List of law enforcement agencies in California

State agencies

• California Department of Justice
  • Division of Law Enforcement
    • California Bureau of Investigation
    • California Bureau of Firearms
    • California Bureau of Forensic Services
    • California Bureau of Gambling Control
  • Division of Medi-Cal Fraud & Elder Abuse
• California Department of Corrections and Rehabilitation
• Business, Consumer Services and Housing Agency
  • California Department of Alcoholic Beverage Control
  • California Department of Consumer Affairs Division of Investigation
• California Resources Agency
  • California Department of Fish and Wildlife
• California Natural Resources Agency
  • California State Parks Peace Officers
• California Environmental Protection Agency
  • California Department of Toxic Substances Control
• California State Transportation Agency
  • California Department of Motor Vehicles Investigations Division
  • California Highway Patrol
• California Department of Insurance Fraud Division
• California Government Operations Agency
  • California Franchise Tax Board Criminal Investigations Bureau (CFTB-CIB)
• California Lottery Security Law Enforcement Division
• California Health and Human Services Agency
  • California Department of Health Care Services
  • California Department of Public Health
  • California Department of State Hospitals Law Enforcement Office of Protective Services (California Department of State Hospitals Police)
  • California Department of Developmental Services Office of Protective Services
• California Labor and Workforce Development Agency
  • California Employment Development Department Investigation Division

County agencies

• Alameda County Sheriff's Office
• Alameda County Probation Department
• Alpine County Sheriff's Office
• Amador County Sheriff's Office
• Butte County Sheriff's Department
• Calaveras County Sheriff's Department
• Colusa County Sheriff's Office
• Contra Costa County Sheriff's Office
• Del Norte County Sheriff's Office
• El Dorado County Sheriff's Office
• Fresno County Sheriff's Office
• Glenn County Sheriff's Office
• Humboldt County Sheriff's Office
• Imperial County Sheriff's Office
• Inyo County Sheriff's Office
• Kern County Sheriff's Office
• Kern County Probation Department
• Kern County Parks and Recreation Park Rangers
• Kings County Sheriff's Office
• Lake County Sheriff's Department
• Lassen County Sheriff's Office
• Los Angeles County Sheriff's Department (LASD)
• Los Angeles County Probation Department
• Madera County Sheriff's Department
• Marin County Sheriff's Office
• Mariposa County Sheriff's Department
• Mendocino County Sheriff's Office
• Merced County Sheriff's Office
• Modoc County Sheriff's Office
• Mono County Sheriff's Department
• Monterey County Sheriff's Office
• Napa County Sheriff's Department
• Nevada County Sheriff's Office
• Orange County Sheriff's Department
• Placer County Sheriff's Office
• Plumas County Sheriff's Office
• Riverside County Sheriff's Department
• Sacramento County Sheriff's Department
• Sacramento County Park Rangers
• San Benito County Sheriff's Office
• San Bernardino County Sheriff's Department
• San Bernardino County Probation Department
• San Diego County Sheriff's Department
• San Diego County Probation Department
• San Francisco Sheriff's Department
• San Joaquin County Sheriff's Department
• San Luis Obispo County Sheriff's Department
• San Mateo County Sheriff's Office
• Santa Barbara County Sheriff's Office
• Santa Clara County Sheriff's Office
• Santa Clara County Park Rangers
• Santa Clara County Department of Correction
• Santa Cruz County Sheriff's Office
• Shasta County Sheriff's Office
• Shasta County Marshal's Office
• Sierra County Sheriff's Office
• Siskiyou County Sheriff's Department
• Solano County Sheriff's Office
• Sonoma County Sheriff's Department
• Sonoma County Park Rangers
• Stanislaus County Sheriff's Department
• Sutter County Sheriff's Department
• Tehama County Sheriff's Office
• Trinity County Sheriff's Department
• Trinity County Marshal's Office
• Tulare County Sheriff's Office
• Tuolumne County Sheriff's Office
• Ventura County Sheriff's Office
• Yolo County Sheriff's Department
• Yuba County Sheriff's Department

