San Diego County, California facts for kids

Quick facts for kids San Diego County
County
County of San Diego
From top down and left to right: F/A-18 Hornet flying over San Diego, Mission San Diego de Alcalá, San Diego State University's Hepner Hall, Hotel del Coronado, Torrey Pines State Natural Reserve, Jacumba Mountains
Flag Seal Logo
Location in California
Country	United States
State	California
Formed	February 18, 1850
Named for	Saint Didacus of Alcalá
County seat	San Diego
Largest city	San Diego
Government
• Type	Council–CEO
• Body	Board of Supervisors
Area
• Total	4,260.9 sq mi (11,036 km2)
• Land	3,942 sq mi (10,210 km2)
• Water	319 sq mi (830 km2)
Highest elevation	6,533 ft (1,991 m)
Population  (April 1, 2020)
• Total	3,298,634
• Density	837/sq mi (323/km2)
GDP
• Total	7.341 billion (2022)
Time zone	UTC–8 (Pacific Time Zone)
• Summer (DST)	UTC–7 (Pacific Daylight Time)
Area codes	760/442 and 619/858
FIPS code	06-073
Congressional districts	48th, 49th, 50th, 51st, 52nd

San Diego County (ⁱ/ˌsæn diˈeɪɡoʊ/), 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. 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.

San Diego County comprises the San Diego–Chula Vista–Carlsbad, CA Metropolitan Statistical Area, which is the 17th most populous metropolitan statistical area and the 18th most populous primary statistical area of the United States as of July 1, 2012. San Diego County is also part of the San Diego–Tijuana transborder metropolitan area, the largest metropolitan area shared between the United States and Mexico.

San Diego County has more than 70 miles (113 km) of coastline. This forms the most densely populated region of the county, which has a mild Mediterranean to semiarid climate and extensive chaparral vegetation, similar to the rest of the western portion of Southern California. Precipitation and temperature extremes increase to the east, with mountains that receive frost and snow in the winter. These lushly forested mountains receive more rainfall than the average in Southern California, while the desert region of the county lies in a rain shadow to the east, which extends into the Desert Southwest region of North America.

There are 16 military installations of the U.S. Navy, U.S. Marine Corps, and U.S. Coast Guard in San Diego County. These include Naval Base San Diego, Marine Corps Base Camp Pendleton, Naval Air Station North Island, Marine Corps Air Station Miramar, and Coast Guard Air Station San Diego.

From north to south, San Diego County extends from the southern borders of Orange and Riverside Counties to the Mexico–U.S. border and the Baja California municipalities of Tijuana and Tecate. From west to east, San Diego County stretches from the Pacific Ocean to its boundary with Imperial County, which separated from it in 1907.

History

The area which is now San Diego County has been inhabited for more than 10,000 years by Kumeyaay (also called Diegueño), Luiseño, Cupeño and Cahuilla Indians.

In 1542, the Portuguese-born explorer Juan Rodríguez Cabrillo, sailing for Spain, claimed San Diego Bay for the Spanish Empire, and he named the site San Miguel. In November 1602, Sebastián Vizcaíno surveyed the harbor and what are now Mission Bay and Point Loma and named the area for Saint Didacus, a Spaniard more commonly known as San Diego. European settlement in what is now San Diego County began with the founding of the San Diego Presidio and Mission San Diego de Alcalá by Spanish soldiers and clerics in 1769. This county was part of Alta California under the Viceroyalty of New Spain until the Mexican declaration of independence. From 1821 through 1848 this area was part of Mexico.

San Diego County became part of the United States as a result of the Treaty of Guadalupe Hidalgo in 1848, ending the U.S.-Mexican War. This treaty designated the new border as terminating at a point on the Pacific Ocean coast which would result in the border passing one Spanish league south of the southernmost portion of San Diego Bay, thus ensuring that the United States received all of this natural harbor.

San Diego County was one of the original counties of California, and it was created at the time of California statehood in 1850.

