Population density is a measurement of population per unit area or unit volume. It is applied to living organisms, most of the time to humans, it is a key geographical term. In simple terms population density refers to the number of people living in an area per kilometer square. Population density is population divided by total land water volume, as appropriate. Low densities may lead to further reduced fertility; this is called the Allee effect after the scientist. Examples of the causes in low population densities include: Increased problems with locating sexual mates Increased inbreeding For humans, population density is the number of people per unit of area quoted per square kilometer or square mile; this may be calculated for a county, country, another territory or the entire world. The world's population is around 7,500,000,000 and Earth's total area is 510,000,000 square kilometers. Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2. If only the Earth's land area of 150,000,000 km2 is taken into account human population density is 50 per km2.
This includes all continental and island land area, including Antarctica. If Antarctica is excluded population density rises to over 55 people per km2. However, over half of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, population tends to cluster around seaports and fresh-water sources. Thus, this number by itself does not give any helpful measurement of human population density. Several of the most densely populated territories in the world are city-states and dependencies; these territories have a small area and a high urbanization level, with an economically specialized city population drawing on rural resources outside the area, illustrating the difference between high population density and overpopulation The potential to maintain the agricultural aspects of deserts is limited as there is not enough precipitation to support a sustainable land. The population in these areas are low. Therefore, cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.
Cities with high population densities are, by some, considered to be overpopulated, though this will depend on factors like quality of housing and infrastructure and access to resources. Most of the most densely populated cities are in Southeast Asia, though Cairo and Lagos in Africa fall into this category. City population and area are, however dependent on the definition of "urban area" used: densities are invariably higher for the central city area than when suburban settlements and the intervening rural areas are included, as in the areas of agglomeration or metropolitan area, the latter sometimes including neighboring cities. For instance, Milwaukee has a greater population density when just the inner city is measured, the surrounding suburbs excluded. In comparison, based on a world population of seven billion, the world's inhabitants, as a loose crowd taking up ten square feet per person, would occupy a space a little larger than Delaware's land area; the Gaza Strip has a population density of 5,046 pop/km.
Although arithmetic density is the most common way of measuring population density, several other methods have been developed to provide a more accurate measure of population density over a specific area. Arithmetic density: The total number of people / area of land Physiological density: The total population / area of arable land Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Demography Human geography Idealized population Optimum population Population genetics Population health Population momentum Population pyramid Rural transport problem Small population size Distance sampling List of population concern organizations List of countries by population density List of cities by population density List of city districts by population density List of English districts by population density List of European cities proper by population density List of United States cities by population density List of islands by population density List of U.
S. states by population density List of Australian suburbs by population density Selected Current and Historic City, Ward & Neighborhood Density Duncan Smith / UCL Centre for Advanced Spatial Analysis. "World Population Density". Exploratory map shows data from the Global Human Settlement Layer produced by the European Commission JRC and the CIESIN Columbia University
Abel Stearns was a trader who came to the Pueblo de Los Angeles, Alta California in 1829 and became a major landowner, cattle rancher and one of the area's wealthiest citizens. Stearns was born in Lunenburg, the son of Elizabeth and Levi Stearns, a farmer, his parents were both from families. Stearns went to Mexico in about 1826. In 1829, Stearns emigrated to Monterey, California settled in the Pueblo de los Ángeles, present day Los Angeles, California, he obtained a government concession to build a warehouse at the nearest seaport. He established a stagecoach route connecting San Pedro Bay with the Los Angeles pueblo. In 1831, he built a three-story flour mill on Los Angeles. Soon, Stearns became one of the most influential citizens of the pueblo. In 1842 Stearns bought his first rancho, the 28,000-acre Rancho Los Alamitos between Los Angeles and the harbor. However, there was a drought between 1862 and 1864, said to have resulted in the death of 50,000 cattle on Stearns land alone. Stearns mortgaged the rancho to Michael Reese, who purchased it at a sheriff's sale.
