Trousdale Estates is a neighborhood of Beverly Hills, California, located in the foothills of the Santa Monica mountains. It was developed in the 1950s and 1960s and is named after Paul Trousdale, a real estate developer.
The grounds originally belonged to Mrs. Lucy Smith Doheny Battson, wife of Edward L. Doheny, Jr. (1893–1929), son of oil tycoon Edward L. Doheny (1856–1935); were known as the Doheny Ranch or the Doheny Estate; and included the Greystone Mansion, which is now a United States Historical Site. In 1954, Paul Trousdale (1915–1990) purchased the grounds, while the mansion was purchased by industrialist Henry Crown (1896–1990). Shortly after, Trousdale convinced the Beverly Hills City Council to add the neighborhood to the city, which they accepted, and he renamed it the Trousdale Estates.
Trousdale first built 532 original lots, all subject to strict regulations devised by the Architectural Committee, including how high roofs could be. Early houses were designed by renowned architects Wallace Neff (1895–1982), Paul R. Williams (1894–1980), A. Quincy Jones (1913–1979), Frank Lloyd Wright (1867–1959) and Harold Levitt (1922–2003). Allen Siple (1900–1973) acted as the supervising architect.
By 1981, some houses were remodeled, blocking their neighbors' views. As a result, after some consultation in 1987 the Trousdale Estates Homeowners Association, a non-profit organization, and the City of Beverly Hills implemented the Trousdale Ordinance to preserve the neighborhood. There are also "view protections" that protect a resident's view from neighboring trees, outlined in the Trousdale Ordinance.  The City of Beverly Hills now enforces these building codes and view protections.
The 410-acre neighborhood has 24/7 security patrol cars with armed guards. In addition, the Beverly Hills Police Department has increased its day and night rounds in the neighborhood with dedicated patrols. 
Loma Vista is the main thoroughfare in Trousdale Estates.
Celebrity residents have included Elvis Presley, Frank Sinatra, Dean Martin, Tony Curtis, Ray Charles, Howard Hughes, and Groucho Marx. President Richard Nixon lived in the neighborhood. When Nixon, who had just been Vice President from 1953 to 1961 under President Dwight D. Eisenhower, purchased his residence, Frank McCullogh of the Los Angeles Times reported that he had only paid $90,000 for a house whose real price was $300,000 as the developers believed his name would add prestige to the neighborhood.
More recently, Jennifer Aniston, David Spade, Zoë de Givenchy, Vera Wang, John Rich, Jane Fonda, Richard Perry, Markus Persson, Ringo Starr, Simon Cowell, and Charlie Puth have lived in the neighborhood.
Jeffery Katzenberg, who co-founded DreamWorks, bought a $35 million, 8,704-square-foot mansion in Trousdale Estates from Simon Ramo, an American physicist, engineer, and business leader.  Katzenberg hosted fundraisers for President Barack Obama at this mansion. 
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- Myrna Oliver, Lucy Doheny Battson, 100; Family Made Fortune in Oil, Los Angeles Times, June 22, 1993
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- Mary Ann Bonino, The Doheny Mansion: A Biography of a Home, 2008, p. 65 
- Don Sloper, Los Angeles's Chester Place, Arcadia Publishing, 2007, p. 65 
- Erika Riggs, Elvis' Beverly Hills home goes on the market, NBC
- Marc Wanamaker, Early Beverly Hills, Arcadia Publishing, 2005, p. 51 
- Ann Herold, Trousdale Estates, Los Angeles, January 09, 2012
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- Marc Wanamaker, Beverly Hills, (Ca): 1930-2005, Arcadia Publishing, 2006, p. 39 
- Alan Hess, Forgotten modern: California houses 1940–1970, Layton, Utah: Gibbs Smith, 2007, pp. 262–264 
- Jeff Burbank, Development Dispute in Trousdale Estates: Homeowners Split on Proposed Limits, Los Angeles Times, February 15, 1987
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- Max Feeney, Nixon at the Movies: A Book about Belief, Chicago, Illinois: University of Chicago Press, 2012, p. 38 
- Tiffany Hsu, Elvis Presley's Beverly Hills estate for sale at $13 million, Los Angeles Times, October 11, 2012
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- Lauren Beale, Hot Property: TV and film director John Rich lists Trousdale Estates home at $11.9 million, Los Angeles Times, June 06, 2011
- Hot Property: Jane Fonda, Richard Perry, Los Angeles Times
- "Charlie Puth picks up $9m mid-century modern mansion in Beverly Hills". Mail Online. Retrieved 2017-12-02.
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- "Inside Jeffrey Katzenberg's Final Fundraiser for President Obama". The Hollywood Reporter. Retrieved 2019-09-03.
- "Uber Co-Founder Buys Record-Breaking $72 Mill Beverly Hills Home". Beverly Hills, CA Patch. 2019-07-03. Retrieved 2019-09-03.
- Haldeman, Peter (October 20, 2013). "Trousdale, Los Angeles's Forgotten Architectural Mecca, Makes a Comeback". T: The New York Times Style Magazine. Retrieved November 4, 2013.