At the time of its establishment in 1850, San Diego County was relatively large, and included all of southernmost California which was south and east of Los Angeles County. As such it included areas of what are now Inyo County and San Bernardino County, as well as all of what is now Riverside County and Imperial County.

During the later part of the 19th century, there were numerous changes in the boundaries of San Diego County, when various areas became separated for the counties mentioned above. The most recent changes were the establishments of Riverside County in 1893 and Imperial County in 1907. Imperial County was also the last county to be established in California, and after this division, San Diego no longer extended from the Pacific Ocean to the Colorado River, and it no longer covered the entire border between California and Mexico.

Geography

Many of the cities seen from the sky as part of the San Diego-Tijuana metropolitan area.

According to the U.S. Census Bureau, the county has an area of 4,526 square miles (11,720 km²), of which 4,207 square miles (10,900 km²) is land and 319 square miles (830 km²) (7.0%) is water. The county is larger in area than the combined states of Rhode Island and Delaware.

San Diego County has a varied topography. On its western side is 70 miles (110 km) of coastline. Most of San Diego between the coast and the Laguna Mountains consists of hills, mesas, and small canyons. Snow-capped (in winter) mountains rise to the northeast, with the Sonoran Desert to the far east. Cleveland National Forest is spread across the central portion of the county, while the Anza-Borrego Desert State Park occupies most of the northeast.

Although the county's western third is primarily urban, the mountains and deserts in the eastern two-thirds are primarily of undeveloped backcountry. Most of these backcountry areas are home to a native plant community known as chaparral. San Diego County contains more than a million acres (4,000 km²) of chaparral, twice as much as any other California county.

North San Diego County is known as North County; the exact geographic definitions of "North County" vary, but it includes the northern suburbs and sometimes certain northern neighborhoods of the City of San Diego.

The eastern suburbs are collectively known as East County, though most still lie in the western third of the county. The southern suburbs and southern detached portion of the city of San Diego, extending to the Mexican border, are collectively referred to as South Bay.

Periodically the area has been subject to wildfires that force thousands to evacuate. The most recent are the May 2014 San Diego County wildfires; before them was the Witch Creek Fire in 2007 and the Cedar Fire in 2003. California defines a fire season in which fires are most likely to occur, usually between late July and late October (which are the driest months of the area). Signs posted in numerous spots of the county provide information on the level of threats from fires based on weather conditions.

Climate

Cleveland National Forest

Under the Köppen climate classification system, the San Diego area straddles areas of Mediterranean climate (CSa) to the north and semi-arid climate (BSh) to the south and east. As a result, it is often described as "arid Mediterranean" and "semi-arid steppe". San Diego's climate is characterized by warm, dry summers and mild winters with most of the annual precipitation falling between November and March. The city has mild, mostly dry weather, with an average of 201 days above 70 °F (21 °C) and low rainfall (9–13 inches (23–33 cm) annually). Summer temperatures are generally warm, with average highs of 70–78 °F (21–26 °C) and lows of 55–66 °F (13–19 °C). Temperatures exceed 90 °F (32 °C) only four days a year. Most rainfall occurs from November to April. Winter temperatures are mild, with average high temperatures of 66–70 °F (19–21 °C) and lows of 50–56 °F (10–13 °C).

The climate in the San Diego area, like much of California, often varies significantly over short geographical distances resulting in microclimates. In San Diego's case this is mainly due to the city's topography (the Bay, and the numerous hills, mountains, and canyons). Frequently, particularly during the "May gray/June gloom" period, a thick marine layer will keep the air cool and damp within a few miles of the coast, but will yield to bright cloudless sunshine approximately 5–10 miles (8.0–16.1 km) inland. This happens every year in May and June. Even in the absence of June gloom, inland areas tend to experience much more significant temperature variations than coastal areas, where the ocean serves as a moderating influence. Thus, for example, downtown San Diego averages January lows of 50 °F (10 °C) and August highs of 78 °F (26 °C). The city of El Cajon, just 10 miles (16 km) northeast of downtown San Diego, averages January lows of 42 °F (6 °C) and August highs of 88 °F (31 °C).

