Los Angeles County CAGenWeb

                                                                      



  
Los Angeles County is available for adoption.

 If you have a local connection to Los Angeles County or an interest in California in general,
 Please consider joining the CAGenWeb as a County Coordinator.

 
 Contact Bob Jenkins if you are interested.

 In addition:,  we would appreciate any contribution that you would like to make  to this
 site:  biographies, obituaries, birth, marriage, death info,  grave info, photographs....etc

Los Angeles County, California

Los Angeles County’s story begins with the Tongva (Gabrielino) and Chumash peoples, who lived throughout the Los Angeles Basin for thousands of years. By the late 18th century, the Tongva had established numerous villages—including Yang‑Na, near today’s downtown—supported by fishing, gathering, and extensive trade networks.

Spanish exploration arrived in 1542 with Juan Rodríguez Cabrillo, followed by land expeditions in 1769 that opened the region to mission settlement. Mission San Gabriel (1771) and Mission San Fernando (1797) anchored early colonial life. In 1781, 44 settlers founded El Pueblo de Nuestra Señora la Reina de los Ángeles, the community that became the heart of the county.

After Mexico’s independence in 1821, the mission system was secularized and large ranchos dominated the landscape. The U.S. took control following the Mexican‑American War, and Los Angeles County was established as one of California’s original counties in 1850. Boundary changes followed: San Bernardino County was created from its eastern portion in 1853, Kern County in 1866, and Orange County in 1886.

The late 19th and early 20th centuries brought rapid growth fueled by railroads, agriculture, oil discoveries, and annexations. By the mid‑20th century, Los Angeles County had become a national center for film, aerospace, immigration, and suburban development, transforming it into the most populous county in the United States.

Today, Los Angeles County spans 4,083 square miles and reflects layers of Indigenous heritage, Spanish and Mexican settlement, early American frontier life, and modern urban expansion—offering genealogists a rich tapestry of communities, migrations, and records.