Municipal agencies

• Alameda Police Department
• Albany Police Department
• Alhambra Police Department
• Alturas Police Department
• Anaheim Police Department
• Anderson Police Department
• Angels Camp Police Department
• Antioch Police Department
• Arcadia Police Department
• Arcata Police Department
• Arroyo Grande Police Department
• Arvin Police Department
• Atascadero Police Department
• Atherton Police Department
• Atwater Police Department
• Auburn Police Department
• Avenal Police Department
• Azusa Police Department
• Bakersfield Police Department
• Baldwin Park Police Department
• Banning Police Department
• Barstow Police Department
• Bear Valley Police Department
• Beaumont Police Department
• Bell Police Department
• Bell Gardens Police Department
• Belmont Police Department
• Belvedere Police Department
• Benicia Police Department
• Berkeley Police Department
• Beverly Hills Police Department
• Bishop Police Department
• Blythe Police Department
• Brawley Police Department
• Brea Police Department
• Brentwood Police Department
• Brisbane Police Department
• Buena Park Police Department
• Burbank Police Department
• Burlingame Police Department
• Calexico Police Department
• California City Police Department
• Calipatria Police Department
• Calistoga Police Department
• Campbell Police Department
• Capitola Police Department
• Carlsbad Police Department
• Carmel Police Department
• Cathedral City Police Department
• Central Marin Police Authority (joint powers agency comprising the cities of Corte Madera, Larkspur, and San Anselmo)
• Ceres Police Department
• Chico Police Department
• Chino Police Department
• Chowchilla Police Department
• Chula Vista Police Department
• Citrus Heights Police Department
• Claremont Police Department
• Clayton Police Department
• Clearlake Police Department
• Cloverdale Police Department
• Clovis Police Department
• Coalinga Police Department
• Colma Police Department
• Colton Police Department
• Colusa Police Department
• Concord Police Department
• Corcoran Police Department
• Corning Police Department
• Corona Police Department
• Coronado Police Department
• Costa Mesa Police Department
• Cotati Police Department
• Covina Police Department
• Crescent City Police Department
• Culver City Police Department
• Cypress Police Department
• Daly City Police Department
• Davis Police Department
• Del Rey Oaks Police Department
• Delano Police Department
• Desert Hot Springs Police Department
• Dinuba Police Department
• Dixon Police Department
• Dos Pablos Police Department
• Downey Police Department
• East Palo Alto Police Department
• El Cajon Police Department
• El Centro Police Department
• El Cerrito Police Department
• El Monte Police Department
• El Segundo Police Department
• Elk Grove Police Department
• Emeryville Police Department
• Escalon Police Department
• Escondido Police Department
• Etna Police Department
• Eureka Police Department
• Exeter Police Department
• Fairfax Police Department
• Fairfield Police Department
• Farmersville Police Department
• Ferndale Police Department
• Firebaugh Police Department
• Folsom Police Department
• Fontana Police Department
• Fort Bragg Police Department
• Fortuna Police Department
• Foster City Police Department
• Fountain Valley Police Department
• Fowler Police Department
• Fremont Police Department
• Fresno Police Department
• Fullerton Police Department
• Galt Police Department
• Garden Grove Police Department
• Gardena Police Department
• Gilroy Police Department
• Glendale Police Department
• Glendora Police Department
• Gonzales Police Department
• Grass Valley Police Department
• Greenfield Police Department
• Gridley Police Department
• Grover Beach Police Department
• Guadlupe Police Department
• Gustine Police Department
• Hanford Police Department
• Hawthorne Police Department
• Hayward Police Department
• Healdsburg Police Department
• Hemet Police Department
• Hercules Police Department
• Hermosa Beach Police Department
• Hillsborough Police Department
• Hollister Police Department
• Huntington Beach Police Department
• Huntington Park Police Department
• Huron Police Department
• Imperial Police Department
• Indio Police Department
• Inglewood Police Department
• Ione Police Department
• Irvine Police Department
• Irwindale Police Department
• Jackson Police Department
• Kensington Police Department
• Kerman Police Department
• King City Police Department
• Kingsburg Police Department
• La Habra Police Department
• La Mesa Police Department
• La Palma Police Department
• La Verne Police Department
• Laguna Beach Police Department
• Lakeport Police Department
• Lathrop Police Department
• Lemoore Police Department
• Lincoln Police Department
• Lindsay Department of Public Safety
• Livermore Police Department
• Livingston Police Department
• Lodi Police Department
• Lompoc Police Department
• Long Beach Police Department
• Los Alamitos Police Department
• Los Altos Police Department
• Los Angeles Police Department
• Los Angeles Bureau of Street Services, Investigation and Enforcement Division
