San Diego County ( / ˌsæn diˈeɪɡoʊ / ( listen) ), officially the County of San Diego ( Spanish: Condado de 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.
With a 2020 population of 1,386,932,  it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,286,069 estimated residents as of 2021. 
- 62 ft (19 m)
- Saint Didacus of Alcalá
San Diego County is a large county in the southwest area of California. The county borders Mexico. The population of San Diego County was about 3,095,313 in 2010, which makes San Diego County the second most populated county in California San Diego County has about 70 miles (110 km) of coastline.
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- Kumeyaay and Colonial Spanish Period
- Mexican Period
- An American Town
- Emergence of A Regional City
- War and Postwar Period
- Ethnic and Cultural Groups History
- Further Reading
Spanish exploration and colonial period
The first European to visit the region was Juan Rodríguez Cabrillo in 1542. His landing is re-enacted every year at the Cabrillo Festival sponsored by Cabrillo National Monument, but it did not lead to settlement. The bay and the area of present-day San Diego were given their current name sixty years later by Sebastián Vizcaíno when he was mapping the coastline of Alta California for Spain in 1602.Vizcaino was a merchant who hoped to establish prosperous colonies. After holding the first Cath...
First Mexican Empire and First Mexican Republic (1821–1835): Pueblo de San Diego
In 1821, Mexico ousted the Spanish in the Mexican War of Independence and created the Province of Alta California. The San Diego Mission was secularized and shut down in 1834 and the land was sold off. 432 residents petitioned the governor to form a pueblo, and Juan María Osuna was elected the first alcalde ("municipal magistrate"), defeating Pío Pico in the vote. Beyond town Mexican land grants expanded the number of California ranchosthat modestly added to the local economy. The original to...
Centralist Republic of Mexico (1835–1846): Decline of San Diego
In 1836, the Alta California and Baja California territories merged as the Department of Las Californias as part of the reforms made under Las Siete Leyes formalized under then President Antonio López de Santa Anna.
Alta California became part of the United States in 1848 following the U.S. victory in the Mexican–American War and the Treaty of Guadalupe Hidalgo, with the US-Mexican border established just south of the town. The resident "Californios" became American citizens with full voting rights. California was admitted to the Union as a state in 1850. San ...
The city grew in bursts, especially in the 1880s and again from 1900 to 1930, when it reached 148,000.
Since World War I, the military has played a leading role in the local economy. World War II brought prosperity and gave millions of soldiers, sailors and airmen en route to the Pacific a view of the opportunities in California. The aircraft factories grew from small handcraft shops to gigantic factories. The city's population soared from 200,000 t...
Californios and Chicano/Hispanic
After 1848 the Californios comprised a numerical majority and owned most of the property; they secured cultural and social recognition, but they failed to control the political system. By 1860, most had left the area and the remainder were on the decline economically. In World War II Hispanics made major breakthroughs in employment San Diego and in nearby farm districts. They profited from the new skills, contacts, and experiences provided by the military, filled many newly opened unskilled l...
The African American population was small before the great naval expansion of World War II. Starting in 1953, the Urban League brought together black and white professionals and businessmen and encouraged white business owners to hire blacks. Unlike other Urban League chapters, it built coalitions with San Diego's Mexican American community. According to the 2010 United States Census, African Americans are only 6.6% of San Diego's total population. For over 100 years San Diego's second oldest...
The region had an early Middle Eastern presence prior to contemporary US wars in the Middle East. Chaldeans, in particular, built a community in El Cajon in the mid 20th century, with the parish of the St. Peter Chaldean Catholic Cathedralestablished in 1973. The first wave of migration from the Middle East to the San Diego region began during the Iraq War, as many Iraqis sought refuge from war-torn Iraq. Many found refuge in El Cajon, where the city has become the center of the region's Midd...Colvin, Richard Lee. Tilting at Windmills: School Reform, San Diego, and America's Race to Renew Public Education(Harvard Education Press; 2013) 248 pages; Examines the reforms of former prosecutor...Engstrand, Iris H. W. San Diego: California's Cornerstone (1980), excerpt and text search, history by a leading scholarGarcia, Mario T. "A Chicano Perspective on San Diego History," Journal of San Diego History (1972) 18#4 pp 14–21 onlineLinder, Bruce. San Diego's Navy: An Illustrated History(2001)
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 ...
Within its borders of 4,200 sq. miles, San Diego County encompasses 18 incorporated cities and numerous other charming neighborhoods and communities, including downtown's historic Gaslamp Quarter, Little Italy, Coronado, La Jolla, Del Mar, Carlsbad, Escondido, La Mesa, Hillcrest, Barrio Logan and Chula Vista just to name a few.
Jul 1, 2022 · QuickFacts San Diego County, California; California. QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more.
The County provides a wide range of health, public safety and community services to residents of the region's 18 cities and a large unincorporated area. SanDiegoCounty.gov | SanDiegoCounty .gov
San Diego ( / ˌsæn diːˈeɪɡoʊ /) is the second largest city in the U.S. state of California and eighth largest in the United States. It is at the southwest corner of California, as well as the southwest corner of the continental United States. It was founded in 1769 and it is the oldest city in California.
May 24, 2023 · San Diego, port and city, seat (1850) of San Diego county, southern California, U.S. It lies along the Pacific Ocean at San Diego Bay, just north of the international border with Mexico and some 120 miles (195 km) southeast of Los Angeles.
San Diego (California) / 32.715, -117.1625. San Diego es una ciudad estadounidense ubicada en el condado de San Diego, California, en la costa del océano Pacífico en el Sur de California, aproximadamente 190 kilómetros al sur de Los Ángeles e inmediatamente adyacente a la frontera con México . Con una población estimada de 1 394 928 ...
San Diego County, California ni msumba uchoko panji nkhalwe ( county pachingelezi) iyo ikusangika mu boma likulu la California mu charu cha United States of America. Boma likulu la California lina tumisumba 58 mukwati mwake (counties). Ukaboni [ lemba | kulemba source] ↑ "Chronology". California State Association of Counties.