Rainfall along the coast averages about 10 inches (25 cm) of precipitation annually, which occurs mainly during the cooler months of December through April. Though there are few wet days per month during the rainy period, rainfall can be heavy when it does occur. However, the rainfall is greater in the higher elevations of San Diego. Some of the higher areas of San Diego can receive 11–13 inches (28–33 cm) of rain a year.

Adjacent counties and municipalities

San Diego

Orange

Riverside

Imperial

Tijuana,
Baja California,
Mexico

Tecate,
Baja California,
Mexico

Pacific
Ocean

Counties adjacent to San Diego County, California

Beach at Border State Park; San Diego is on the right while Tijuana is on the left.

Border fence between Tijuana (right) and San Diego's border patrol offices (left)

National protected areas

• Cabrillo National Monument
• Cleveland National Forest (part)
• San Diego National Wildlife Refuge Complex, which includes
  • San Diego National Wildlife Refuge
  • San Diego Bay National Wildlife Refuge
  • Tijuana Slough National Wildlife Refuge
  • Seal Beach National Wildlife Refuge (located in Orange County)

There are 7 official wilderness areas in San Diego County that are part of the National Wilderness Preservation System. Four of these are integral parts of Cleveland National Forest, whereas three are managed by the Bureau of Land Management. Some of these extend into neighboring counties (as indicated below):

• Otay Mountain Wilderness (BLM)
• Pine Creek Wilderness (Cleveland National Forest)
• Hauser Wilderness (Cleveland National Forest)
• Carrizo Gorge Wilderness (BLM)
• Sawtooth Mountains Wilderness (BLM)
• Agua Tibia Wilderness (Cleveland National Forest) partly in Riverside County
• San Mateo Canyon Wilderness (Cleveland National Forest) mostly in Riverside County

State parks and protected areas

Mountains

There are 236 mountain summits and peaks in San Diego County including:

Bays and lagoons

Lakes

Rivers

• San Diego River
• San Luis Rey River
• San Dieguito River
• Sweetwater River (California)
• Otay River
• Tijuana River
• Santa Margarita River

Demographics

In the 1847 census of San Diego County ordered by Richard Barnes Mason, it found that 2,287 people lived in the county, to include Native Americans, Pacific Islanders, and African Americans. Since at least 2014, San Diego County is the fifth most populous county in the United States. In 2000, only about 3% of San Diego County residents left the county for work while 40,000 people commuted into the metropolitan area.

Ethnic origins in San Diego County

2020 census

Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.

Racial and Ethnic Composition since 1960

Race

The 2010 United States Census reported that San Diego County had a population of 3,095,313. The racial makeup of San Diego County was 1,981,442 (64.0%) White, 158,213 (5.1%) African American, 26,340 (0.9%) Native American, 336,091 (10.9%) Asian (4.7% Filipino, 1.6% Vietnamese, 1.4% Chinese, 3.2% Other Asian), 15,337 (0.5%) Pacific Islander, 419,465 (13.6%) from other races, and 158,425 (5.0%) from two or more races. Hispanic or Latino of any race were 991,348 people (32.0%). Including those of mixed race, the total number of residents with Asian ancestry was 407,984.

As of 2009, the racial makeup of the county was 79.4% White American, 5.6% Black or African American, 1% Native American, 10.4% Asian, 0.5% Pacific Islander, 10.3% from other races, and 3.6% from two or more races. 31.3% of the population were Hispanic or Latino of any race.

67.0% spoke only English at home; 21.9% spoke Spanish, 3.1% Tagalog and 1.2% Vietnamese.

Other demographic data

As of 2018 Census Bureau estimates, there were 3,343,364 people, 1,067,846 households, and 663,449 families residing in the county. The population density was 670 inhabitants per square mile (260/km²). There were 1,142,245 housing units at an average density of 248 per square mile (96/km²).

