Bel Air is a wealthy and prominent faux-gated residential community in the hills of Westside of the city of Los Angeles, California, USA. Together with Beverly Hills and Holmby Hills it forms the Platinum Triangle of Los Angeles neighborhoods.  Homes and estates in the Platinum Triangle are among the most expensive in the United States.
Bel Air is situated about 17 miles (27 km) west of downtown Los Angeles  and includes some of the foothills of the Santa Monica Mountains. It borders the north side of UCLA along Sunset Boulevard. At the heart of the community sits the exclusive Bel Air Country Club and the Hotel Bel-Air. The community was founded in 1923 by Alphonzo E. Bell, Sr.,.
Residences in Bel Air tend to be private and hidden from the winding roads of the community. Most homes are not visible from the street, as they are hidden by well-manicured hedges and gates. Residences range from modest ranch style houses, to multi-story configurations, to grand mansions. While some houses in Bel Air seem quite modest from the outside, often lying only six feet from the street, they have large grounds. In general, the higher up the mountain, the smaller the building lot and more modest the homes; however, those residences along roads such as Stradella Road have magnificent views f the Los Angeles basin and Catalina Island. The most desirable houses are right off the main entrances of Bel Air and the country club entrance for these houses have both the views of the Bel-Air Country Club and the rest of Los Angeles. Lower Bel Air houses can sell for over $50 million. Many families prefer lower Bel Air because of its proximity to Sunset Boulevard, a major thoroughfare.
Multi-family housing is not permitted within the community, and strict ordinances regarding architectural styles, landscaping, and lot sizes exist to preserve the quality of life and character of Bel Air. Unlike Beverly Hills, Bel Air has no residential sidewalks in attempts to discourage the public from walking around the community. Bel Air is also heavily patrolled by local security companies to reinforce the safety and privacy of its residents.
resident Ronald Reagan lived at 668 St. Cloud Road in Bel Air from his etirement as President in 1989 until his death in 2004, and former First Lady Nancy Reagan continues to live there and attends nearby Bel Air Presbyterian Church
Located in Bel-Air is the UCLA Hannah Carter Japanese Garden, which was inspired by the gardens of Kyoto. Some of the structures, including the main gate, garden house, bridges, and shrine, were built in Japan and reassembled at the garden.
As of the census of 2000, there were 7,928 people in the neighborhood. The racial makeup of the neighborhood was 86.24% White, 1.93% Black, 0.06% Native American, 6.84% Asian, 0.04% Pacific Islander, 1.30% from other races, and 3.59% from two or more races, while 4.65% of the population were Hispanic.
It lies within the 5th city council district, represented (as of 2007) by Jack Weiss. It is located in the 90077 (Bel Air Estates & Beverly Glen) Zip Code, both of which are part of the city of Los Angeles. Of several entrances, there are two main ones: The East Gate at Beverly Glen and Sunset Boulevards, and the West Gate at Bellagio Road and Sunset Boulevard, opposite an entrance for UCLA.
Los Angeles Fire Department Station 71 is in the area.
Los Angeles Police Department operates the West Los Angeles Community Police Station at 1663 Butler Avenue, 90025, serving the neighborhood.
The community is within the Los Angeles Unified School District. The area is within Board District 4. As of 2008 Marlene Canter represents the district. Canter announced that she will not seek re-election after her term expires in June 2009. The area is zoned to Warner Avenue Elementary School, Emerson Middle School, and University High School.  Some Bel Air area homes are within the Roscomare Road Elementary School attendance area.
Private schools in the Bel Air area include:
- John Thomas Dye School (K?6) 
- Marymount High School 
- Westland School (K-6)
- Berkeley Hall (Christian Science, K-8)
- Stephen S. Wise Temple Elementary (Reform Jewish; K-6)
- Milken Community High School (Jewish; 7-12).
- The Mirman School (K-8)