• Los Angeles Sanitation and Environmental, Compliance and Enforcement Division
• Los Banos Police Department
• Los Gatos/Monte Sereno Police Department
• Madera Police Department
• Mammoth Lakes Police Department
• Manhattan Beach Police Department
• Manteca Police Department
• Marina Police Department
• Martinez Police Department
• Marysville Police Department
• McFarland Police Department
• Mendota Police Department
• Menifee Police Department
• Menlo Park Police Department
• Maricopa Police Department
• Merced Police Department
• Mill Valley Police Department
• Milpitas Police Department
• Modesto Police Department
• Monrovia Police Department
• Montclair Police Department
• Montebello Police Department
• Monterey Police Department
• Monterey Park Police Department
• Moraga Police Department
• Morgan Hill Police Department
• Morro Bay Police Department
• Mount Shasta Police Department
• Mountain View Police Department
• Murrieta Police Department
• Napa Police Department
• National City Police Department
• Nevada City Police Department
• Newark Police Department
• Newman Police Department
• Newport Beach Police Department
• Novato Police Department
• Oakdale Police Department
• Oakland Police Department
• Oakland Housing Authority Police Department
• Oakley Police Department
• Oceanside Police Department
• Ontario Police Department
• Orange Police Department
• Orange Cove Police Department
• Orland Police Department
• Oroville Police Department
• Oxnard Police Department
• Pacific Grove Police Department
• Pacifica Police Department
• Palm Springs Police Department
• Palo Alto Police Department
• Palos Verdes Estates Police Department
• Paradise Police Department
• Parlier Police Department
• Pasadena Police Department
• Paso Robles Police Department
• Petaluma Police Department
• Piedmont Police Department
• Pinole Police Department
• Pismo Beach Police Department
• Pittsburg Police Department
• Placentia Police Department
• Placerville Police Department
• Pleasant Hill Police Department
• Pleasanton Police Department
• Pomona Police Department
• Port Hueneme Police Department
• Porterville Police Department
• Red Bluff Police Department
• Redding Police Department
• Redlands Police Department
• Redondo Beach Police Department
• Redwood City Police Department
• Reedley Police Department
• Rialto Police Department
• Richmond Police Department
• Ridgecrest Police Department
• Rio Dell Police Department
• Ripon Police Department
• Riverside Police Department
• Rocklin Police Department
• Rohnert Park Department of Public Safety
• Roseville Police Department
• Ross Police Department
• Sacramento Police Department
• Salinas Police Department
• San Bernardino Police Department
• San Bruno Police Department
• San Carlos Police Department
• San Diego Police Department
• San Fernando Police Department
• San Francisco Police Department
• San Gabriel Police Department
• San Jose Police Department
• San Leandro Police Department
• San Luis Obispo Police Department
• San Marino Police Department
• San Mateo Police Department
• San Pablo Police Department
• San Rafael Police Department
• San Ramon Police Department
• Sand City Police Department
• Sanger Police Department
• Santa Ana Police Department
• Santa Barbara Police Department
• Santa Clara Police Department
• Santa Cruz Police Department
• Santa Maria Police Department
• Santa Monica Police Department
• Santa Paula Police Department
• Santa Rosa Police Department
• Sausalito Police Department
• Scotts Valley Police Department
• Seal Beach Police Department
• Seaside Police Department
• Sebastopol Police Department
• Selma Police Department
• Shafter Police Department
• Sierra Madre Police Department
• Signal Hill Police Department
• Simi Valley Police Department
• Soledad Police Department
• Sonora Police Department
• South Gate Police Department
• South Lake Tahoe Police Department
• South Pasadena Police Department
• South San Francisco Police Department
• St. Helena Police Department
• Stockton Police Department
• Suisun City Police Department
• Sunnyvale Department of Public Safety
• Susanville Police Department
• Sutter Creek Police Department
• Taft Police Department
• Tehachapi Police Department
• Tiburon Police Department
• Torrance Police Department
• Tracy Police Department
• Truckee Police Department
• Tulare Police Department
• Tulelake Police Department
• Turlock Police Department
• Tustin Police Department
• Ukiah Police Department
• Union City Police Department
• Upland Police Department
• Vacaville Police Department
• Vallejo Police Department
• Ventura Police Department
• Vernon Police Department
• Visalia Police Department
• Walnut Creek Police Department
• Watsonville Police Department
• Weed Police Department
• West Covina Police Department
• West Sacramento Police Department
• Westminster Police Department
• Westmoreland Police Department
• Wheatland Police Department
• Whittier Police Department
• Williams Police Department
• Willits Police Department
• Winters Police Department
• Woodlake Police Department
• Woodland Police Department
• Yreka Police Department
• Yuba City Police Department

