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Geography & Statistics

Los Angeles County is diverse. It has mountains, deserts, beaches and islands. It is urban and suburban. One city has 4 million people, another 95. Residents are very rich and very poor. They come from throughout the world and speak more than 100 – some say more than 200 – languages. It has more residents than any other county in the nation and is one of the largest in size.


Solar Mapping Program Debuts
A new solar mapping program allows homeowners and businesses in Los Angeles County to go online to determine if their properties are good candidates for solar power. To use the free service, go to

Rain Statistics
The Public Works Department tracks rainfall in the County through 62 rain gauges, updating the information every 10 minutes.

Unincorporated Area Demographics
In households in the unincorporated areas of the County, 49.5 percent have children under 18 years of age and 23 percent have individuals older than 65, according to a County analysis.

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Did You Know?

  • There are 75 miles of mainland beach in L.A. County; 9 percent of the state's coastline.
  • The average rainfall in the County is 15.5 inches.
  • The County's 4,084 square miles makes it one of the nation's largest counties.
  • The County is the most populous county in the nation, with 10.4 million people.
  • The County has two islands: Santa Catalina and San Clemente.
  • If the County were a state, it would be the eighth most populous.
  • Approximately 30 percent of California's residents live in the County.
  • Altitudes in the County vary from 9 ft. below sea level in Wilmington to 10,080 ft. above sea level at Mt. San Antonio.
The website has made reasonable efforts to provide an accurate translation. However, no automated or computerized translation is perfect and is not intended to replace human or traditional translation methods. The official text is the English version of website. If any questions arise concerning the accuracy of the information presented by the translated version of the website, please refer to the English edition of the website, which is the official version.
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