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San Diego County


Facts & Information

The Cities and communities of San Diego County, California *


Barrett, Bonsall, Borrego Springs, Boulevard

Campo, Camp Pendleton, Cardiff-by-the-Sea, Carlsbad, Chula Vista, Coronado, Crest

Del Mar, Descanso, Dulzura

El Cajon, Encinitas, Escondido


Imperial Beach

Jacumba, Jamul, Julian

Lakeside, La Mesa, Lemon Grove, Leucadia, Live Oak Springs

National City

Oak Grove, Oceanside, Ocotillo Wells

Pala, Pauma Valley, Pine Valley, Potrero, Poway

Rainbow, Ramona, Ranchita, Rancho Santa Fe

San Diego, San Marcos, Santa Ysabel, Santee, Solana Beach, Spring Valley

Valley Center, Vista

*This list of cities may not be complete. The list may contain towns, cities, villages, boroughs, neighborhoods, townships, ghost towns and other populated places.

If you have information about any of these unlinked communities, please send it to us and we will add a page for that community. Some of these places above may only be neighborhoods or local area names and are not listed with the census at all or just included in a larger surrounding designated census area..

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Information & Facts about San Diego County, California

County Government

Official San Diego County page

San Diego County Library


San Diego North Convention and Visitors Bureau

360 North Escondido Blvd.
Escondido, California 92025
Phone: 760.745.4741
Fax: 760.745.4796
Toll-free: 800.848.3336

San Diego Historical Society
PO Box 81825
San Diego, CA 92138-1825

Better Business Bureau
Serving San Diego and Imperial Counties
5050 Murphy Canyon, Suite 110
San Diego CA 92123
Office Hours: M-F 8:00AM - 5:00PM
Operators: M-F 9:00AM - 4:00PM
Automated Voice Response Phone:
(858) 496-2131 24 hours
Fax: (858) 496-2141


Anza-Borrego Desert State Park

Park Headquarters: 760-767-5311
Visitor Center Program Information: 760-767-4205
Camping Reservations: 800-444-PARK
Wildflower Hotline: 760-767-4684
200 Palm Canyon Drive
Borrego Springs, CA 92004

Historical Landmarks of San Diego County

Cabrillo National Monument


Here is a history page for San Diego County.

San Diego was one of the first 27 original counties in the state when it was created on 18 February 1850. The county had about 40,000 square miles when it was created, including all of San Diego, Imperial, Riverside, San Bernardino, and the eastern portion of Inyo County.

The name of the county is from San Diego de Alcala after Vizcano's flagship and favorite saint. Though the name is credited to Spaniard Don Sebastian Vizcano, who came into San Diego Bay on 12 November 1603, explorer Juan Rodriguez Cabrillo actually came 61 years earlier, naming it San Miguel.

total area: 4,225 square miles
65 miles from north to south and 86 miles from east to west.

Elevation: Sea level to 1,591 feet above sea level

The population

1990 - 2,498,016
1996 - 2,700,000
2000 - 2,911,500
(US Census figures)

Climate and Weather

High temperatures here rarely go over 80 and low temperatures rarely go under 60 making the San Diego area a great place to live. These temperatures are generally for the City of San Diego area. Once you travel to the inland areas of the county the temperatures will go up during summer and cool off more in winter, but are still generally wonderful!


San Diego County's southern boundary is our international border with Mexico Tijuana and Tecate are the two main border towns on the Mexico side of the border. The western boundary is the Pacific Ocean. Mission Bay is a prominent geographic feature on the San Diego County coast. Its eastern border is shared with Imperial County. The northern border is shared with a small part of Orange County and a much larger length of Riverside County. Here is a County map page

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This page was last updated on 19 April 2010 at 8:31 pm

This page was created on 28 September 2001