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
Mignon is a census-designated place in Talladega County, United States. At the 2010 census the population was 1,284. Mignon became an incorporated town around 1915, but either disincorporated or lost its charter in the 1930s and did not show on the 1940 U. S. Census; because it still was a sizeable community of 3,000 residents, it was listed on the 1950 through 1970 census rolls as an unincorporated community. Beginning in 1980, it received the new status of census-designated place. Mignon is located at 33°10′59″N 86°15′52″W. According to the U. S. Census Bureau, the CDP has a total area of 2.6 square miles, of which 2.6 square miles is land and 0.04 square mile is water. As of the census of 2000, there were 1,348 people, 550 households, 365 families residing in the CDP; the population density was 480.4 people per square mile. There were 640 housing units at an average density of 228.1 per square mile. The racial makeup of the CDP was 76.19% White, 22.11% Black or African American, 0.52% Native American, 0.15% Asian, 1.04% from two or more races.
0.52% of the population were Hispanic or Latino of any race. There were 550 households out of which 28.7% had children under the age of 18 living with them, 44.5% were married couples living together, 16.5% had a female householder with no husband present, 33.5% were non-families. 30.2% of all households were made up of individuals and 14.5% had someone living alone, 65 years of age or older. The average household size was 2.45 and the average family size was 3.02. In the CDP, the population was spread out with 24.7% under the age of 18, 8.8% from 18 to 24, 28.6% from 25 to 44, 22.7% from 45 to 64, 15.3% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 94.2 males. For every 100 females age 18 and over, there were 88.7 males. The median income for a household in the CDP was $21,019, the median income for a family was $27,589. Males had a median income of $28,352 versus $19,375 for females; the per capita income for the CDP was $11,675. About 28.1% of families and 28.1% of the population were below the poverty line, including 48.1% of those under age 18 and 12.3% of those age 65 or over.
As of the census of 2010, there were 1,284 people, 507 households, 330 families residing in the CDP. The population density was 490 people per square mile. There were 628 housing units at an average density of 241.5 per square mile. The racial makeup of the CDP was 64.9% White, 27.1% Black or African American, 0.1% Native American, 0.5% Asian, 2.3% from two or more races. 6.9% of the population were Hispanic or Latino of any race. There were 507 households out of which 27.2% had children under the age of 18 living with them, 37.7% were married couples living together, 19.3% had a female householder with no husband present, 34.9% were non-families. 28.2% of all households were made up of individuals and 10.1% had someone living alone, 65 years of age or older. The average household size was 2.53 and the average family size was 3.05. In the CDP, the population was spread out with 23.3% under the age of 18, 11.1% from 18 to 24, 27.5% from 25 to 44, 27.3% from 45 to 64, 10.7% who were 65 years of age or older.
The median age was 37.7 years. For every 100 females, there were 95.1 males. For every 100 females age 18 and over, there were 105.6 males. The median income for a household in the CDP was $30,682, the median income for a family was $35,302. Males had a median income of $36,075 versus $13,750 for females; the per capita income for the CDP was $15,782. About 18.3% of families and 22.4% of the population were below the poverty line, including 25.8% of those under age 18 and 20.6% of those age 65 or over
United States Census Bureau
The United States Census Bureau is a principal agency of the U. S. Federal Statistical System, responsible for producing data about the American people and economy; the Census Bureau is part of the U. S. Department of Commerce and its director is appointed by the President of the United States; the Census Bureau's primary mission is conducting the U. S. Census every ten years, which allocates the seats of the U. S. House of Representatives to the states based on their population; the Bureau's various censuses and surveys help allocate over $400 billion in federal funds every year and it helps states, local communities, businesses make informed decisions. The information provided by the census informs decisions on where to build and maintain schools, transportation infrastructure, police and fire departments. In addition to the decennial census, the Census Bureau continually conducts dozens of other censuses and surveys, including the American Community Survey, the U. S. Economic Census, the Current Population Survey.