In 2000 there were 994,677 households, out of which 33.9% had children under the age of 18 living with them, 50.7% were married couples living together, 11.6% had a female householder with no husband present, and 33.3% were non-families. 24.2% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.29.

As of 2000, 25.7% of the population was under the age of 18, 11.30% was from 18 to 24, 32.0% from 25 to 44, 19.8% from 45 to 64, and 11.2% was 65 years of age or older. The median age was 33 years. For every 100 females, there were 101.2 males. For every 100 females age 18 and over, there were 99.7 males.

In 2012, it was estimated that there were 198,000 unauthorized immigrants; the origin of the plurality of them is Mexico.

In 2018, the median household income was $70,824; most people spend more than 30% of their income on housing costs. In August of that year, the median home price was $583,000; this is lower than the median home price in Los Angeles, and Orange counties.

Income

According to the 2000 Census, the median income for a household in the county was $47,067, and the median income for a family was $53,438. Males had a median income of $36,952 versus $30,356 for females. The per capita income for the county was $22,926. About 8.9% of families and 12.4% of the population were below the poverty line, including 16.5% of those under age 18 and 6.8% of those age 65 or over.

Much of the county's high-income residents are concentrated in the northern part of the city of San Diego. The San Diego metropolitan area has two places with both a population of over 50,000 and a per capita income of over $40,000: Carlsbad and Encinitas.

The county's largest continuous high-income urban area is a triangle from a first point on the northern edge of Carlsbad, a second point southeast of Escondido, and a third point on the southern edge of La Jolla. It contains all or most of the cities of Carlsbad, Encinitas, Solana Beach, Del Mar, and Poway in addition to a substantial portion of northern San Diego.

Homelessness

According to a Point-In-Time count taken for the San Diego Regional Task Force on the Homeless, there were 8,576 homeless individuals on January 6, 2018, a 6% decrease from 2017. 3,586 were sheltered, and 4,990 were not. 4,912 (75.3%) were in the City of San Diego. North County Inland had 1,153 (13.4%), North County Coastal with 822 homeless (9.6%), 602 (7%) were found in South County, and 1,087 (12.7%) in East County.

Religion

According to the Pew Research Center as of 2014^[update], 68% of adults in the county are Christian, of whom 32% are Catholic. 27% were unaffiliated, and 5% adhered to a Non-Christian faith. According to the University of Southern California, in 2010, the largest faith in the county was Catholicism, followed by Nondenominational Christians, and Mormons.

In 2014, the county had 978 religious organizations, the seventh most out of all US counties.

Immigration data

In 2014 according to Pew Research Center, there are about 170,000 undocumented immigrants living in the region. ..... In 2018, the United States Border Patrol caught an average of over a hundred individuals crossing the border illegally each day.

Economy

San Diego County and Imperial County are part of the Southern Border Region, one of nine such regions. As a regional economy, the Southern Border Region is the smallest but most economically diverse region in the state. However, the two counties maintain weak relations and have little in common aside from their common border. The region has a high cost of living. This includes the highest cost of water in the United States. As of 2018^[update], San Diego County is within the top ten highest cost of rent in the United States; this has led to people moving out of the county.

Agriculture

San Diego County's agriculture industry was worth $1.85 billion in 2013, and is one of the top five egg producing counties in the United States. In 2013, San Diego County also had the most small farms of any county in the United States, and had the 19th largest agricultural economy of any county in the United States. According to the San Diego Farm Bureau, San Diego County is the United States' leading producer of avocados and nursery crops. Until the early 20th century, San Diego County had a thriving wine industry; however the 1916 Charles Hatfield flood was the beginning of the end of the industry which included the destruction of the Daneri winery in Otay Valley. As of October 2016^[update], there are roughly one hundred vineyards and wineries in San Diego County.

