Hollywood is a district in Los Angeles, California, United States, situated west-northwest of Downtown Los Angeles. Due to its fame and cultural identity as the historical center of movie studios and movie stars, the word "Hollywood" is often used as a metonym of cinema of the United States. The nickname Tinseltown refers to the glittering, superficial nature of Hollywood and the movie industry. Today, much of the movie industry has dispersed into surrounding cities such as Burbank and the Los Angeles Westside, but significant auxiliary industries, such as editing, effects, props, post-production and lighting companies, remain in Hollywood, as does the backlot of Paramount Pictures.

Many historic Hollywood theaters are used as venues and concert stages to premiere major theatrical releases and host the Academy Awards. It is a popular destination for nightlife and tourism and home to the Hollywood Walk of Fame.

Although it is not the typical practice of the city of Los Angeles to establish specific boundaries for districts or neighborhoods, Hollywood is a recent exception. On February 16, 2005, Assembly Members Goldberg and Koretz introduced a bill to require California to keep specific records on Hollywood as though it were independent. For this to be done, the boundaries were defined. This bill was unanimously supported by the Hollywood Chamber of Commerce and the Los Angeles City Council. Assembly Bill 588 was approved by the Governor on August 28, 2006, and now the district of Hollywood has official borders. The border can be loosely described as the area east of Beverly Hills and West Hollywood, south of Mulholland Drive, Laurel Canyon, Cahuenga Boulevard, and Barham Boulevard, and the cities of Burbank and Glendale, north of Melrose Avenue and west of the Golden State Freeway and Hyperion Avenue. This includes all of Griffith Park and Los Feliz—two areas that were hitherto generally considered separate from Hollywood by most Angelenos. The population of the district, including Los Feliz, as of the 2000 census was 167,664 and the median household income was $33,409 in 1999.

As a portion of the city of Los Angeles, Hollywood does not have its own municipal government, but does have an official, appointed by the Hollywood Chamber of Commerce, who serves as an honorary "Mayor of Hollywood" for ceremonial purposes only. Johnny Grant held this position for decades, until his death on January 9, 2008.

Hollywood has become an iconic name for film industry so that various other locations associated with film industry are nicknamed with a blend of the name Hollywood along with the location of that film industry. A well known example for such a name is Bollywood for the film industry of Bombay, India. Most such names start with the first letter(s) of the location and end in the "-ollywood". See Hollywood-inspired names.