", "Dave Leip's Atlas of U.S. Presidential Elections", Crime in the United States, 2012, Table 8 (California), "The Martinez Adobe - John Muir National Historic Site - John Muir Exhibit (John Muir Education Project, Sierra Club California)", Contra Costa County Office of Education - ROP, ContraCostaMeansBusiness.com - Contra Costa County's Business Portal, Contra Costa Countywide Youth Commission (CYC), https://en.wikipedia.org/w/index.php?title=Contra_Costa_County,_California&oldid=983597967, Articles with dead external links from September 2012, Articles containing Spanish-language text, Pages using infobox settlement with unknown parameters, Pages using infobox settlement with no coordinates, Articles with unsourced statements from July 2019, Articles with unsourced statements from November 2016, Wikipedia articles in need of updating from May 2015, All Wikipedia articles in need of updating, Wikipedia articles with MusicBrainz area identifiers, Wikipedia articles with WORLDCATID identifiers, Creative Commons Attribution-ShareAlike License, Native Hawaiian and Other Pacific Islander alone, Two ranchos, both called Rancho San Ramon, were granted by the Mexican government in the San Ramon Valley. In 1903 the first tunnel through the Oakland hills (now Old Tunnel Road) was built, principally as a means of bringing hay by horse, mule, or ox-drawn wagons from central and eastern agricultural areas to feed the draft animals that provided the power to public and private transportation in the East Bay at the time. [7] Contra Costa County is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area. There were 255,560 people (24.4%) of Hispanic or Latino ancestry, of any race; 17.1% of Contra Costa County's population was of Mexican ancestry, while 1.9% was of Salvadoran heritage.[29]. The housing stock in the region was extensively developed after the great San Francisco earthquake of 1906. The population density was 1,318 people per square mile (509/km2). These Diablo public lands stretch southeast and include the Concord Naval Weapons Station, Shell Ridge Open Space and Lime Ridge Open Spaces near Walnut Creek, to the State Park, and east to the Los Vaqueros Reservoir watershed and four surrounding East Bay Regional Park District preserves, including Morgan Territory Regional Preserve, Brushy Peak Regional Preserve, Vasco Caves Regional Preserve, and Round Valley Regional Preserves. Rough surveying was based on a map, or diseño, measured by streams, shorelines, and/or horseman who marked it with rope and stakes. %%EOF American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B03003. According to the county, in the past 14-days, the cases per 100,000 showed that San Pablo had the most cases (522.1), however, Byron (377.4) was second with 5 cases followed by Discovery Bay (374.5) with 50 cases. endstream endobj 4709 0 obj <. U.S. Census Bureau. Orchards dominated where such water was available, while other, seasonally dry areas were used for cattle ranching. The median income of a family in the two relatively affluent East County towns of Brentwood and Discovery Bay is approaching $100k/yr. Contra Costa Health Services today issued an order to close, effective Tuesday, Nov. 17 at 8 a.m.: Dine-in restaurant and gyms reopened at reduced capacities when the county entered the state’s red tier in late September. But recent increases in COVID cases and hospitalizations make the closures necessary to help contain spread of the virus. 4708 0 obj <> endobj The new Marsh Creek State Park (California), formerly known as Cowell Ranch State Park, and Black Diamond Mines Regional Preserve, are among the open spaces stretching back to the north. North Central County, including of the cities of Walnut Creek, Pleasant Hill, Concord, Clayton, and Martinez, as well as the unincorporated areas of areas of Pacheco, Vine Hill, Clyde, the Pleasant Hill BART station, and Saranap. 70,166. By 2005, 53.2% of Contra Costa County's population were non-Hispanic whites. [8], The smallest unit was one square league, or about seven square miles, or 4,400 acres (17.8 km2), maximum to one individual was eleven leagues, or 48,400 acres (195.9 km2), including no more than 4,428 acres (17.9 km2) of irrigable land. Contra Costa County (estimated at about 2,000 residents) and Santa Clara County (estimated at about 4,000 residents) 1850 records were "lost" and also not included. [note 1], The exclusive land ownership in California by the approximate 9,000[9] Hispanics in California would soon end. Unlike the nomadic Native American of the Great Plains it appears that these tribes did not incorporate warfare into their culture but were instead generally cooperative. Map Contra