By the 2019–2020 statistical survey, California Department of Food & Agriculture (cdfa) found that the nursery trade dominated the county's agriculture by dollar value. Second place went to avocado production.

Breweries

The county has been called "the Craft Beer Capital of America". Brewing has been one of the fastest-growing business sectors with local breweries ranking among the 50 largest craft brewers in the United States and breweries that are consistently rated among the top breweries in the world.

Tourism

Horton Plaza, before its closure for redevelopment in 2020

Tourism plays a large part in the economics of the San Diego metropolitan area. Tourists are drawn to the region for a well rounded experience, everything from shopping to surfing as well as its mild climate. Its numerous tourist destinations include Westfield UTC, Seaport Village, Westfield Mission Valley and Fashion Valley Mall for shopping. SeaWorld San Diego and Legoland California as amusement parks. Golf courses such as Torrey Pines Golf Course and Balboa Park Golf Course. Museums such as the Museum of Us, San Diego Museum of Art, Reuben H. Fleet Science Center, San Diego Natural History Museum, USS Midway Museum, and the San Diego Air and Space Museum. Historical places such as the Gaslamp Quarter, Balboa Park and Old Town San Diego State Historic Park. Wildlife refuges, zoos, and aquariums such as the Birch Aquarium at Scripps, San Diego Zoo's Safari Park, San Diego Zoo and San Diego-La Jolla Underwater Park. Outdoor destinations include the Peninsular Ranges for hiking, biking, mountainboarding and trail riding. Surfing locations include Swami's, Stone Steps Beach, Torrey Pines State Beach, Cardiff State Beach, San Onofre State Beach and the southern portion of Black's Beach.

The region is host to the second largest cruise ship industry in California which generates an estimated $2 million annually from purchases of food, fuel, supplies, and maintenance services. In 2008 the Port of San Diego hosted 252 ship calls and more than 800,000 passengers.

Culture

The culture of San Diego is influenced heavily by American and Mexican cultures due to its position as a border town, its large Hispanic population, and its history as part of Spanish America and Mexico. The area's longtime association with the U.S. military also contributes to its culture. Present-day culture includes many historical and tourist attractions, a thriving musical and theatrical scene, numerous notable special events, a varied cuisine, and a reputation as one of America's premier centers of craft brewing.

Sites of interest

• Mount Laguna Observatory, owned and primarily operated by San Diego State University
• Palomar Observatory, owned and primarily operated by the California Institute of Technology
• The Ramona Valley wine-producing region, located 28 miles (45 km) northeast of the city of San Diego
• San Diego Zoo Safari Park, formerly known as the San Diego Wild Animal Park, 35 miles (56 km) north of the San Diego Zoo and east of Escondido
• SeaWorld San Diego on Mission Bay.
• Mission Bay Park, including Fiesta Island, a sheltered bay popular for water sports, also known for the annual Over the line tournament.
• Mission San Diego de Alcala, the first of California's 21 Spanish missions. It is an operating Roman Catholic parish and also is open for historical interest tours during the week. It is located near the interchange of Interstates 8 and 15.
• Mission San Luis Rey, founded on June 13, 1798, by Padre Fermín Lasuén. It is the 18th of the Spanish missions established in California. It is an operating Roman Catholic parish and is open every day for historical interest tours. It is located near Route 76 in the Oceanside area.
• Balboa Park, with numerous museums and other cultural locations, just north of Downtown San Diego.
• San Diego Zoo, located in Balboa Park
• Presidio Park, located on a bluff directly above Old Town, a city historic park on the site of the San Diego Presidio, the first European settlement in California.
• San Diego Bay contains the aircraft carrier USS Midway now used as a memorial ship and as a floating museum, and the eight floating museum ships of the San Diego Maritime Museum. Harbor cruises, sailing, and sport fishing are also available
• San Diego Botanic Garden, a 37-acre botanic oasis in the coastal community of Encinitas. Features 4 miles of meandering trails, 5,300+ plant species and 29 uniquely themed gardens, including the largest public bamboo collection in North America.
• Legoland California, a Lego theme park in Carlsbad
• Sesame Place San Diego, a Sesame Street theme park in Chula Vista
• Alta Vista Gardens is a Botanical Garden in Vista dedicated to bringing together 'People, Nature & Art'.
• Mount Ecclesia is a historic district noted for its singular architecture and the preservation of nature grounds and gardens, offering a unique meditative walking experience. It is located about a mile east of Interstate 5 in the Oceanside area.
• San Dieguito County Park

