San Diego County

File:Flag of San Diego County, California.png

Flag of San Diego County.

File:Seal of San Diego County, California.png

Seal of San Diego County.

San Diego County is a large county in the southwest area of California. The county borders Mexico. The population of San Diego County was 3,298,634 in 2020, which makes San Diego County the second most populated county in California.

San Diego County has about 70 miles (110 km) of coastline. Most people live near the coast, for example in San Diego, California.

Also in this county there are 16 military locations of the United States Navy, U.S. Marine Corps and the U.S. Coast Guard, including Naval Base San Diego, Marine Corps Base Camp Pendleton, Marine Corps Air Station Miramar, and Naval Air Station North Island.

Communities

Top 15 Most Populated Communities in San Diego County
Rank	Name	Type	Population	Average income[1]	Violent crime rate[2]	Democrats	Republicans	Others	None
1	San Diego	City	1,296,437	$33,135	4.13	40.2%	27.0%	8.2%	27.7%
2	Chula Vista	City	236,218	$25,419	2.33	42.0%	27.7%	6.9%	26.1%
3	Oceanside	City	166,139	$27,674	4.25	31.6%	37.8%	9.2%	25.1%
4	Escondido	City	142,573	$23,194	4.26	28.3%	42.4%	9.3%	23.7%
5	Carlsbad	City	102,342	$42,712	2.46	28.0%	42.0%	8.5%	24.9%
6	El Cajon	City	98,813	$21,132	3.58	33.7%	37.4%	9.5%	23.2%
7	Vista	City	93,293	$21,478	4.84	29.9%	39.6%	9.4%	24.8%
8	San Marcos	City	80,709	$25,282	2.65	29.3%	40.6%	9.1%	24.8%
9	Encinitas	City	59,223	$47,346	2.46	35.1%	32.8%	9.0%	26.4%
10	National City	City	58,015	$16,611	6.19	48.9%	19.5%	7.0%	27.2%
11	La Mesa	City	56,722	$29,958	3.83	37.9%	32.5%	9.8%	23.6%
12	Santee	City	53,302	$28,242	2.82	27.0%	43.9%	9.7%	23.2%
13	Poway	City	47,762	$41,445	1.92	24.8%	45.7%	7.8%	24.8%
14	La Presa	CDP	34,607	$22,781	N/A	N/A	N/A	N/A	N/A
15	Fallbrook	CDP	30,949	$27,512	N/A	N/A	N/A	N/A	N/A

1.^  Per capita income (meaning the added up income of all residents divided by the population.)

1.^  Per 1,000 people (as of 2012)

San Diego County Media

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

• Mountlagunasmall.jpg

  Cleveland National Forest

• 4.3LasPlayasSunset1 copy 1.jpg

  Beach at Border Field 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)

• San Onofre Nuclear Generating Station

• Ethnic Origins in San Diego County, CA.png

  Ethnic origins in San Diego County

• Westfield UTC 1 2022-12-04.jpeg

  Westfield UTC in University City

• Petco Park Padres Game.jpg

  Petco Park, home of the San Diego Padres

• San Diego City and County Administration Building.jpg

  San Diego County Administration Center

• Starboard side view of USS Decatur (DDG-73) returning to San Diego 040309-N-7949W-002.jpg

  Coronado, California (9 March 2004) – The guided missile destroyer w:USS Decatur (DDG-73) makes it's way into w:San Diego Harbor, returning home with the w:USS Peleliu (LHA-5) part o