Furthermore and foreign trade indicators released by the federal government contain data produced by the Census Bureau. Article One of the United States Constitution directs the population be enumerated at least once every ten years and the resulting counts used to set the number of members from each state in the House of Representatives and, by extension, in the Electoral College; the Census Bureau now conducts a full population count every 10 years in years ending with a zero and uses the term "decennial" to describe the operation. Between censuses, the Census Bureau makes population projections. In addition, Census data directly affects how more than $400 billion per year in federal and state funding is allocated to communities for neighborhood improvements, public health, education and more; the Census Bureau is mandated with fulfilling these obligations: the collecting of statistics about the nation, its people, economy. The Census Bureau's legal authority is codified in Title 13 of the United States Code.
The Census Bureau conducts surveys on behalf of various federal government and local government agencies on topics such as employment, health, consumer expenditures, housing. Within the bureau, these are known as "demographic surveys" and are conducted perpetually between and during decennial population counts; the Census Bureau conducts economic surveys of manufacturing, retail and other establishments and of domestic governments. Between 1790 and 1840, the census was taken by marshals of the judicial districts; the Census Act of 1840 established a central office. Several acts followed that revised and authorized new censuses at the 10-year intervals. In 1902, the temporary Census Office was moved under the Department of Interior, in 1903 it was renamed the Census Bureau under the new Department of Commerce and Labor; the department was intended to consolidate overlapping statistical agencies, but Census Bureau officials were hindered by their subordinate role in the department. An act in 1920 changed the date and authorized manufacturing censuses every two years and agriculture censuses every 10 years.
In 1929, a bill was passed mandating the House of Representatives be reapportioned based on the results of the 1930 Census. In 1954, various acts were codified into Title 13 of the US Code. By law, the Census Bureau must count everyone and submit state population totals to the U. S. President by December 31 of any year ending in a zero. States within the Union receive the results in the spring of the following year; the United States Census Bureau defines four statistical regions, with nine divisions. The Census Bureau regions are "widely used...for data collection and analysis". The Census Bureau definition is pervasive. Regional divisions used by the United States Census Bureau: Region 1: Northeast Division 1: New England Division 2: Mid-Atlantic Region 2: Midwest Division 3: East North Central Division 4: West North Central Region 3: South Division 5: South Atlantic Division 6: East South Central Division 7: West South Central Region 4: West Division 8: Mountain Division 9: Pacific Many federal, state and tribal governments use census data to: Decide the location of new housing and public facilities, Examine the demographic characteristics of communities and the US, Plan transportation systems and roadways, Determine quotas and creation of police and fire precincts, Create localized areas for elections, utilities, etc.
Gathers population information every 10 years The United States Census Bureau is committed to confidentiality, guarantees non-disclosure of any addresses or personal information related to individuals or establishments. Title 13 of the U. S. Code establishes penalties for the disclosure of this information. All Census employees must sign an affidavit of non-disclosure prior to employment; the Bureau cannot share responses, addresses or personal information with anyone including United States or foreign government
1940 United States Census
The Sixteenth United States Census, conducted by the Census Bureau, determined the resident population of the United States to be 132,164,569, an increase of 7.3 percent over the 1930 population of 123,202,624 people. The census date of record was April 1, 1940. A number of new questions were asked including where people were 5 years before, highest educational grade achieved, information about wages; this census introduced sampling techniques. Other innovations included a field test of the census in 1939; this was the first census in which every state had a population greater than 100,000. The 1940 census collected the following information: In addition, a sample of individuals were asked additional questions covering age at first marriage and other topics. Full documentation on the 1940 census, including census forms and a procedural history, is available from the Integrated Public Use Microdata Series. Following completion of the census, the original enumeration sheets were microfilmed; as required by Title 13 of the U.
S. Code, access to identifiable information from census records was restricted for 72 years. Non-personally identifiable information Microdata from the 1940 census is available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. On April 2, 2012—72 years after the census was taken—microfilmed images of the 1940 census enumeration sheets were released to the public by the National Archives and Records Administration; the records are indexed only by enumeration district upon initial release. Official 1940 census website 1940 Census Records from the U. S. National Archives and Records Administration 1940 Federal Population Census Videos, training videos for enumerators at the U. S. National Archives Selected Historical Decennial Census Population and Housing Counts from the U. S. Census Bureau Snow, Michael S. "Why the huge interest in the 1940 Census?"