Sports

Petco Park in downtown San Diego, home of the San Diego Padres

Sports in San Diego includes major professional league teams, other highest-level professional league teams, minor league teams, and college athletics. The San Diego Padres compete in Major League Baseball (MLB). San Diego FC begins play in Major League Soccer (MLS) in 2025. The San Diego State Aztecs compete in NCAA Division I (FBS). The Farmers Insurance Open, a professional golf tournament on the PGA Tour, is played annually at Torrey Pines Golf Course.

Professional teams

The following teams compete at their sport's highest level of domestic competition.

• Bold indicates major professional league team.
• Italic indicates club or semi-pro team competing in its sport's highest level league, where the sport has no fully-professional domestic competition.

Minor league teams

The following teams compete below their sport's highest level of domestic competition.

College teams

Annual events

Torrey Pines Golf Course, home of the Farmers Insurance Open

Education

San Diego County contains three public state universities: University of California, San Diego (UCSD); San Diego State University (SDSU); and California State University, San Marcos (CSUSM). Major private universities in the county include University of San Diego (USD), Point Loma Nazarene University (PLNU), Alliant International University (AIU), and National University. It also includes three law schools, USD School of Law, California Western School of Law, and Thomas Jefferson School of Law.

Within the county there are 24 public elementary school districts, 6 high school districts, and 12 unified school districts. There are also five community college districts.

Several cities in the county maintain public library systems, including the city of San Diego itself. The San Diego County Library serves all other areas of the county. In 2010 the county library had 33 branches and two bookmobiles; circulated over 10.7 million books, CDs, DVDs, and other material formats; recorded 5.7 million visits to library branches; and hosted 21,132 free programs and events. The San Diego County Library is one of the 25 busiest libraries in the nation as measured by materials circulated.

Community College Districts

• Grossmont-Cuyamaca Community College District
• MiraCosta Community College District
• Palomar Community College District
• San Diego Community College District
• Southwestern Community College District

K-12 schools

School districts

K-12 unified:

Secondary:

Elementary:

Military

USS Decatur (DDG-73)

San Diego is the headquarters of the U.S. Navy's Eleventh Naval District and is the Navy's principal location for West Coast and Pacific Ocean operations. Naval Base San Diego, California is principal home to the Pacific Fleet (although the headquarters is located in Pearl Harbor). NAS North Island is located on the north side of Coronado, and is home to Headquarters for Naval Air Forces and Naval Air Force Pacific, the bulk of the Pacific Fleet's helicopter squadrons, and part of the West Coast aircraft carrier fleet.

The Naval Special Warfare Center is the primary training center for SEALs, and is also located on Coronado. The area contains five major naval bases and the U.S. Marines base Camp Pendleton. Marine Corps Base Camp Pendleton is the major West Coast base of the United States Marine Corps and serves as its prime amphibious training base. It is located on the Southern California coast, bordered by Oceanside to the south, San Clemente to the north, and Fallbrook to the east.

U.S. Navy

• Naval Base San Diego, also known as 32nd Street Naval Station
• Naval Amphibious Base Coronado
• Naval Air Station North Island
• Naval Base Point Loma, which includes the Submarine Base and the Fleet Antisubmarine Warfare Training Center
• Space and Naval Warfare Systems Command (SPAWAR)
• Naval Medical Center San Diego, also known as Bob Wilson Naval Hospital and Balboa Naval Hospital

U.S. Marine Corps

• Marine Corps Base Camp Pendleton
• Marine Corps Air Station Miramar
• Marine Corps Recruit Depot San Diego

U.S. Coast Guard

• Coast Guard Air Station San Diego

Media

San Diego County is primarily served by media in San Diego, including TV and radio stations based in the city.