Reese's estate was sold to John W. Bixby and Isaias W. Hellman, a founder of the Farmers and Merchants Bank. In 1842 Stearns made the first shipment to the U. S. Mint of California gold on record. On July 8, 1843, his package of 1,843 ounces of placer gold valued at $19 an ounce was deposited in the Philadelphia Mint by Alfred Robinson. Following the Mexican-American War, Stearns represented Los Angeles to the US military government of California, 1848-1850, he was a delegate to the 1849 California Constitutional Convention, representing the district of Los Angeles. By 1860, Stearns was the most important land owner in Southern California, owned Rancho La Habra, Rancho Los Coyotes, Rancho San Juan Cajón de Santa Ana, Rancho Las Bolsas, Rancho La Bolsa Chica, Rancho Jurupa and Rancho La Sierra. Stearns was hit causing the loss of thousands of cattle. By 1868 Stearns had suffered such financial reverses that he mortgaged all his ranch assets in what were Los Angeles and San Bernardino counties. To obtain the necessary operating capital, he formed a real estate sales partnership, with Alfred Robinson and four San Francisco investors.
Polhemus, Edward Martin. He turned over 177,796 acres including all but one of his ranchos; the era of the large cattle ranchos was on the way out. In its place came agriculture, as ranchos were broken up and sold in 40-acre farms and ranches; the Robinson Trust acted as sales agents for the subdivisions. In order to gain maximum coverage for their campaign, they linked themselves to the California Immigrant Union and helped guide that organization’s sales pitches. Despite considerable friction between Stearns and the other members of the trust, the Robinson Trust succeeded. By 1870 Stearns was out from under the debts incurred by the drought of the 1860s and was on his way to accumulating yet another fortune. Stearns was nicknamed "Cara de Caballo" because of his long-jawed countenance. In 1841, he married Arcadia Bandini of the wealthy Bandini family, they entertained at their Los Angeles home, the historic Don Abel Stearns House. Stearns died on August 23, 1871, at age 72 in the Grand Hotel, San Francisco, is interred at Calvary Cemetery, Los Angeles.
List of pre-statehood mayors of Los Angeles, California History of Los Angeles Ranchos of California List of Ranchos of California
A Mediterranean climate or dry summer climate is characterized by rainy winters and dry summers, with less than 40 mm of precipitation for at least three summer months. While the climate receives its name from the Mediterranean Basin, these are located on the western coasts of continents, between 30 and 45 degrees north and south of the equator between oceanic climates towards the poles, semi-arid and arid climates towards the equator. In essence, due to the seasonal shift of the subtropical high-pressure belts with the apparent movement of the Sun, a Mediterranean climate is an intermediate type between these other climates, with winters warmer and drier than oceanic climates and summers imitating sunny weather in semi-arid and arid climates; the resulting vegetation of Mediterranean climates are the garrigue or maquis in the Mediterranean Basin, the chaparral in California, the fynbos in South Africa, the mallee in Australia, the matorral in Chile. Areas with this climate are where the so-called "Mediterranean trinity" of agricultural products have traditionally developed: wheat and olive.
Most large, historic cities of the Mediterranean basin lie within Mediterranean climatic zones, including Algiers, Beirut, İzmir, Marseille, Rome and Valencia. Examples of major cities with Mediterranean climates that lie outside of the historic Mediterranean basin include major examples as Adelaide, Cape Town, Dushanbe, Los Angeles, Perth, San Francisco and Victoria. Under the Köppen climate classification, "hot dry-summer" climates and "cool dry-summer" climates are referred to as "Mediterranean". Under the Köppen climate system, the first letter indicates the climate group. Temperate climates or "C" zones have an average temperature above 0 °C, but below 18 °C, in their coolest months; the second letter indicates the precipitation pattern. Köppen has defined a dry summer month as a month with less than 30 mm of precipitation and with less than one-third that of the wettest winter month. Some, use a 40 mm level; the third letter indicates the degree of summer heat: "a" represents an average temperature in the warmest month above 22 °C, while "b" indicates the average temperature in the warmest month below 22 °C.
