450 27.8%
1950 298,984 197.6%
1960 409.030 36.8%
1970 558.389 36.5%
1980 656.380 17.5%
1990 803.732 22.4%
2000 948.816 18.1%
2010 1,049,025 10.6%
Before 1900

1900–1990 2000 + 2010

The Carquinez Street with the Carquinez Bridge at the confluence of the Sacramento River with the San Joaquin River
The Suisun Bay with the Benicia – Martinez Bridge
Age pyramid of the Contra Costa County

According to the 2000 census , the Contra Costa County had 948,816 people. There were 344,129 households and 242,266 families. The population density was 509 inhabitants 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, and 8.06% other races Groups; 5.13% were from two or more races. Hispanic or Latino of any race was 17.68% of the population.

Of the 344,129 households, 35.40% had children and young people under the age of 18 living with them. 54.50% were married couples living together, 11.50% were single mothers. 29.60% were not families. 22.90% are single households and 8.00% have someone who is 65 years of age or older. The average household size was 2.72 and the average family size was 3.23.

For the entire county, the population was composed of 26.50% residents under 18 years of age, 7.70% between 18 and 24 years of age, 30.60% between 25 and 44 years of age, and 23.90% between 45 and 64 years of age 11.30% were 65 years of age or over. The median age was 36 years. For every 100 females there were 95.40 males, and for every 100 females aged 18 and over there were 92.20 males.

The median income for a household in the county is $ 63,675 , and the median income for a family is $ 73,039. Males had a median income of $ 52,670 versus $ 38,630 for females. 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 them were under 18 years of age and 6.00% were 65 years of age or older.

Places in Contra Costa County

Cities

Towns

Census-designated places

Unincorporated communities

Overview - Mount Diablo and portions of Concord, Pleasant Hill and Walnut Creek

Individual evidence

  1. ^ Extract from the National Register of Historic Places . Retrieved March 13, 2011
  2. ↑ GNIS-ID: 1675903. Retrieved on February 22, 2011 (English).
  3. ↑ US Navy: Naval History and Heritage Command - Port Chicago Naval Magazine Explosion, 1944 (English, with links to online documents)
  4. ↑ Search mask database in the National Register Information System. National Park Service , accessed August 26, 2017.
  5. ↑ US Census Bureau - Census of Population and Housing . Retrieved March 15, 2011
  6. ↑ Extract from Census.gov . Retrieved February 28, 2011
  7. ↑ Extract from census.gov (2000 + 2010). Accessed April 2, 2012

Web links

Commons : Contra Costa County  - Collection of pictures, videos, and audio files

Coordinates: 37 ° 56 ′  N , 121 ° 57 ′  W