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About LA County

Los Angeles County, one of California's original 27 counties, was established Feb. 18, 1850.  It is one of the nation's largest counties with 4,084 square miles, and has the largest population of any county in the nation.  Approximately 27 percent of California's residents live here.  The Board of Supervisors is the governing body.  The 88 cities also have their own city councils.  If it were a nation, the County would have the 19th largest economy in the world.


County Annual Report
The County's Annual Report provides information on what County departments accomplished the past year and what their goals are for the coming year, with lots of photo pages to highlight activities.

Cities - Incorporation Facts
The first of the County's 88 cities was incorporated in 1850, the last in 1991. Cerritos used to be Dairy Valley; Venice, now part of Los Angeles, used to be its own city, and was first known as Ocean Park.

About LA County Links

Related Departments, Commissions, and Agencies

Did You Know?

  • There are more than 140 cultures and 135 languages, some say as high as 224, not including differing dialects.
  • There are 1,823 k-12 schools with 1.7 million students in the county.
  • The last major detachment of land from L.A. County was in 1889 with the creation of Orange County.
  • The largest population of persons of Filipino, Guatemalan, Korean, Mexican, Salvadoran and Thai descent outside their native countries live in L.A. County.
  • The county is the nation's top international trade center and the largest manufacturing center.
  • The county is the most religiously diverse in the world.
  • The county is home to more than 90 countries' consulate offices.
  • The county has the largest number of foreign-born residents in the nation (more than 3.4 million).
  • The County has more minority-and women-owned businesses than any other in the nation.
  • Students in Los Angeles Unified School District speak 92 languages.
  • Public higher education institutions include UCLA, five state university campuses and 21 community colleges.
  • Only Cook County has more black residents than L.A. County.
  • Los Angeles County was established Feb. 18, 1850.
  • Los Angeles County produces more college graduates and has more individuals with Ph.D.s than any other county in nation.
  • Los Angeles County is one of California's original 27 counties.
  • Los Angeles County is one of 58 counties in California.
  • L.A. County is the nation's aerospace research/development capital, birthplace of the Space Shuttle and Stealth fighter.
  • L.A. County is home to more than 244,000 businesses.
  • L.A. County is bordered by Orange, San Bernardino, Kern and Ventura counties.
  • If a nation, the county's economy would be the 19th largest in the world.
  • At one time, L.A. County was eight times its present size (34,520 square miles), stretching all the way to the Colorado River.
  • Approximately 7% of minority U.S. residents live in L.A.County.
  • Almost half of the residents speak only English. (2000 Census)
  • "Seventy-Six Cities" is the County's official song, adopted in 1965
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