Under the Köppen classification, dry-summer climates occur on the western sides of continents. Csb zones in the Köppen system include areas not associated with Mediterranean climates but with Oceanic climates, such as much of the Pacific Northwest, much of southern Chile, parts of west-central Argentina, parts of New Zealand. Additional highland areas in the subtropics meet Cs requirements, though they, are not associated with Mediterranean climates, as do a number of oceanic islands such as Madeira, the Juan Fernández Islands, the western part of the Canary Islands, the eastern part of the Azores. Under Trewartha's modified Köppen climate classification, the two major requirements for a Cs climate are revised. Under Trewartha's system, at least eight months must have average temperatures of 10 °C or higher, the average annual precipitation must not exceed 900 mm. Thus, under this system, many Csb zones in the Köppen system become Do, the rare Csc zones become Eo, with only the classic dry-summer to warm winter, low annual rainfall locations included in the Mediterranean type climate.
During summer, regions of Mediterranean climate are influenced by cold ocean currents which keep the weather in the region dry and pleasant. Similar to desert climates, in many Mediterranean climates there is a strong diurnal character to daily temperatures in the warm summer months due to strong heating during the day from sunlight and rapid cooling at night. In winter, Mediterranean climate zones are no longer influenced by the cold ocean currents and therefore warmer water settles near land and causes clouds to form and rainfall becomes much more likely; as a result, areas with this climate receive all of their precipitation during their winter and spring seasons, may go anywhere from 3 to 6 months during the summer without having any significant precipitation. In the lower latitudes, precipitation decreases in both the winter and summer because they are closer to the Horse latitudes, thus bringing smaller amounts of rain. Toward the polar latitudes, total moisture increases; the rainfall tends to be more evenly distributed throughout the year in Southern Europe, while in the Eastern Mediterranean and in Southern California the summer is nearly or dry.
In places where evapotranspiration is higher, steppe climates tend to prevail, but still follow the weather pattern of the Mediterranean climate. The majority of the regions with Mediterranean climates have mild winters and warm summers; however winter and summer temperatures can vary between different regions with a Mediterranean climate. For instance, in the case of winters and Los Angeles experience mild temperatures in the winter, with frost and snowfall unknown, whereas Tashkent has colder winters with annual frosts and snowfall. Or to consider summer, Athens experiences rather high temperatures in that season. In contrast, San Francisco has cool summers with daily highs around 21 °C due to
A ZIP Code is a postal code used by the United States Postal Service in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan; the basic format consists of five digits. An extended ZIP+4 code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that reference a more specific location; the term ZIP Code was registered as a servicemark by the U. S. Postal Service, but its registration has since expired; the early history and context of postal codes began with postal district/zone numbers. The United States Post Office Department implemented postal zones for numerous large cities in 1943. For example: The "16" was the number of the postal zone in the specific city. By the early 1960s, a more organized system was needed, non-mandatory five-digit ZIP Codes were introduced nationwide on July 1, 1963; the USPOD issued its Publication 59: Abbreviations for Use with ZIP Code on October 1, 1963, with the list of two-letter state abbreviations which are written with both letters capitalized.
An earlier list in June had proposed capitalized abbreviations ranging from two to five letters. According to Publication 59, the two-letter standard was "based on a maximum 23-position line, because this has been found to be the most universally acceptable line capacity basis for major addressing systems", which would be exceeded by a long city name combined with a multi-letter state abbreviation, such as "Sacramento, Calif." along with the ZIP Code. The abbreviations have remained unchanged, with the exception of Nebraska, changed from NB to NE in 1969 at the request of the Canadian postal administration, to avoid confusion with the Canadian province of New Brunswick. Robert Moon is considered the father of the ZIP Code; the post office only credits Moon with the first three digits of the ZIP Code, which describe the sectional center facility or "sec center." An SCF is a central mail processing facility with those three digits. The fourth and fifth digits, which give a more precise locale within the SCF, were proposed by Henry Bentley Hahn Sr.
