Southern California is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California. It includes the Los Angeles metropolitan area as well as the Inland Empire. The region generally contains ten of California's 58 counties: Imperial, Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, San Luis Obispo and Ventura counties.
Santa Ana is a city in and the county seat of Orange County, California, United States. Located in the Greater Los Angeles region of Southern California, the city's population was 310,227 at the 2020 census, making Santa Ana the second most populous city in Orange County, the 13th-most populous city in California, and the 64th densest large city in the United States. Santa Ana is a major regional economic and cultural hub for the Orange Coast.
Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States, with 9,861,224 residents estimated in 2022. Its population is greater than that of 40 individual U.S. states. Comprising 88 incorporated cities and many unincorporated areas within a total area of 4,083 square miles (10,570 km2), it is home to more than a quarter of Californians and is one of the most ethnically diverse U.S. counties. The county's seat, Los Angeles, is the second most populous city in the United States and the most populous city in California, with 3,822,238 residents estimated in 2022. It is also known for being the home of the American film and television industry, a distinction it has held since the early 20th century which has given the county global prominence.
Alameda County is a county located in the U.S. state of California. As of the 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and 21st most populous nationally. The county seat is Oakland. Alameda County is in the San Francisco Bay Area, occupying much of the East Bay region.
San Bernardino County, officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181,654, making it the fifth-most populous county in California and the 14th-most populous in the United States. The county seat is San Bernardino.
Ventura County is a county located in the southern part of the U.S. state of California. As of the 2020 census, the population was 843,843. The largest city is Oxnard, and the county seat is the city of Ventura.
Cerritos is a city in Los Angeles County, California, United States, and is one of several cities that constitute the Gateway Cities of southeast Los Angeles County. It was incorporated on April 24, 1956. As of 2019, the population was 49,859. It is part of the Los Angeles–Long Beach–Anaheim, California Metropolitan Statistical Area designated by the Office of Management and Budget.
The San Fernando Valley, known locally as the Valley, is an urbanized valley in Los Angeles County, California. Situated to the north of the Los Angeles Basin, it contains a large portion of the city of Los Angeles, as well as several unincorporated areas; and the incorporated cities of Burbank, Calabasas, Glendale, Hidden Hills, and San Fernando. The valley is well known for its film studios such as Warner Bros. Studios and Walt Disney Studios. In addition, it is home to the Universal Studios Hollywood theme park.
The San Diego County Sheriff's Department (SDSD), is the primary and largest law enforcement agency in San Diego County, California, and one of the largest sheriff's departments in the United States: with over 4,000 employees, an annual budget of over $960 million, and a service area over 4,500 square miles extending to a 60-mile international border. The department, established in 1850, has over 4,000 sworn deputies and additional civilian support personnel servicing an area of nearly 4,526 mi².
The Orange County Sheriff's Department (OCSD) is the law enforcement agency serving Orange County, California. It currently serves the unincorporated areas of Orange County and thirteen contract cities in the county: Aliso Viejo, Dana Point, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Mission Viejo, Rancho Santa Margarita, San Clemente, San Juan Capistrano, Stanton, Villa Park, and Yorba Linda.
Law enforcement in Los Angeles County is conducted by a variety of law enforcement agencies.
Police departments in the University of California system are charged with providing law enforcement to each of the system's campuses.
The Riverside County Sheriff's Department (RSD), also known as the Riverside Sheriff's Office (RSO), is a law enforcement agency in Riverside County, in the U.S. state of California. Overseen by an elected sheriff-coroner, the department serves unincorporated areas of Riverside County as well as some of the incorporated cities in the county by contract. 17 of the county's 26 cities, with populations ranging from 4,958 to 193,365, contract with the department for police services. The county hospital and one tribal community also contract with the department for proactive policing. Riverside County is home to 12 federally recognized Indian reservations. Absent proactive policing and traffic enforcement, the department is responsible for enforcing criminal law on all Native American tribal land within the county. This function is mandated by Public Law 280, enacted in 1953, which transferred the responsibility of criminal law enforcement on tribal land from the federal government to specified state governments including California. The department also operates the county's jail system.
Riverside County is a county located in the southern portion of the U.S. state of California. As of the 2020 census, the population was 2,418,185, making it the fourth-most populous county in California and the 10th-most populous in the United States. The name was derived from the city of Riverside, which is the county seat.
San Diego County, officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fifth-most populous in the United States. Its county seat is San Diego, the second-most populous city in California and the eighth-most populous city in the United States. It is the southwesternmost county in the 48 contiguous United States, and is a border county. It is also home to 18 Native American tribal reservations, the most of any county in the United States.
The government of California has an extensive system of local government that manages public functions throughout the state. Like most states, California is divided into counties, of which there are 58 covering the entire state. Most urbanized areas are incorporated as cities, though not all of California is within the boundaries of a city. School districts, which are independent of cities and counties, handle public education. Many other functions, especially in unincorporated areas, are handled by special districts, which include municipal utility districts, transit districts, health care districts, vector control districts, and geologic hazard abatement districts.
The Government of Los Angeles County is defined and authorized under the California Constitution, California law, and the Charter of the County of Los Angeles. Much of the Government of California is in practice the responsibility of county governments, such as the Government of Los Angeles County. The County government provides countywide services such as elections and voter registration, law enforcement, jails, vital records, property records, tax collection, public health, health care, and social services. In addition the County serves as the local government for all unincorporated areas.