CNN. Monday April 9, 2012. 1941 U. S Census Report Contains 1940 Census results 1940 Census Questions Hosted at CensusFinder.com
Childersburg is a city in Talladega County in the U. S. state of Alabama. It was incorporated in 1889. At the 2010 census the population was 5,175, it claims a history dating back before 1540, when it was noted as a village of the Coosa Nation visited by the Spanish explorer Hernando de Soto. The Alabama Army Ammunition Plant, important during World War II, was located 4 miles north of Childersburg. Childersburg is located at 33°16′31″N 86°21′11″W. According to the U. S. Census Bureau, the city has a total area of 12.6 square miles, of which 12.4 square miles is land and 0.27 square miles, or 2.00%, is water. Successive indigenous peoples had lived in the area for thousands of years. In the 16th century, people identified as part of the Kymulga-phase culture lived at Talisi, the former site of Childersburg. In the fall of 1540, the Spanish Hernando de Soto expedition rested here for about one month during its exploration of the Southeast. Childersburg calls itself "The Oldest City in America"; the Abihka people dominated the area by the 18th century.
The Alabama Army Ammunition Plant, a munitions plant, was established in Childersburg in 1941 and operated throughout World War II until August 1945. Operated by DuPont, the plant produced explosives, such as nitrocellulose and dinitrotoluene; the plant secretly produced heavy water to support the Manhattan Project. In 1940 the town had about five hundred people. Over fourteen thousand workers came to build and operate the new facility; as of the census of 2000, there were 4,927 people residing in the city, an increase over the 1990 population of 4,600. In 2000, there were 1,419 families in the city; the population density was 637.2 people per square mile. There were 2,149 housing units at an average density of 277.9 per square mile. The racial makeup of the city was 68.87% White, 29.73% Black or African American, 0.32% Native American, 0.06% Asian, 0.02% Pacific Islander, 0.26% from other races, 0.73% from two or more races. 0.61 % of the population were Latino of any race. There were 1,999 households out of which 32.7% had children under the age of 18 living with them, 49.2% were married couples living together, 17.8% had a female householder with no husband present, 29.0% were non-families.
27.4% of all households were made up of individuals and 13.7% had someone living alone, 65 years of age or older. The average household size was 2.46 and the average family size was 2.98. In the city, the population was spread out with 27.0% under the age of 18, 9.3% from 18 to 24, 26.4% from 25 to 44, 22.1% from 45 to 64, 15.3% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 84.1 males. For every 100 females age 18 and over, there were 78.6 males. The median income for a household in the city was $23,932, the median income for a family was $30,524. Males had a median income of $31,892 versus $20,569 for females; the per capita income for the city was $15,412. About 20.7% of families and 23.8% of the population were below the poverty line, including 33.6% of those under age 18 and 19.9% of those age 65 or over. As of the census of 2010, there were 2,090 households and 1,422 families in the city; the population density was 417.3 people per square mile.
There were 2,356 housing units at an average density of 190 per square mile. The racial makeup of the city was 60.1% White, 36.9% Black or African American, 0.4% Native American, 0.5% Asian, 0.0% Pacific Islander, 0.3% from other races, 1.8% from two or more races. 1.3% of the population were Hispanic or Latino of any race. There were 2,090 households out of which 29.7% had children under the age of 18 living with them, 41.3% were married couples living together, 22.4% had a female householder with no husband present, 32.0% were non-families. 28.8% of all households were made up of individuals and 11.9% had someone living alone, 65 years of age or older. The average household size was 2.48 and the average family size was 3.04 In the city, the population was spread out with 26.4% under the age of 18, 9.6% from 18 to 24, 24.9% from 25 to 44, 24.0% from 45 to 64, 15.1% who were 65 years of age or older. The median age was 36.5 years. For every 100 females, there were 82.5 males. For every 100 females age 18 and over, there were 79.8 males.