The SCF sorts mail to all post offices with those first three digits in their ZIP Codes. The mail is sorted according to the final two digits of the ZIP Code and sent to the corresponding post offices in the early morning. Sectional centers do not deliver mail and are not open to the public, most of their employees work the night shift. Mail picked up at post offices is sent to their own SCF in the afternoon, where the mail is sorted overnight. In the case of large cities, the last two digits coincide with the older postal zone number thus: In 1967, these became mandatory for second- and third-class bulk mailers, the system was soon adopted generally; the United States Post Office used a cartoon character, which it called Mr. ZIP, to promote the use of the ZIP Code, he was depicted with a legend such as "USE ZIP CODE" in the selvage of panes of postage stamps or on the covers of booklet panes of stamps. In 1971 Elmira Star-Gazette reporter Dick Baumbach found out the White House was not using a ZIP Code on its envelopes.
Herb Klein, special assistant to President Nixon, responded by saying the next printing of envelopes would include the ZIP Code. In 1983, the U. S. Postal Service introduced an expanded ZIP Code system that it called ZIP+4 called "plus-four codes", "add-on codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an individual high-volume receiver of mail, a post office box, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery. However, initial attempts to promote universal use of the new format met with public resistance and today the plus-four code is not required. In general, mail is read by a multiline optical character reader that instantly determines the correct ZIP+4 Code from the address—along with the more specific delivery point—and sprays an Intelligent Mail barcode on the face of the mail piece that corresponds to 11 digits—nine for the ZIP+4 Code and two for the delivery point.
For Post Office Boxes, the general rule is. The add-on code is one of the following: the last four digits of the box number, zero plus the last three digits of the box number, or, if the box number consists of fewer than four digits, enough zeros are attached to the front of the box number to produce a four-digit number. However, there is no uniform rule, so the ZIP+4 Code must be looked up individually for each box; the ZIP Code is translated into an Intelligent Mail barcode, printed on the mailpiece to make it easier for automated machines to sort. A barcode can be printed by the sender, it is better to let the post office put one on. In general, the post office uses OCR technology, though in some cases a human might have to read and enter the address. Customers who send bulk mail can get a discount on postage if they have printed the barcode themselves and have presorted the mai
Orange County, California
Orange County is located in the Los Angeles metropolitan area in the U. S. state of California. As of the 2010 census, the population was 3,010,232, making it the third-most populous county in California, the sixth-most populous in the United States, more populous than 21 U. S. states. Its county seat is Santa Ana, it is the second most densely populated county behind San Francisco County. The county's four largest cities by population, Santa Ana and Huntington Beach, each have a population exceeding 200,000. Several of Orange County's cities are on the Pacific Ocean western coast, including Huntington Beach, Newport Beach, Laguna Beach, Dana Point, San Clemente. Orange County is included in Metropolitan Statistical Area. Thirty-four incorporated towns and cities are in the county. Anaheim was the first city, incorporated in 1870 when the region was still part of neighboring Los Angeles County. Whereas most population centers in the United States tend to be identified by a major city with a large downtown central business district, Orange County has no single major downtown / CBD or dominant urban center.
Santa Ana, Costa Mesa, Irvine all have smaller high-rise CBDs, other, older cities like Anaheim, Huntington Beach, Orange have traditional American downtowns without high-rises. The county's northern and central portions are urbanized and dense, despite the prevalence of the single-family home as a dominant land use, its southern portion is more suburban, with limited urbanization. There are several "edge city"-style developments, such as Irvine Business Center, Newport Center, South Coast Metro. Orange County is part of the "Tech Coast"; the county is a tourist center, with attractions like Disneyland, Knott's Berry Farm, several popular beaches along its more than 40 miles of coastline. Throughout the 20th century and up until 2016, it was known for its political conservatism and for being a bastion for the Republican Party, with a 2005 academic study listing three Orange County cities as among America's 25 most conservative. However, the county's changing demographics have resulted in a shift in political alignments.