Tribal agencies

• Bear River Police Department
• Blue Lake Rancheria Tribal Police Department
• Cahto Tribal Police Department
• Hoopa Valley Tribal Police Department
• Round Valley Tribal Police Department
• Yurok Tribal Police Department

College and university agencies

• Azusa Pacific University Campus Safety
• California State University police departments
• Chapman University Department of Public Safety
• Notre Dame de Namur University Department of Public Safety
• Saint Mary's College of California Department of Public Safety
• Stanford University Department of Public Safety
• University of California police departments
• University of the Pacific Police Department
• University of San Diego Department of Public Safety
• University of San Francisco Department of Public Safety
• University of Southern California Department of Public Safety

Community colleges

• Allan Hancock Community College Police Department
• Antelope Valley College District Police
• Cerritos Community College Police Department
• Chaffey College Police Department
• Coastline Community College District Police Department
• Coastline Community College Public Safety
• College of the Sequoias District Police Department
• Compton College Police Department
• Contra Costa Community College District Police Services
• Crafton Hills Community College Police Services
• Cuesta College Police Department
• El Camino College Police Department
• Foothill-De Anza College District Police Department
• Glendale Community College District Police Department
• Goldenwest College Public Safety
• Hartnell College Campus Safety Department
• Irvine Valley College Police Department
• Los Rios Community College Police Department
• Marin Community College District Police Department
• Merced Community College Police Department
• MiraCosta Community College Police Department
• Napa Valley College Police Department
• Palomar College Police Department
• Pasadena Area Community College District Police Department
• Riverside Community College District Police
• Saddleback College Police Department
• San Bernardino Community College District Police Department
• San Diego Community College District Police Department
• San Francisco Community College Police Department
• San Joaquin Delta College District Police Department
• San Jose/Evergreen College District Police Department
• San Mateo Community College District Department of Public Safety
• Santa Rosa Junior College District Police Department
• Santa Monica College Police Department
• Shasta College Campus Safety Department
• Solano Community College Police Department
• South Orange County Community College District Department of Campus Safety
• Southwestern Community College Police Department
• State Center Community College District Police Department
• Ventura County Community College Police Department
• Victor Valley College Police Department
• West Valley-Mission Community College District Police
• Yuba College Police Department

K–12 school agencies

• Apple Valley Unified School District Police Department
• Baldwin Park Unified School District Police
• Clovis Unified School District Police Department
• Compton Unified School District Police Department
• El Rancho Unified School District Police Department
• Elk Grove Unified School District Police Department
• Fontana Unified School District Police Department
• Hacienda La Puente Unified School District Police Department
• Hesperia School District Police Department
• Huntington Beach Union High School District Police Department
• Inglewood Unified School District Police Department
• Kern High School District Police Department
• Los Angeles School Police Department
• Long Beach Unified School District School Safety Department
• Montebello Unified School District Police Department
• Norwalk-La Mirada Unified School District School Safety Department
• San Bernardino City Unified School District Police Department
• San Diego Unified School District Police Department
• San José Unified School District Police Department
• Santa Ana Unified School District Police Department
• Snowline Joint Unified School District Police Department
• Stockton Unified School District Police Department
• Twin Rivers Unified School District Police Department
• Val Verde Unified School Police Department
• Victor Valley Union High School District Police Department
• West Contra Costa Unified School District Police Department

Special district and other agencies

• Bear Valley Police Department (Bear Valley Community Services District)
• Bethel Island Municipal Improvement District (BIMID)
• Broadmoor Police Protection District
• Capistrano Bay Police Department (Capistrano Bay Community Services District)
• Kensington Police Protection and Community Services District
• Lake Shastina Police Department (Lake Shastina C.S.D.)
• Stallion Springs Police Department
• Town of Discovery Bay Community Services District (CSD)

Animal

• Los Angeles Society for the Prevention of Cruelty to Animals Law Enforcement Division
• San Diego Humane Society Humane Law Enforcement

Parks

• California Exposition & State Fair Police (Cal Expo Police)
• East Bay Regional Park District Police Department
• Exposition Park Department of Public Safety
• Fulton–El Camino Park Police Department
• Long Beach Park Rangers (enveloped into Long Beach Police Department, disbandment proposed in late 2022)
• Los Angeles Park Ranger Division
• Midpeninsula Regional Open Space District Ranger Division
• Montebello Park Rangers
• Monterey County Park Rangers
• San Francisco Park Patrol
• Santa Ana Park Rangers
• Mountains Recreation and Conservation Authority Rangers

Transit

• BART Police
• Metropolitan Transit System Police Department
• Napa Valley Railroad Police Department
• Sacramento Regional Transit Police

Airport

• Burbank-Glendale-Pasadena Airport Authority Police
• Los Angeles Airport Police
• Kern County Airport Police
• Monterey Peninsula Airport Police
• Stockton Metropolitan Airport Police
• Santa Barbara Municipal Airport Airport Police