The median income for a household in the city was $38,310, the median income for a family was $41,646. Males had a median income of $43,333 versus $25,450 for females; the per capita income for the city was $20,221. About 14.8% of families and 14.2% of the population were below the poverty line, including 18.4% of those under age 18 and 24.8% of those age 65 or over. There are ten golf courses in its immediate vicinity. Childersburg is home to the Childersburg Tigers. 1967, 1977, 2002, 2007 Alabama Baseball State Champions. Childersburg has won numerous youth baseball state championships including Cal Ripken, Babe Ruth and most American Legion. DeSoto Caverns is located in Childersburg. Walton Cruise, professional baseball player Joshua B. Lee, represented Oklahoma as a United States Representative from 1935 to 1937 and United States Senator from 1937 to 1943 Robert Lee Rowe, mayor of Melbourne, Florida from 1927 to 1932 Gerald Wallace, professional basketball player Zelous Wheeler, professional baseball player Intercity bus service is provided by Greyhound Lines.
Official website Childersburg Chamber of Commerce DeSoto Caverns Park
In law, an unincorporated area is a region of land, not governed by a local municipal corporation. Municipalities dissolve or disincorporate, which may happen if they become fiscally insolvent, services become the responsibility of a higher administration. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. In most other countries of the world, there are either no unincorporated areas at all, or these are rare. Unlike many other countries, Australia has only one level of local government beneath state and territorial governments. A local government area contains several towns and entire cities. Thus, aside from sparsely populated areas and a few other special cases all of Australia is part of an LGA. Unincorporated areas are in remote locations, cover vast areas or have small populations. Postal addresses in unincorporated areas, as in other parts of Australia use the suburb or locality names gazetted by the relevant state or territorial government.
Thus, there is any ambiguity regarding addresses in unincorporated areas. The Australian Capital Territory is in some sense an unincorporated area; the territorial government is directly responsible for matters carried out by local government. The far west and north of New South Wales constitutes the Unincorporated Far West Region, sparsely populated and warrants an elected council. A civil servant in the state capital manages such matters; the second unincorporated area of this state is Lord Howe Island. In the Northern Territory, 1.45% of the total area and 4.0% of the population are in unincorporated areas, including Unincorporated Top End Region, areas covered by the Darwin Rates Act—Nhulunbuy, Alyangula on Groote Eylandt in the northern region, Yulara in the southern region. In South Australia, 60% of the area is unincorporated and communities located within can receive municipal services provided by a state agency, the Outback Communities Authority. Victoria has 10 small unincorporated areas, which are either small islands directly administered by the state or ski resorts administered by state-appointed management boards.
Western Australia is exceptional in two respects. Firstly, the only remote area, unincorporated is the Abrolhos Islands, uninhabited and controlled by the WA Department of Fisheries. Secondly, the other unincorporated areas are A-class reserves either in, or close to, the Perth metropolitan area, namely Rottnest Island and Kings Park. In Canada, depending on the province, an unincorporated settlement is one that does not have a municipal council that governs over the settlement, it is but not always, part of a larger municipal government. This can range from small hamlets to large urbanized areas that are similar in size to towns and cities. For example, the urban service areas of Fort McMurray and Sherwood Park, of the Regional Municipality of Wood Buffalo and Strathcona County would be the fifth and sixth largest cities in Alberta if they were incorporated. In British Columbia, unincorporated settlements lie outside municipal boundaries and are administered directly by regional/county-level governments similar to the American system.
Unincorporated settlements with a population of between 100 and 1,000 residents may have the status of designated place in Canadian census data. In some provinces, large tracts of undeveloped wilderness or rural country are unorganized areas that fall directly under the provincial jurisdiction; some unincorporated settlements in such unorganized areas may have some types of municipal services provided to them by a quasi-governmental agency such as a local services board in Ontario. In New Brunswick where a significant population live in a Local Service District and services may come directly from the province; the entire area of the Czech Republic is divided into municipalities, with the only exception being 4 military areas. These are parts of the regions and do not form self-governing municipalities, but are rather governed by military offices, which are subordinate to the Ministry of Defense. † Brdy Military Area was abandoned by the Army in 2015 and converted into Landscape park, with its area being incorporated either into existing municipalities or municipalities newly established from the existing settlements.