In 2016, Hillary Clinton became the first Democrat since 1936 to carry Orange County in a presidential election and in the 2018 midterm elections the Democratic Party gained control of every Congressional seat in the county. Members of the Tongva, Juaneño, Luiseño Native American groups long inhabited the area. After the 1769 expedition of Gaspar de Portolà, a Spanish expedition led by Junipero Serra named the area Valle de Santa Ana. On November 1, 1776, Mission San Juan Capistrano became the area's first permanent European settlement. Among those who came with Portolá were José Manuel Nieto and José Antonio Yorba. Both these men were given land grants—Rancho Los Nietos and Rancho Santiago de Santa Ana, respectively; the Nieto heirs were granted land in 1834. The Nieto ranches were known as Rancho Los Alamitos, Rancho Las Bolsas, Rancho Los Coyotes. Yorba heirs Bernardo Yorba and Teodosio Yorba were granted Rancho Cañón de Santa Ana and Rancho Lomas de Santiago, respectively. Other ranchos in Orange County were granted by the Mexican government during the Mexican period in Alta California.
A severe drought in the 1860s devastated the prevailing industry, cattle ranching, much land came into the possession of Richard O'Neill, Sr. James Irvine and other land barons. In 1887, silver was discovered in the Santa Ana Mountains, attracting settlers via the Santa Fe and Southern Pacific Railroads. After several failed attempts in previous sessions, the California legislature passed a bill authorizing the portion of Los Angeles County south of Coyote Creek to hold a referendum on whether to remain part of Los Angeles County or to secede and form a new county to be named “Orange” as directed by the legislature; such referendum required a 2/3 vote for secession to take place, subsequently on June 4th, 1889, the residents south of Coyote Creek voted 2,509 to 500 in favor of secession. After such referendum, Los Angeles County filed three lawsuits in the courts to stall and stop the secession from occurring, but such attempts were futile. On July 17, 1889, a second referendum was held south of the Coyote Creek to determine if the county seat of the to-be county to be in either Anaheim or Santa Ana, along with an election for every county officer.
In the end, Santa Ana defeated Anaheim in such referendum and elected right leaning officers, with some, including one of the primary lobbyists for the creation of the county, Henry W. Head, elected to the Board of Supervisors while being a member of the Ku Klux Klan, with Head’s son, Horace Head, elected as District Attorney of the soon to be county, known to, as stated by the OC Weekly, threaten “...any Mexicans who walked in front of their homes with shotguns when not burning crosses on front lawns,” along with Horace Head supporting and defending his fathers affiliation with the Ku Klux Klan. With the referendum taken place, the County of Orange was incorporated on August 1st, 1889, as prescribed by state law. Since the date of the incorporation of the county, the only geographical changes to have occurred which affected Orange County was when the County and Los Angeles County agreed to trade land around Coyote Creek to adjust the border of the two counties to conform with city blocks.
The county is said to have been named for the
City of Industry, California
City of Industry, or referred to as Industry, is an industrial suburb of Los Angeles in the San Gabriel Valley region of Los Angeles County, United States. Home to over 3,000 businesses and 67,000 jobs, but only 219 residents according to the 2010 census, the city is entirely industrial, it was incorporated on June 18, 1957, has become the economic hub for the San Gabriel Valley. Industry is located at 34°1′N 117°57′W. According to the United States Census Bureau, the city has a total area of 12.1 square miles, of which 11.8 square miles of it is land and 0.3 square mile of it is water. Industry is a suburb of Los Angeles, 22 miles away from downtown. In 1841, William and Nicolasa Workman, who emigrated with John Rowland and others, received a land grant for Rancho La Puente from the governor of Alta California; the ranch grew to 49,000 acres. The Workmans established themselves as cattle ranchers and did well financially during the Gold Rush supplying fresh beef in the gold fields. Following the discovery of oil by their son on land they owned in the Montebello hills, the Workmans' grandson, Walter P. Temple, his wife, bought the Workman House and surrounding land in 1917.
