Census in the context of Applied statistics

Demography (from Ancient Greek δῆμος (dêmos) 'people, society' and -γραφία (-graphía) 'writing, drawing, description') is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the interplay of fertility (births), mortality (deaths), and migration.

Demographic analysis examines and measures the dimensions and dynamics of populations; it can cover whole societies or groups defined by criteria such as education, nationality, religion, and ethnicity. Educational institutions usually treat demography as a field of sociology, though there are a number of independent demography departments. These methods have primarily been developed to study human populations, but are extended to a variety of areas where researchers want to know how populations of social actors can change across time through processes of birth, death, and migration. In the context of human biological populations, demographic analysis uses administrative records to develop an independent estimate of the population. Demographic analysis estimates are often considered a reliable standard for judging the accuracy of the census information gathered at any time. In the labor force, demographic analysis is used to estimate sizes and flows of populations of workers; in population ecology the focus is on the birth, death, migration and immigration of individuals in a population of living organisms, alternatively, in social human sciences could involve movement of firms and institutional forms. Demographic analysis is used in a wide variety of contexts. For example, it is often used in business plans, to describe the population connected to the geographic location of the business. Demographic analysis is usually abbreviated as DA. For the 2010 U.S. Census, The U.S. Census Bureau has expanded its DA categories. Also as part of the 2010 U.S. Census, DA now also includes comparative analysis between independent housing estimates, and census address lists at different key time points.

The following is a list of Italian municipalities (comuni) with a population over 50,000. The table below contains the cities populations as of 1 January 2025, as estimated by the Italian National Institute of Statistics, and the cities census population from the 2021 Italian Census.Cities in bold are regional capitals.

This is a list of the current 54 African countries sorted by population, also sorted by normalized demographic projections from the most recently available census or demographic data. Africa is the fastest growing continent in the world, currently increasing by 2.35% per year as of 2021. Africa is also the continent with the youngest population, as 60% of Africans are 24 years of age or younger. This list also includes the French department Réunion, and the partially recognized country Sahrawi Arab Democratic Republic, commonly known as Western Sahara, which is a member of the African Union.

The Statistics Bureau of Japan or SB/SBJ (統計局, Tōkeikyoku) is the statistical agency of Japan, subordinate to the Ministry of Internal Affairs and Communications (MIC). The SBJ have conducted the Population Census and large-scale surveys to establish key official statistics of Japan. It is also in charge of the management of the public online system of official statistics, international cooperation with other countries' statistics offices, and research and publication regarding statistics.Its headquarters is in the ministry's Second Government Office (第2庁舎), in Wakamatsu-cho [ja], Shinjuku, Tokyo, near Wakamatsu-kawada Station of the subway Toei Ōedo Line.The National Statistics Center [ja] (NSTAC) and the MIC Director-General for Policy Planning  [ja] are in the same building.

Japan's official statistics system is so "decentralized"that various ministries and agencies have their own statistical departments. The SBJ is the oldest among them. The SBJ's chronological table starts from 1871, when the pre-constitutional Meiji government founded the Statistics Division (政表課, Seihyōka) under the Dajōkan system, appointing Sugi Kōji [ja] to its director. After frequent changes in the government organization, the Cabinet Statistics Bureau (内閣統計局, Naikaku Tōkeikyoku) was established in 1885 with the Cabinet system starting. In 1920 it was reorganized as Census Office (国勢院, Kokuseiin) to conduct the first Population Census (国勢調査, Kokusei Chōsa), but in 1922 it was re-reorganized to the Statistics Bureau as an agency of the Cabinet. Since then, it has used the name of Statistics Bureau (Tōkeikyoku). Despite some changes in its affiliation, it has kept the identity at least since the 1880s.

Statistics (from German: Statistik, orig. "description of a state, a country") is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. In applying statistics to a scientific, industrial, or social problem, it is conventional to begin with a statistical population or a statistical model to be studied. Populations can be diverse groups of people or objects such as "all people living in a country" or "every atom composing a crystal". Statistics deals with every aspect of data, including the planning of data collection in terms of the design of surveys and experiments.

When census data (comprising every member of the target population) cannot be collected, statisticians collect data by developing specific experiment designs and survey samples. Representative sampling assures that inferences and conclusions can reasonably extend from the sample to the population as a whole. An experimental study involves taking measurements of the system under study, manipulating the system, and then taking additional measurements using the same procedure to determine if the manipulation has modified the values of the measurements. In contrast, an observational study does not involve experimental manipulation.

The 2021 Population and Housing Census (Greek: Απογραφή Πληθυσμού–Kατοικιών 2021) is a census in Greece that was conducted by the Hellenic Statistical Authority as part of the wider 2021 European Union census. As with the 2011 census, it enumerates the number of people in the country and surveys the demographic, economic, and social characteristics of the population, as well as the types of building stock available in the country. The census complies with both European Union and United Nations census guidelines. The full set of results will be available by 31 March 2024.

Smartphone and geolocation technologies were utilized in order to carry out the census. A design competition was launched in September 2018, asking university students to design the census logo, and the winner was announced in 2019.

The censor was a magistrate in ancient Rome who was responsible for maintaining the census, supervising public morality, and overseeing certain aspects of the government's finances.

Established under the Roman Republic, power of the censor was limited in subject matter but absolute within his sphere: in matters reserved for the censors, no magistrate could oppose his decisions, and only another censor who succeeded him could cancel those decisions. Censors were also given unusually long terms of office; unlike other elected offices of the Republic, which (excluding certain priests elected for life) had terms of 12 months or less, censors' terms were generally 18 months to 5 years (depending on the era). The censorate was thus highly prestigious, preceding all other regular magistracies in dignity if not in power and reserved with rare exceptions for former consuls. Attaining the censorship would thus be considered the crowning achievement of a Roman politician on the cursus honorum. However, the magistracy as a regular office did not survive the transition from the Republic to the Empire.