Costa County, California California Chart View Selected Locations Contra Costa County, California California Dashboard Contra Costa County, California California More. Working together, we spark imagination, fuel . Most of what is known culturally comes from preserved contemporaneous and excavated artifacts and from inter-generational knowledge passed down through northerly outlying tribes of the larger region. Highway 4 is currently undergoing multimillion-dollar improvements that are scheduled to add lanes through Brentwood, Antioch and Pittsburg by 2015 to reduce the driving time between East County and Concord/Walnut Creek. Ohmer was a rail station located on the Oakland, Antioch and Eastern Railroad 6 miles (10 km) east of Martinez, which still appeared on maps as of 1947. Diners at restaurants remove their masks to eat or drink, as do movie patrons when snacking on food from concession stands. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B02001. Much of the housing stock in these areas is becoming quite expensive. U.S. 1850 California Census asks state of birth of all residents and gets about 7300 residents born in California. Most of these are no longer present, either failing, being absorbed into larger corporations, or outgrowing their original location and moving elsewhere in the Bay Area. Layers of volcanic ash ejected from geologically recent but now extinct volcanoes, compacted and now tilted by compressive forces, may be seen at the site of some road excavations. On Nov. 11, 50 people with COVID were hospitalized in the county – the highest number since September. MDSP was the first of twenty-nine Diablo area parks and preserves created around the peaks, today totaling more than 89,000 acres (360 km2). Reagan", after the former California Governor. By 1850 the Mission Indian populations had largely succumbed to disease and abuse and only numbered a few thousand. QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more. Adding the approximate 200 Hispanics known to be in San Francisco (1846 directory) and an unknown (but small as shown in 1852 CA Census recount) number in Contra Costa and Santa Clara county whose census was lost gives less than 9,000 Hispanics state wide. placing them in the top fifteen percent of affluent towns in the United States. Thus, Sonoma County is an adjacent county. The most notable natural landmark in the county is 3,849 feet (1,173 m) Mount Diablo, at the northerly end of the Diablo Range. Contra Costa County, California; California. In the United States House of Representatives, Contra Costa County is split between four congressional districts:[37]. Please update this article to reflect recent events or newly available information. The average household size was 2.72 and the average family size was 3.23. As of the census[31] of 2000, there were 948,816 people, 344,129 households, and 242,266 families residing in the county. With transmission and hospitalizations on the rise, health officers representing counties across the Bay Area are tightening local rules for high-risk indoor activities where the virus can spread more easily. According to the Contra Costa Times, in 2011, there were rumors that Contra Costa County was going to rename the Mountain, "Mt. In the northern part of the county, significant coal and sand deposits were formed in even earlier geologic eras. A number of large companies followed their employees to the suburbs, filling large business parks. CSV. Contra Costa County is located in the state of California in the United States. Contra Costa County is broadly divided into three sub-areas:[17]. Owing to the high quality of its public schools (due largely to both demographics and added support from prosperous parents), this area has become a magnet for well–off families with children. While little changed in ranchero life, the Mexican War of Independence resulted in the secularization of the missions with the re-distribution of their lands, and a new system of land grants under the Mexican Federal Law of 1824. As an alternative to moving to either the expensive central county, or the too-distant East County, this area is becoming gentrified, with a mix of races and income levels — a character actively sought by some housing purchasers. %PDF-1.5 %���� The towns east of the hills, on or near Highway 24 and their surrounding areas (Lafayette, Moraga and Orinda) are collectively known as Lamorinda. Diablo County, but the name was changed prior to incorporation as a county. CCCOE Fingertip Facts 2019-20 K-12 ENROLLMENT BY DISTRICT (the following figures include Charter Schools) ... Contra Costa County has the 11th largest student population among California's 58 counties.