The other four Military Areas were reduced in size in 2015 too. The decisions on whether the settlements join existing municipalities or form new ones are decided in plebiscites. Since Germany has no administrative level comparable to the townships of other countries, the vast majority of the country, close to 99%, is organized in municipalities consisting of multiple settlements which are not considered to be unincorporated; because these settlements lack a council of their own, there is an Ortsvorsteher / Ortsvorsteherin appointed by the municipal council, except in the smallest villages. In 2000, the number of unincorporated areas in Germany, called gemeindefreie Gebiete or singular gemeindefreies Gebiet, was 295 with a total area of 4,890.33 km² and around 1.4% of its territory. However
A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is used in Canada, Romania and the United States. County towns have a similar function in the United Kingdom and Republic of Ireland, in Jamaica. In most of the United States, counties are the political subdivisions of a state; the city, town, or populated place that houses county government is known as the seat of its respective county. The county legislature, county courthouse, sheriff's department headquarters, hall of records and correctional facility are located in the county seat though some functions may be located or conducted in other parts of the county if it is geographically large. A county seat is but not always, an incorporated municipality; the exceptions include the county seats of counties that have no incorporated municipalities within their borders, such as Arlington County, Virginia. Ellicott City, the county seat of Howard County, is the largest unincorporated county seat in the United States, followed by Towson, the county seat of Baltimore County, Maryland.
Some county seats may not be incorporated in their own right, but are located within incorporated municipalities. For example, Cape May Court House, New Jersey, though unincorporated, is a section of Middle Township, an incorporated municipality. In some of the colonial states, county seats include or included "Court House" as part of their name. In the Canadian provinces of Prince Edward Island, New Brunswick, Nova Scotia, the term "shire town" is used in place of county seat. County seats in Taiwan are the administrative centers of the counties. There are 13 county seats in Taiwan, which are in the forms of county-administered city, urban township or rural township. Most counties have only one county seat. However, some counties in Alabama, Georgia, Kentucky, Mississippi, New Hampshire, New York, Vermont have two or more county seats located on opposite sides of the county. An example is Harrison County, which lists both Biloxi and Gulfport as county seats; the practice of multiple county seat towns dates from the days.
There have been few efforts to eliminate the two-seat arrangement, since a county seat is a source of pride for the towns involved. There are 36 counties with multiple county seats in 11 states: Coffee County, Alabama St. Clair County, Alabama Arkansas County, Arkansas Carroll County, Arkansas Clay County, Arkansas Craighead County, Arkansas Franklin County, Arkansas Logan County, Arkansas Mississippi County, Arkansas Prairie County, Arkansas Sebastian County, Arkansas Yell County, Arkansas Columbia County, Georgia Lee County, Iowa Campbell County, Kentucky Kenton County, Kentucky Essex County, Massachusetts Middlesex County, Massachusetts Plymouth County, Massachusetts Bolivar County, Mississippi Carroll County, Mississippi Chickasaw County, Mississippi Harrison County, Mississippi Hinds County, Mississippi Jasper County, Mississippi Jones County, Mississippi Panola County, Mississippi Tallahatchie County, Mississippi Yalobusha County, Mississippi Jackson County, Missouri Hillsborough County, New Hampshire Seneca County, New York Bennington County, Vermont In New England, the town, not the county, is the primary division of local government.
Counties in this region have served as dividing lines for the states' judicial systems. Connecticut and Rhode Island have no county level of thus no county seats. In Vermont and Maine the county seats are designated shire towns. County government consists only of a Superior Court and Sheriff, both located in the respective shire town. Bennington County has two shire towns. In Massachusetts, most government functions which would otherwise be performed by county governments in other states are performed by town or city governments; as such, Massachusetts has dissolved many of its county governments, the state government now operates the registries of deeds and sheriff's offices in those counties. In Virginia, a county seat may be an independent city surrounded by, but not part of, the county of which it is the administrative center. Two counties in South Dakota have their county seat and government services centered in a neighboring county, their county-level services are provided by Fall River Tripp County, respectively.
In Louisiana, divided into parishes rather than counties, county seats are referred to as parish seats. Alaska is divided into boroughs rather than counties; the Unorganized Borough, which covers 49 % of Alaska's area, has equivalent. The state with the most counties is Texas, with 254, the state with the fewest counties is Delaware, with 3. County seat war Administrative center County town, administrative centres in Ireland and the UK Chef-lieu, administrative centres in Algeria, Luxembourg, France and Tunisia Municipality, equivalent to county in many c