The 2021 Romanian census (Romanian: Recesământul Populației și Locuințelor 2021 (RPL2021)) was a census held in Romania between 1 February and 31 July 2022, with the reference day for the census data set at 1 December 2021. The census was supposed to be done in 2021, but it was postponed due to the COVID-19 pandemic in Romania in order to avoid census takers from getting infected when coming into contact with ill or quarantined people. It was the first census held in Romania in which data was collected online, something that had support among Romanian youth.

The census was divided into three phases: one in which personal data of the Romanian population was collected from various sites; another in which the population was to complete more precise data such as religion, in which town halls would help the natives of rural areas to answer the census; and a third one in which census takers would go to the homes and households of those who did not register their data online.

The 2021 Russian census (Russian: Всероссийская перепись населения 2021 года, romanized: Vserossiyskaya perepis naseleniya 2021 goda, lit. '2021 All-Russian population census') was the first census of the Russian Federation population since 2010 and the third after the dissolution of the Soviet Union. It took place between October 15 and November 14. However, for the remote and inaccessible areas of Russia, the census took place between April 1 and December 20.

The preparations for the census started in 2017 with the adoption of the government decree "On the conduct of the Russian Population Census 2020". According to Pavel Malkov, head of Rosstat, the budget allocated for the 2020 census was 33 billion rubles. The motto of the census was "Create the future!".

The 2010 Russian census (Russian: Всеросси́йская пе́репись населе́ния 2010 го́да) was the second census of the Russian Federation population after the dissolution of the Soviet Union. Preparations for the census began in 2007 and it took place between October 14 and October 25.

The 2002 Russian census (Russian: Всеросси́йская пе́репись населе́ния 2002 го́да) was the first census of the Russian Federation since the dissolution of the Soviet Union, carried out on October 9 through October 16, 2002. It was carried out by the Russian Federal Service of State Statistics (Rosstat).

Birth rate, also known as natality and the crude birth rate, is the total number of live human births per 1,000 population for a given period divided by the length of the period in years. The number of live births is normally taken from a universal registration system for births; population counts from a census. The birth rate (along with mortality and migration rates) is used to calculate population growth. The estimated average population may be taken as the mid-year population.

When the crude death rate is subtracted from the crude birth rate (CBR), the result is the rate of natural increase (RNI). This is equal to the rate of population change (excluding migration).

Native Americans (also called American Indians, First Americans, or Indigenous Americans) are the Indigenous peoples of the United States, particularly of the lower 48 states and Alaska. They may also include any Americans whose origins lie in any of the indigenous peoples of North or South America. The United States Census Bureau publishes data about "American Indians and Alaska Natives", whom it defines as anyone "having origins in any of the original peoples of North and South America ... and who maintains tribal affiliation or community attachment". The census does not, however, enumerate "Native Americans" as such, noting that the latter term can encompass a broader set of groups, e.g. Native Hawaiians, which it tabulates separately.

The European colonization of the Americas from 1492 resulted in a precipitous decline in the size of the Native American population because of newly introduced diseases, including weaponized diseases and biological warfare by colonizers, wars, ethnic cleansing, and enslavement. Numerous scholars have classified elements of the colonization process as comprising genocide against Native Americans. As part of a policy of settler colonialism, European settlers continued to wage war and perpetrated massacres against Native American peoples, removed them from their ancestral lands, and subjected them to one-sided government treaties and discriminatory government policies. Into the 20th century, these policies focused on forced assimilation.

Kidderminster is a market town and civil parish in Worcestershire, England, 18 miles (29 km) south-west of Birmingham and 15 miles (24 km) north of Worcester. Located north of the River Stour and east of the River Severn, in the 2021 census, it had a population of 57,400. The town is twinned with Husum, Germany.

Situated in the far north of Worcestershire (and with its northern suburbs only 3 and 4 miles from the Staffordshire and Shropshire borders respectively), the town is the main administration centre for the wider Wyre Forest District, which includes the towns of Stourport-on-Severn and Bewdley, along with other outlying settlements.

The 2020 United States census was the 24th decennial United States census. Census Day, the reference day used for the census, was April 1, 2020. Other than a pilot study during the 2000 census, this was the first U.S. census to offer options to respond online or by phone, in addition to the paper response form used for previous censuses.

The census was taken during the COVID-19 pandemic, which affected its administration. The census recorded a resident population of 331,449,281 in the 50 states and the national capital of Washington, D.C., reflecting an increase of 7.4%, or 22,703,743, over 2010. The growth rate was the second-lowest ever recorded, and the net increase was the sixth-highest in history. This was the first census where the ten most-populous states each surpassed ten million residents, and the first census where the ten most-populous cities each surpassed one million residents.

The 2010 United States census was the 23rd United States census. National Census Day, the reference day used for the census, was April 1, 2010. The census was taken via mail-in citizen self-reporting, with enumerators serving to spot-check randomly selected neighborhoods and communities. As part of a drive to increase the count's accuracy, 635,000 temporary enumerators were hired. The population of the United States was counted as 308,745,538, a 9.7% increase from the 2000 United States census. This was the first census in which all states recorded a population of over 500,000 people as well as the first in which all 100 largest cities recorded populations of over 200,000.

It was the first census since 1930 that California did not record the largest population growth in absolute number. Texas surpassed California's growth by 4.3 million to 3.4 million.

This is a demography of Argentina including population density, ethnicity, economic status, age and other aspects of the population.

As of the 2022 census [INDEC], Argentina had a population of 46,044,703 - a 15.3% increase from the 40,117,096 counted in the 2010 census [INDEC].