This property is now known as the Workman and Temple Family Homestead Museum and is a museum in current day City of Industry, free and open to the public. In the 1910's Tract 1343 was created and shows a large portion of today's City boundaries; the City of Industry was incorporated on June 18, 1957. A little under fifteen years from its incorporation, the City of Industry created a general plan to guide its future development and the 1971 document remains in effect today nearly a half-century later; the plan was overseen by planning consultants Gruen Associates, a firm established in 1950 by Austrian-born Victor Gruen, a visionary architect and urban planner. The goals and objectives section of the general plan identified the primary goal of the city as "creating and maintaining an ideal setting for manufacturing and industrial facilities."In 1962, the Industry Chamber of Commerce formed and in 1974, the Workman House became a historical landmark. In 1981, the Industry Hills Expo Center opened as a community multi-purpose event facility.
In 1985, the inaugural Charity Pro Rodeo took place, to raise funds for youth in the San Gabriel Valley. The annual Rodeo still takes place annually. In 1991, in partnership with the Los Angeles County Sheriff's Department, the Youth Activities League was formed to offer sports to at-risk children as an alternative to gang activity. In recognition of the importance of mass transit, the City invested in the development of this Metrolink transit station near the confluence of the 60 and 57 freeways and in 1993, the City of Industry Metrolink Station opened. In 2004, the Environmental Impact Report and Design for the 57/60 Confluence Project was completed; the three-phased program of improvements consists of ramp and interchange reconfigurations as well as the addition of bypass lanes to reduce weaving, resulting in less congestion for the sixth-worst congested and dangerous freeway interchange in the nation. In the California State Legislature, Industry is in the 22nd Senate District, represented by Democrat Susan Rubio, in the 57th Assembly District, represented by Democrat Ian Calderon.
In the United States House of Representatives, Industry is split between California's 32nd congressional district, represented by Democrat Grace Napolitano and California's 39th congressional district, represented by Democrat Gil Cisneros. The Los Angeles County Sheriff's Department operates the Industry Station in Industry; the Los Angeles County Department of Health Services operates the Pomona Health Center in Pomona, serving Industry. City of Industry's City Council members, composed of five members, are elected at large and the elections are held on a Tuesday after the first Monday in June of odd-numbered years; the city is opposing California's Senate Bill 415, which would force it to change election dates to coincide with Los Angeles County and federal elections in even-numbered years, due to a low voter turnout. The city's zoning is devoted to business: 92% is industrial, 8% is commercial; the few residences in the city either existed before incorporation, are on properties adjacent to either Industry Hills Golf Club, Industry Hills Recreation Center or in a small neighborhood adjacent to City Hall.
In addition, there are residents at the El Encanto Healthcare Center, a nursing home owned by the City. The City of Industry has no business taxes and is funded through retail sales tax from shopping centers located within the city limits, property tax on parcels within the City; the city has the highest property tax rate in Los Angeles County, at 1.92%. In addition, there is a revenue-generating hillside hotel resort, known as the Pacific Palms Resort, completely surrounded by the city of La Puente but located in the City of Industry. City of Industry is a popular investment area for Chinese businessmen and the city has emerged as a high-tech import/export center for computer parts, with business links to the Asian marketplace. For convenience many Chinese entrepreneurs and staff live in nearby Rowland Heights, Hacienda Heights, West Covina, Diamond Bar and Walnut; some of the companies with headquarters in Industry are: Arconic Antec Alta Dena AMI ClubWear CSC Enterprise Corp. CyberPowerPC Dacor DUB Emtek Products Hot Topic Gigabyte Technology Called GBT Co, Ltd. as its corporate name in the United States iStarUSA Group ITC-Diligence, Inc.
