| District Attorney of Los Angeles County | |
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 Seal of the Los Angeles County District Attorney | |
 Flag of Los Angeles | |
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| Seat | Clara Shortridge Foltz Criminal Justice Center 210 West Temple Street Los Angeles, California |
| Term length | Four years |
| Constituting instrument | Charter of the County of Los Angeles |
| Formation | 1852 |
| First holder | William C. Ferrell |
| Salary | $346,414 (2020) |
| Website | https://da.lacounty.gov/ |
The District Attorney of Los Angeles County is in charge of the office that prosecutes felony and misdemeanor crimes that occur within Los Angeles County, California, United States. The current district attorney (DA) is George Gascón.
Some misdemeanor crimes are prosecuted by local city attorneys. City attorneys prosecute misdemeanors and infractions that are violations of the municipal code governing incorporated cities, such as Los Angeles and Long Beach, within the county. All other felony and misdemeanors within Los Angeles County are prosecuted by the district attorney's office. According to the district attorney's official website, the office is the largest local prosecutor's office in the United States. The Los Angeles County Public Defender provides legal assistance to individuals charged with a crime who are financially unable to hire and pay for their own private lawyers.