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

|colspan=10 align=center width=1200|Top 15 Most Populated Communities in San Diego County||||||||||||||||||
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|align="center"|1|San Diego|align="center"|City|align="center"|1,296,437|align="center"|$33,135|align="center"|4.13|align="center" bgcolor=#95D4F1|**40.2%**|align="center"|27.0%|align="center"|8.2%|align="center"|27.7%|
|align="center"|2|Chula Vista|align="center"|City|align="center"|236,218|align="center"|$25,419|align="center"|2.33|align="center" bgcolor=#95D4F1|**42.0%**|align="center"|27.7%|align="center"|6.9%|align="center"|26.1%|
|align="center"|3|Oceanside|align="center"|City|align="center"|166,139|align="center"|$27,674|align="center"|4.25|align="center"|31.6%|align="center" bgcolor=#FFA3A3|**37.8%**|align="center"|9.2%|align="center"|25.1%|
|align="center"|4|Escondido|align="center"|City|align="center"|142,573|align="center"|$23,194|align="center"|4.26|align="center"|28.3%|align="center" bgcolor=#FFA3A3|**42.4%**|align="center"|9.3%|align="center"|23.7%|
|align="center"|5|Carlsbad|align="center"|City|align="center"|102,342|align="center"|$42,712|align="center"|2.46|align="center"|28.0%|align="center" bgcolor=#FFA3A3|**42.0%**|align="center"|8.5%|align="center"|24.9%|
|align="center"|6|El Cajon|align="center"|City|align="center"|98,813|align="center"|$21,132|align="center"|3.58|align="center"|33.7%|align="center" bgcolor=#FFA3A3|**37.4%**|align="center"|9.5%|align="center"|23.2%|
|align="center"|7|Vista|align="center"|City|align="center"|93,293|align="center"|$21,478|align="center"|4.84|align="center"|29.9%|align="center" bgcolor=#FFA3A3|**39.6%**|align="center"|9.4%|align="center"|24.8%|
|align="center"|8|San Marcos|align="center"|City|align="center"|80,709|align="center"|$25,282|align="center"|2.65|align="center"|29.3%|align="center" bgcolor=#FFA3A3|**40.6%**|align="center"|9.1%|align="center"|24.8%|
|align="center"|9|Encinitas|align="center"|City|align="center"|59,223|align="center"|$47,346|align="center"|2.46|align="center" bgcolor=#95D4F1|**35.1%**|align="center"|32.8%|align="center"|9.0%|align="center"|26.4%|
|align="center"|10|National City|align="center"|City|align="center"|58,015|align="center"|$16,611|align="center"|6.19|align="center" bgcolor=#95D4F1|**48.9%**|align="center"|19.5%|align="center"|7.0%|align="center"|27.2%|
|align="center"|11|La Mesa|align="center"|City|align="center"|56,722|align="center"|$29,958|align="center"|3.83|align="center" bgcolor=#95D4F1|**37.9%**|align="center"|32.5%|align="center"|9.8%|align="center"|23.6%|
|align="center"|12|Santee|align="center"|City|align="center"|53,302|align="center"|$28,242|align="center"|2.82|align="center"|27.0%|align="center" bgcolor=#FFA3A3|**43.9%**|align="center"|9.7%|align="center"|23.2%|
|align="center"|13|Poway|align="center"|City|align="center"|47,762|align="center"|$41,445|align="center"|1.92|align="center"|24.8%|align="center" bgcolor=#FFA3A3|**45.7%**|align="center"|7.8%|align="center"|24.8%|
|align="center"|14|La Presa|align="center"|CDP|align="center"|34,607|align="center"|$22,781|align="center"|N/A|align="center"|N/A|align="center"|N/A|align="center"|N/A|align="center"|N/A|
|align="center"|15|Fallbrook|align="center"|CDP|align="center"|30,949|align="center"|$27,512|align="center"|N/A|align="center"|N/A|align="center"|N/A|align="center"|N/A|align="center"|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)