Los Angeles County, California
Los Angeles County the County of Los Angeles, in the Los Angeles metropolitan area of the U. S. state of California, is the most populous county in the United States, with more than 10 million inhabitants as of 2017. As such, it is the largest non–state level government entity in the United States, its population is larger than that of 41 individual U. S. states. It is the third-largest metropolitan economy in the world, with a Nominal GDP of over $700 billion—larger than the GDPs of Belgium and Taiwan, it has 88 incorporated cities and many unincorporated areas and, at 4,083 square miles, it is larger than the combined areas of Delaware and Rhode Island. The county is home to more than one-quarter of California residents and is one of the most ethnically diverse counties in the U. S, its county seat, Los Angeles, is California's most populous city and the nation's second largest city with about 4 million people. Los Angeles County is one of the original counties of California, created at the time of statehood in 1850.
The county included parts of what are now Kern, San Bernardino, Inyo, Tulare and Orange counties. In 1851 and 1852, Los Angeles County stretched from the coast to the border of Nevada; as the population increased, sections were split off to organize San Bernardino County in 1853, Kern County in 1866, Orange County in 1889. Prior to the 1870s, Los Angeles County was divided into townships, many of which were amalgamations of one or more old ranchos, they were: Azusa El Monte Azusa and El Monte Townships were merged for the 1870 census. City of Los Angeles Los Angeles Township Los Nietos San Jose San Gabriel Santa Ana. For the 1870 census, Annaheim district was enumerated separately. San Juan. San Pedro. Tejon When Kern County was formed, the portion of the township remaining in Los Angeles County became Soledad Township According to the U. S. Census Bureau, the county has an area of 4,751 square miles, of which 4,058 square miles is land and 693 square miles is water. Los Angeles County borders 70 miles of coast on the Pacific Ocean and encompasses mountain ranges, forests, lakes and desert.
The Los Angeles River, Rio Hondo, the San Gabriel River and the Santa Clara River flow in Los Angeles County, while the primary mountain ranges are the Santa Monica Mountains and the San Gabriel Mountains. The western extent of the Mojave Desert begins in the Antelope Valley, in the northeastern part of the county. Most of the population of Los Angeles County is located in the south and southwest, with major population centers in the Los Angeles Basin, San Fernando Valley and San Gabriel Valley. Other population centers are found in the Santa Clarita Valley, Pomona Valley, Crescenta Valley and Antelope Valley; the county is divided west-to-east by the San Gabriel Mountains, which are part of the Transverse Ranges of southern California, are contained within the Angeles National Forest. Most of the county's highest peaks are in the San Gabriel Mountains, including Mount San Antonio 10,068 feet ) at the Los Angeles-San Bernardino county lines, Mount Baden-Powell 9,399 feet, Mount Burnham 8,997 feet and Mount Wilson 5,710 feet.
Several lower mountains are in the northern and southwestern parts of the county, including the San Emigdio Mountains, the southernmost part of Tehachapi Mountains and the Sierra Pelona Mountains. Los Angeles County includes San Clemente Island and Santa Catalina Island, which are part of the Channel Islands archipelago off the Pacific Coast. East: Eastside, San Gabriel Valley, portions of the Pomona Valley West: Westside, Beach Cities South: South Bay, South Los Angeles, Palos Verdes Peninsula, Gateway Cities, Los Angeles Harbor Region North: San Fernando Valley, Crescenta Valley, portions of the Conejo Valley, portions of the Antelope Valley and Santa Clarita Valley Central: Downtown Los Angeles, Mid-Wilshire, Northeast Los Angeles Angeles National Forest Los Padres National Forest Santa Monica Mountains National Recreation Area Los Angeles County had a population of 9,818,605 in the 2010 United States Census; the racial makeup of Los Angeles County was 4,936,599 White, 1,346,865 Asian, 856,874 African American, 72,828 Native A