Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States, with 9,861,224 residents estimated in 2022. Its population is greater than that of 40 individual U.S. states. Comprising 88 incorporated cities and many unincorporated areas within a total area of 4,083 square miles (10,570 km2), it is home to more than a quarter of Californians and is one of the most ethnically diverse U.S. counties. The county's seat, Los Angeles, is the second most populous city in the United States, with about 3.9 million residents. Being the home of the U.S. motion-picture industry, since its inception in the early 20th century, has given the county global prominence.
Charter Oak is a census-designated place (CDP) in Los Angeles County, California, approximately 26 miles (42 km) east of downtown Los Angeles. The population was 9,310 at the 2010 census, up from 9,027 at the 2000 census.
Covina is a city in the San Gabriel Valley region of Los Angeles County, California, United States, about 22 miles (35 km) east of Downtown Los Angeles The population was 51,268 according to the 2020 census, up from 47,796 at the 2010 census. The city's slogan, "One Mile Square and All There", was coined when the incorporated area of the city was only one square mile (2.6 km2).
Diamond Bar is a city in eastern Los Angeles County, California, United States. At the 2010 census it had a population of 55,544, and in 2019 the population was estimated to be 55,720. It is named after the "diamond over a bar" branding iron registered in 1918 by ranch owner Frederic E. Lewis (1884–1963). The city features a public Los Angeles County golf course.
The City of Industry is a city in the San Gabriel Valley, in eastern Los Angeles County, California, United States. The city is almost entirely industrial, containing over 3,000 businesses employing 67,000 people, with only 264 residents as of the 2020 census, making it the third least populous city in the state. It was incorporated on June 18, 1957, and has become the economic hub for the San Gabriel Valley.
Pomona is a city in eastern Los Angeles County, California, United States. Pomona is located in the Pomona Valley, between the Inland Empire and the San Gabriel Valley. At the 2020 census, the city's population was 151,713. The main campus of California State Polytechnic University, Pomona, also known as Cal Poly Pomona, lies partially within Pomona's city limits, with the rest being located in the neighboring unincorporated community of Ramona.
Rowland Heights is an unincorporated area in and below the Puente Hills in the San Gabriel Valley, in Los Angeles County, California, United States. The population was 48,231 at the 2020 census. Rowland Heights is in the Los Angeles metropolitan area and represented by the County of Los Angeles and is the largest census designated place in Los Angeles County by area and the county's fourth largest CDP by population. The area has a high Taiwanese population and was known as “Little Taipei” in the 1980s and 1990s, when it saw an influx of wealthy immigrants from Taiwan.
San Dimas is a city in the San Gabriel Valley of Los Angeles County, California, United States. At the 2020 census, its population was 34,924. It historically took its name from San Dimas Canyon in the San Gabriel Mountains above the northern section of present-day San Dimas.
South San Jose Hills is an unincorporated community and census-designated place in Los Angeles County, California, United States. The population was 20,551 at the 2010 census, up from 20,218 at the 2000 census.
Walnut is a city in the eastern part of Los Angeles County in the U.S. state of California. According to the 2010 census, the city had a population of 29,172, and the population was estimated to be 29,685 in 2019.
West Covina is a suburban city in Los Angeles County, California, United States. Located 19 miles (31 km) east of Downtown Los Angeles in the eastern San Gabriel Valley, it is part of Greater Los Angeles. The population for the city was 106,098 at the 2010 census.
West Puente Valley is an unincorporated community and census-designated place in Los Angeles County, California, USA, northwest of La Puente. The population was 22,636 at the 2010 census, up from 22,589 at the 2000 census. The community is probably named for its location related to the city of La Puente.
Hacienda Heights is an unincorporated suburban community in Los Angeles County, California, United States. As of the 2020 census, the community had a total population of 54,191, up from 54,038 at the 2010 census. For statistical purposes, the Census Bureau has defined Hacienda Heights as a census designated place (CDP). It is the second largest CDP in Los Angeles County by area, behind Topanga, and the county's fourth largest CDP by population.
The San Gabriel Valley, often referred to by its initials as SGV, is one of the principal valleys of Southern California, lying immediately to the east of the eastern limits of the city of Los Angeles and occupying the vast majority of the southeastern part of Los Angeles County. Surrounding landforms and other features include the following:
California's 38th congressional district is a congressional district in the U.S. state of California based in suburban eastern Los Angeles County and Orange County, California. The district is currently represented by Democrat Linda Sánchez.
Valley Boulevard is a street in Southern California, running east from Los Angeles to Pomona, where it becomes Holt Boulevard, and a continuation from Fontana to Colton. It generally parallels Interstate 10 (I-10) and State Route 60 (CA 60), and is the original alignment of U.S. Route 60 (US 60). The present north end of I-710 is at Valley Boulevard in Los Angeles, just west of Alhambra.
California's 31st congressional district is a congressional district in Los Angeles County, in the U.S. state of California. The district is located in the San Gabriel Valley.
The San Jose Hills are a part of the Transverse Ranges in eastern Los Angeles County, California, marking the border between the San Gabriel Valley and the Pomona Valley. It includes portions of Covina, West Covina, Walnut, Pomona, and San Dimas. To the south, the valley of San Jose Creek separates the San Jose Hills from the Puente Hills and Chino Hills.
The Upland–San Bernardino Line was an interurban line operated by the Pacific Electric Railway between Downtown Los Angeles and San Bernardino, California. This line also had shorter service that terminated before the end of the line at Baldwin Park, Covina, and San Dimas. Though service along this line in its entirety was discontinued in November 1941, it stands as the fourth-longest rapid transit line in American history, after the Sacramento Northern Chico and Colusa services, and the Pacific Electric's own Riverside–Rialto Line.
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