The Los Angeles County Museum of Art (LACMA) is an art museum located on Wilshire Boulevard in the Miracle Mile vicinity of Los Angeles. LACMA is on Museum Row, adjacent to the La Brea Tar Pits (George C. Page Museum).

LACMA was founded in 1961, splitting from the Los Angeles Museum of History, Science and Art. Four years later, it moved to the Wilshire Boulevard complex designed by William Pereira. The museum's wealth and collections grew in the 1980s, and it added several buildings beginning in that decade and continuing in subsequent decades.

LACMA is the largest art museum in the western United States. It attracts nearly a million visitors annually. It holds more than 150,000 works spanning the history of art from ancient times to the present. In addition to art exhibits, the museum features film and concert series.

The Los Angeles County Museum of Art was established as a museum in 1961. Prior to this, LACMA was part of the Los Angeles Museum of History, Science and Art, founded in 1913 in Exposition Park near the University of Southern California.

Edward W. Carter helped orchestrate the fundraising effort for LACMA in response to J. Paul Getty's increasing reluctance to donate any more artworks to Los Angeles County. Getty had donated a few excellent artworks such as the Ardabil Carpet and Rembrandt's Portrait of Martin Looten, but then became aware of their shabby and disorganized presentation in the county's aging multipurpose museum and chose to establish his own art museum next to his house.

Howard F. Ahmanson, Sr., Anna Bing Arnold and Bart Lytton were the first principal patrons of the new county art museum. Ahmanson made the lead donation of $2 million, convincing the museum board that sufficient funds could be raised to establish the new museum. In 1965 the museum moved to a new Wilshire Boulevard complex as an independent, art-focused institution, the largest new museum to be built in the United States after the National Gallery of Art.

The museum, built in a style similar to Lincoln Center and the Los Angeles Music Center, consisted of three buildings: the Ahmanson Building, the Bing Center, and the Lytton Gallery (renamed the Frances and Armand Hammer Building in 1968). The board selected LA architect William Pereira over the directors' recommendation of Ludwig Mies van der Rohe for the buildings. According to a 1965 Los Angeles Times story, the total cost of the three buildings was $11.5 million. Construction began in 1963, and was undertaken by the Del E. Webb Corporation. Construction was completed in early 1965. At the time, the Los Angeles Music Center and LACMA were concurrent large civic projects which vied for attention and donors in Los Angeles. When the museum opened, the buildings were surrounded by reflecting pools, but they were filled in and covered over when tar from the adjacent La Brea Tar Pits began seeping in.

Money poured into LACMA during the boom years of the 1980s, a reportedly $209 million in private donations during director Earl Powell's tenure. To house its growing collections of modern and contemporary art and to provide more space for exhibitions, the museum hired the architectural firm of Hardy Holzman Pfeiffer Associates to design its $35.3-million, 115,000-square-foot (10,700 m²) Robert O. Anderson Building for 20th-century art, which opened in 1986 (renamed the Art of the Americas Building in 2007). In the far-reaching expansion, museum-goers henceforth entered through the new partially roofed central court, nearly 1-acre (0.40 ha) of space bounded by the museum's four buildings.