Port and harbor

• Long Beach Harbor Patrol
• Los Angeles Port Police
• Port of San Diego Harbor Police
• Port of Stockton Police
• Santa Cruz Harbor Patrol

Defunct agencies

• California State Police (merged into California Highway Patrol in 1995)
• California State Rangers (disbanded in 1853)
• California Bureau of Narcotic Enforcement (merged into California Bureau of Investigation in 2012)
• Alviso Police Department (merged into San Jose Police Department in 1968, when City of Alviso annexed into City of San Jose)
• Avalon Police Department (replaced by Los Angeles County Sheriff's Department in 1962)
• Blue Lake Police Department (merged with Humboldt County Sheriff's Department in 2008, partially replaced by Blue Lake Rancheria Tribal Police Department)
• Compton Police Department (disbanded in 2000, replaced by Los Angeles County Sheriff's Department)
• Dorris Police Department (replaced by Siskiyou County Sheriff's Office in 1996)
• Dunsmuir Police Department (replaced by Siskiyou County Sheriff's Office in 1992)
• Ft. Jones Police Department (replaced by Etna Police Department in December 12, 2019)
• Grossmont-Cuyamaca Community College Police Department (replaced by San Diego County Sheriff's Department in 2013)
• Half Moon Bay Police Department (replaced by San Mateo County Sheriff's Office in 2011)
• Holtville Police Department (merged into Imperial County Sheriffs' Office in 2010)
• Housing Authority City of Los Angeles Police Department (replaced by Los Angeles Police Department, December 31, 2003)
• Imperial Beach Police Department (merged into San Diego County Sheriff's Department, 1982)
• Isleton Police Department (replaced by Sacramento County Sheriff's Department, 2012)
• Los Angeles City Marshal (disbanded in 1876)
• Los Angeles General Services Police (now replaced by Los Angeles Police Department (LAPD) Security Services Division in 2012)
• Los Angeles Community College District Police Department (merged into LASD Community College Bureau in 2001)
• Los Angeles County Office of Public Safety (dissolved in 2010, duties assumed by the LASD County Services Bureau and Parks Bureau)
• Los Angeles County Marshal’s Department (merged into Los Angeles County Sheriff’s Department in 1994)
• Los Angeles County Metropolitan Transportation Authority Transit Police Department (disbanded, assets divided between LAPD and LASD, 1997; formerly the Southern California Rapid Transit District (RTD) Transit Police Department and RTD Transit Public Safety Department)
• Los Angeles Metropolitan Transit Authority Special Agents Department
• Los Angeles Railway Special Agents Department (merged into Los Angeles Metropolitan Transit Authority Special Agents Department, 1958)
• Maricopa Police Department (merged into Kern County Sheriff's Office in 2011)
• Maywood-Cudahy Police Department (disbanded, June 30, 2010; replaced by LASD)
• Millbrae Police Department (replaced by San Mateo County Sheriff's Office in 2012)
• Montague Police Department (replaced by Siskiyou County Sheriff's Office in 1983)
• Needles Police Department (ceased as independent Police Department, now part of San Bernardino County Sheriff’s Department under contract policing in 1989)
• Oakland Unified School District Police Department (disbanded in 2020)
• Orange County Marshal’s Department (absorbed into Orange County Sheriff's Department in 1 July 2000)
• Pacific Electric Special Agents Department (merged into Los Angeles Metropolitan Transit Authority Special Agents Department, 1958)
• San Benito County Marshal's Office (closed in 2010, duties transferred to San Benito County Sheriff's Office Civil Bureau)
• San Bernardino County Marshal’s Department (Merged into San Bernardino County Sheriff's Department Court Services Division in 1999)
• Santa Clara County Transit Police (replaced by Santa Clara County Sheriff's Department Transit Patrol Division)
• San Anselmo Police Department (merged into Twin Cities Police Authority to form Central Marin Police Authority in 2013)
• San Carlos Police Department (replaced by San Mateo County Sheriff's Office in 2010)
• San Diego County Marshal's Office (merged into San Diego County Sheriff's Department Court Services Bureau in January 1, 2000)
• San Juan Bautista Police Department (replaced by San Benito County Sheriff’s Office in 1993)
• Stanton Police Department (merged into Orange County Sheriff's Department (OCSD), February 1988)
• San Francisco Patrol Special Police (disbanded in 2024)
• Trinidad Police Department (duties assumed by Humboldt County Sheriff's Department, 2010; partially replaced by Trinidad Rancheria Police Department)
• Twin Cities Police Authority (merged with San Anselmo Police Department form into Central Marin Police Authority in 2013)
• Willows Police Department (replaced by Glenn County Sheriff's Office, July 1, 2017)

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