Beverly Hills is a city in Los Angeles County, California. Located within 5.71 square miles (14.8 km2) and surrounded by the cities of Los Angeles and West Hollywood, it had a population of 34,109 at the 2010 census and an estimated population of 33,792 in 2019.The city is home to many celebrities, luxury hotels, and the Rodeo Drive shopping district. Originally a Mexican ranch where lima beans were grown, Beverly Hills was incorporated in 1914 by a group of investors who had failed to find oil, but found water instead and eventually decided to develop it into a town.

Los Angeles (US: (listen) lawss AN-jəl-əs; Tongva: Tovaangar; Spanish: Los Ángeles; "The Angels"), often spoken and written as its initialism, L.A., is the largest city in California. With a 2020 population of 3,898,747, it is the second-largest city in the United States, after New York City, and the third-largest city in North America, after Mexico City and New York City. Los Angeles is known for its Mediterranean climate, ethnic and cultural diversity, Hollywood entertainment industry, and its sprawling metropolitan area. Los Angeles lies in a basin in southern California, adjacent to the Pacific Ocean, with mountains as high as 10,000 feet (3,000 m), and deserts. The city, which covers about 469 square miles (1,210 km2), is the seat of Los Angeles County, the most populous county in the United States. The Los Angeles metropolitan area (MSA) is home to a population of 13.1 million, making it the second-largest metropolitan area in the nation after that of New York. Greater Los Angeles includes metro Los Angeles as well as the Inland Empire and Ventura County. It is the second most populous U.S. combined statistical area, also after New York, with a 2015 estimate of 18.7 million people.Home to the Chumash and Tongva, the area that became Los Angeles was claimed by Juan Rodríguez Cabrillo for Spain in 1542. The city was founded on September 4, 1781, under Spanish governor Felipe de Neve, on the village of Yaanga. It became a part of Mexico in 1821 following the Mexican War of Independence. In 1848, at the end of the MexicanAmerican War, Los Angeles and the rest of California were purchased as part of the Treaty of Guadalupe Hidalgo, and thus became part of the United States. Los Angeles was incorporated as a municipality on April 4, 1850, five months before California achieved statehood. The discovery of oil in the 1890s brought rapid growth to the city. The city was further expanded with the completion of the Los Angeles Aqueduct in 1913, which delivers water from eastern California. Los Angeles has a diverse and robust economy, and hosts businesses in a broad range of professional and cultural fields. It also has the busiest container port in the Americas. In 2018, the Los Angeles metropolitan area had a gross metropolitan product of over $1.0 trillion, making it the city with the third-largest GDP in the world, after Tokyo and New York City. Los Angeles hosted the 1932 and 1984 Summer Olympics and will host the 2028 Summer Olympics.

Santa Monica (Spanish for 'Saint Monica') is a beachfront city in western Los Angeles County, California, United States. Situated on Santa Monica Bay, it is bordered on five sides by different neighborhoods of the city of Los Angeles: Pacific Palisades to the north, Brentwood on the northeast, West Los Angeles on the east, Mar Vista on the southeast, and Venice on the south. The 2010 U.S. Census population was 89,736. Due to a favorable climate and close proximity to Los Angeles, Santa Monica became a famed resort town by the early 20th century attracting many celebrities, like Marion Davies, to build magnificent beach front homes on Pacific Coast Highway (PCH). The city has experienced a boom since the late 1980s through the revitalization of its downtown core, significant job growth and increased tourism. Popular tourists sites include Pacific Park on the Santa Monica Pier and Palisades Park atop a bluff over the Pacific Ocean. Like other coastal beach communities, coastal erosion due to coastal infrastructure and high human usage is an increasing challenge, and will become worse due to sea level rise. Santa Monica has a history of developing environmental and sustainability strategies, with the most recent focus on community-wide carbon neutrality by 2050 or sooner.

Marina del Rey is an unincorporated seaside community in Los Angeles County, California, with an eponymous harbor that is a major boating and water recreation destination of the greater Los Angeles area. The port is North America's largest man-made small-craft harbor and is home to approximately 5,000 boats. The area is a popular tourism destination for both land and water activities such as paddle board and kayak rentals, dining cruises, and yacht charters. Land activities include bicycling on several bicycle paths, walking paths along the waterfront, and birdwatching (birding). Wildlife watching opportunities include California sea lions and harbor seals. Dolphins and whales occasionally visit the deeper waters of harbor. This Westside locale is approximately 4 miles (6.4 km) south of Santa Monica, 4 miles (6.4 km) north of Los Angeles International Airport, and 12.5 miles (20.1 km) west-southwest of Downtown Los Angeles. The harbor is owned by Los Angeles County and managed by the Department of Beaches and Harbors (DBH), but the waters are environmentally regulated by state government and federal government through their many agencies and departments with overlapping oversight. The Los Angeles Times said in a 1997 editorial that the harbor is "perhaps the county's most valuable resource". The population was 8,866 at the 2010 census. For statistical purposes, the United States Census Bureau has defined Marina del Rey as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name; for example, the 90292 ZIP code includes all of Marina del Rey and portions of neighboring Los Angeles, such as Del Rey, and has a population of 21,576, more than double that of the CDP. Many residents of the 90292 ZIP code consider themselves to live in Marina del Rey even if they in fact live outside the official boundaries of the CDP.