San Bernardino County

San Bernardino County
Name	San Bernardino County
Settlement type	County
Subdivision type	Country
Subdivision name	United States
Subdivision type1	State
Subdivision name1	California
Seat	San Bernardino
Largest city	San Bernardino
Area total sq mi	2060
Area land sq mi	2000
Population total	2221014
Population as of	2020

San Bernardino County is a vast administrative region in Southern California spanning urban centers, mountain ranges, and desert basins. The county contains a mix of incorporated cities and unincorporated communities, hosting a range of industries, cultural institutions, and federal lands. Its landscape and infrastructure connect to statewide and national corridors, making it a focal point for transportation and regional planning.

History

The county's indigenous precontact period involved peoples such as the Serrano people, Cahuilla, and Mojave people, who occupied areas around what became the Mojave Desert and San Bernardino Mountains. Spanish exploration tied the region to expeditions including those of Gaspar de Portolá and Juan Bautista de Anza, and missions like Mission San Gabriel Arcángel influenced settlement patterns. Following Mexican independence and the Mexican–American War, the area entered United States jurisdiction and was shaped by land grants such as those to families like the Yorba family and Rancho Cucamonga owners. The California Gold Rush and rail expansion—driven by companies like the Southern Pacific Railroad and the California Southern Railroad—accelerated growth, while events such as the establishment of Fort Irwin and the Camp Cady outpost reflected frontier military presence. Twentieth-century developments included the founding of municipalities like San Bernardino, California and Rialto, California, growth tied to manufacturers such as Lockheed Corporation, and transportation projects including the Interstate 10 corridor. Natural disasters such as the 1906 San Francisco earthquake echoed statewide; local seismicity involved faults like the San Andreas Fault and Garlock Fault. Twentieth-century civic and cultural institutions—San Bernardino County Museum, California State University, San Bernardino, and Loma Linda University—shaped education and research.

Geography and Climate

The county spans portions of the Inland Empire, Mojave Desert, Coachella Valley, and the Transverse Ranges, including the San Bernardino Mountains and peaks such as San Gorgonio Mountain. Federal lands include parts of the Mojave National Preserve, Angeles National Forest, and sections of Joshua Tree National Park adjacent to county borders. Major waterways include the Santa Ana River and ephemeral basins feeding the Colorado River watershed via the Salton Sea vicinity. Climate zones range from Mediterranean conditions in western valleys to alpine climates at high elevations and arid desert climates in the east, influenced by atmospheric patterns such as the Pacific High and seasonal effects from the Santa Ana winds. Elevation extremes produce biodiversity across habitats recognized by agencies like the U.S. Fish and Wildlife Service and conservation efforts by groups such as the California Native Plant Society.

Demographics

Population centers include cities such as Ontario, California, Fontana, California, Victorville, California, Hesperia, California, and Rancho Cucamonga. The county hosts diverse communities with ancestries tracing to Mexico, China, Philippines, Vietnam, India, El Salvador, Guatemala, and Iran, among others, and faith communities connected to institutions like Loma Linda University Medical Center and congregations of The Church of Jesus Christ of Latter-day Saints. Socioeconomic indicators are tracked by agencies such as the United States Census Bureau and regional councils like the Southern California Association of Governments. Cultural organizations such as the California Theatre of the Performing Arts in San Bernardino and festivals like events at Cal State San Bernardino reflect demographic variety. Median household statistics, age distributions, and migration patterns interact with housing markets influenced by developments from firms like D.R. Horton and KB Home.

Economy

Economic activity includes logistics hubs at Ontario International Airport and freight operations along the Union Pacific Railroad and BNSF Railway mainlines. The county's industrial base comprises warehousing for corporations such as Amazon (company), manufacturing historically linked to General Motors and Garrett AiResearch, and defense contracting tied to Edwards Air Force Base and Naval Air Weapons Station China Lake through regional supply chains. Agriculture persists in western valleys producing citrus and grapes sold through channels like the California Avocado Commission and vineyards supplying the San Joaquin Valley market. Tourism centers include Big Bear Lake, Snow Summit, and access points to Mojave Desert attractions, supported by hospitality brands like Marriott International and Hilton Worldwide Holdings. Economic planning involves entities such as the Inland Empire Economic Partnership and finance services provided by banks like Wells Fargo and Bank of America.

Government and Politics

County administration operates from chambers in San Bernardino, California and interacts with state offices such as the California State Legislature and federal representation in the United States House of Representatives. Law enforcement includes the San Bernardino County Sheriff's Department and prosecution by offices analogous to county district attorneys; regional public safety coordination involves agencies such as the Federal Emergency Management Agency and California Office of Emergency Services. Political dynamics have featured contests between parties like the Democratic Party (United States) and the Republican Party (United States), with voting patterns tracked by organizations like the Los Angeles Times and Pew Research Center. Inter-jurisdictional cooperation occurs through metropolitan planning organizations such as the San Bernardino Council of Governments.

Transportation

Major highways include Interstate 10, Interstate 15, Interstate 215, State Route 60, and State Route 18, forming corridors for passenger and freight movement. Airports include Ontario International Airport and general aviation fields like Apple Valley Airport; past military airfields such as George Air Force Base impacted regional aviation history. Rail services include commuter operations by Metrolink (California), freight by BNSF Railway and Union Pacific Railroad, and intercity connections via Amtrak. Public transit agencies include the Omnitrans and Victor Valley Transit Authority, while interstate bus carriers like Greyhound Lines and private shuttle services link to hubs such as Los Angeles International Airport and Las Vegas McCarran International Airport. Infrastructure projects have involved federal funding from programs administered by the United States Department of Transportation and grants overseen by the Federal Transit Administration.

Education and Health Care

Higher education institutions include California State University, San Bernardino, the health sciences campus of Loma Linda University, and community colleges such as San Bernardino Valley College and Victor Valley College. K–12 districts include San Bernardino City Unified School District, Fontana Unified School District, and Rialto Unified School District, with oversight from the California Department of Education. Health care systems include Loma Linda University Health, community hospitals such as Arrowhead Regional Medical Center, and networks like Kaiser Permanente serving regional residents. Public health programs coordinate with the Centers for Disease Control and Prevention and county public health offices to address issues such as wildfire smoke, drought impacts, and infectious disease preparedness.

Category:Counties in California