Newspapers

San Diego County is served by many newspapers. The major regional paper is The San Diego Union-Tribune, also known as U-T San Diego or just "The U-T" by locals, is ranked 23rd in the country (by daily circulation) as of March 2013. The Union-Tribune serves both San Diego County and neighboring Imperial County. The former North County Times, based in Escondido and serving portions of Riverside County and North County, was purchased by the Union-Tribune in 2012 and closed down. For about a year after absorbing the North County Times the Union-Tribune published a North County edition, but the regional edition was later abandoned. The Los Angeles Times is also delivered in portions of the county. Many of the area's cities, towns and neighborhoods have their own local newspapers; the Union Tribune bought eight local weeklies in 2013 and is continuing to publish them as independent local newspapers. The San Diego Daily Transcript reports business and legal news. Privately published papers like the Military Press Newspaper and the Navy Dispatch serve the military community both on and off base.

Other media

County Television Network is a public-access television cable channel, offering a "hometown blend of C-SPAN, the Lifetime, History, Travel, and Discovery channels" for the county, and funded by fees paid by cable companies.

Transportation

Major highways

Border crossings to Mexico

• San Ysidro Port of Entry
• Otay Mesa Port of Entry
• Otay Mesa East Port of Entry (projected opening 2024)
• Tecate Port of Entry

Railroads

• (Amtrak) Pacific Surfliner
• Coaster
• Metrolink
• San Diego and Arizona Eastern Railway
• San Diego and Imperial Valley Railroad

Light rail and local transit

• San Diego Trolley
• San Diego Metropolitan Transit System (SDMTS/MTS)
• Sprinter
• North County Transit District (NCTD)

The Port of San Diego

• Embarcadero (San Diego)

Airports

Carlsbad

• McClellan-Palomar Airport (CRQ) a.k.a. Palomar Airport or Carlsbad Airport

El Cajon

• Gillespie Field (SEE)

Oceanside

• Oceanside Municipal Airport (OKB)

City of San Diego

• San Diego International Airport (SAN) a.k.a. Lindbergh Field
• Montgomery-Gibbs Executive Airport (MYF)
• Brown Field Municipal Airport (SDM) (formerly East Field, NAAS Otay Mesa, and NAAS Brown Field)

Unincorporated San Diego County

• Agua Caliente Airport (L54)
• Borrego Valley Airport (L08)
• Fallbrook Community Airpark (L18)
• Jacumba Airport (L78)
• Ocotillo Airport (L90)
• Ramona Airport (RNM)

Communities

North County communities. Coastal cities are in dark blue, unincorporated coastal communities are in light blue. Inland cities are in dark yellow, unincorporated inland communities are in light yellow. Parts of northern San Diego are sometimes considered part of North County, as are much of the white areas north of the city.

East County communities in red. In dark red are the cities and towns of Santee and El Cajon which mark the western edge of East County. Unincorporated communities are in light red, including Lakeside and Alpine.

South Bay communities of San Diego County. The cities and towns of National City, Chula Vista, and Imperial Beach are in dark orange. The unincorporated community of Bonita is in light orange. San Ysidro and Otay Mesa, neighborhoods of the city of San Diego, are in pink.

Cities

Census-designated places

Unincorporated communities

Indian reservations

San Diego County has 18 federally recognized Indian reservations, more than any other county in the United States. Although they are typical in size to other Indian reservations in California (many of which are termed "Rancherías"), they are relatively tiny by national standards, and all together total 200.2 square miles (518.5 km²) of area.

Population ranking

The population ranking of the following table is based on the 2010 census of San Diego County.

† county seat

See also

In Spanish: Condado de San Diego para niños