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Population statistics is the use of statistics to analyze characteristics or changes to a population. It is related to social demography and demography.

Population statistics can analyze anything from global demographic changes to local small scale changes. For example, an analysis of global change shows that population growth has slowed, infant mortality rates have declined and there have been small increases in the aged.


National population statistics are usually collected by conducting a census. However, because these are usually huge logistical exercises, countries normally conduct censuses only once every five to 10 years. Even when a census is conducted it may miss counting everyone (known as undercount). Also, some people counted in the census may be recorded in a different place than where they usually live, because they are travelling, for example (this may result in overcounting). Consequently, raw census numbers are often adjusted to produce census estimates that identify such statistics as resident population, residents, tourists and other visitors, nationals and aliens(non-nationals). For privacy reasons, particularly when there are small counts, some census results may be rounded, often to the nearest ten, hundred, thousand and sometimes randomly up, down or to another small number such as within 3 of the actual count.

Between censuses, administrative data collected by various agencies about population events such as births, deaths, and cross-border migration may be used to produce intercensal estimates.

Population estimates and projections[edit]

Population estimates are usually derived from census and other administrative data. Population estimates are normally produced after the date the estimate is for.

Some estimates, such as the Usually resident population estimate who usually lives in a locality as at the census date, even though the census did not count them within that locality. Census questions usually include a questions about where a person usually lives, whether they are a resident or visitor, or also live somewhere else, to allow these estimates to be made.

Other estimates are concerned with estimating population on a particular date that is different from the census date, for example the middle or end of a calendar or financial year. These estimates often use birth and death records and migration data to adjust census counts for the changes that have happened since the census.

Population projections are produced in advance of the date they are for. They use time series analysis of existing census data and other sources of population information to forecast the size of future populations. Because there are unknown factors that may affect future population changes, population projections often incorporate high and low as well as expected values for future populations. Population projections are often recomputed after a census has been conducted. It depends on how conjusted the area is in the particular demarcation.


While many censuses were conducted in antiquity, there are few population statistics that survive. One example though can be found in the Bible, in chapter 1 of the Book of Numbers. Not only are the statistics given, but the method used to compile those statistics is also described. In modern day terms, this metadata about the census is probably of as much value as the statistics themselves as it allows researchers to determine not only what was being counted but how and why it was done.


Modern population statistics are normally accompanied by metadata that explains how the statistics have been compiled and adjusted to compensate for any collection issues.

Statistical sources[edit]

Most countries have a census bureau or government agency responsible for conducting censuses. Many of these agencies publish their country's census results and other population statistics on their agency's website.

See also[edit]


External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Population_statistics — Please support Wikipedia.
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140 news items


New Zealand Herald
Thu, 14 Aug 2014 00:40:38 -0700

The estimates were the best available indication of how many people live in New Zealand, because they included people missed by the census, including those who were temporarily overseas on census night, population statistics manager Vina Cullum said.
Thu, 28 Aug 2014 13:56:51 -0700

The Office of Employment and Population Statistics within the Arizona Department of Administration researches a variety of labor market and demographic information for the state. Officials are predicting gradual gains in non-farm employment, with an ...
National Review Online
Wed, 27 Aug 2014 14:00:00 -0700

According to 2010 population statistics, blacks make up 12.6% of the U.S. population. The Congressional Black Caucus's numbers show that blacks hold 12.1% of federal judgeships. That would suggest a trivial disparity (again, even using a very favorable ...
The State
Fri, 22 Aug 2014 19:52:40 -0700

The county contracted with the Carolina Population Center at UNC to work up some population statistics this summer, and the million-mark estimation was part of the package. To estimate the date, demographer Becky Tippett compared the 2010 census ...

Irish Independent

Irish Independent
Wed, 27 Aug 2014 18:30:00 -0700

He added that the latest house price data tied in with population statistics released this week which showed that emigration is falling and the population is growing. "If we look to cities across the developed world where populations are increasing and ...

The New Republic

The New Republic
Wed, 13 Aug 2014 17:12:54 -0700

Michael Brown's Death Was Shocking. So Are the Racial Profiling Stats We've Been Ignoring. 93% of drivers arrested in Ferguson are black, but blacks make up 67% of the population. By Jason Zengerle @zengerle Photo: Scott Olson/Getty Images. For the ...


Mon, 25 Aug 2014 17:33:45 -0700

Depopulation continues to be a dire problem facing Japan. In an effort to address the issue, the government in June announced the goal of maintaining the population at 100 million over the next 50 years, as part of broader economic policies. The plan ...
Sun, 03 Aug 2014 20:56:15 -0700

The data center, Pennsylvania's liaison to the U.S. Census Bureau and the state's official source of population statistics, developed long-range population forecasts for each of Pennsylvania's 67 counties. Crawford and Warren counties are projected to ...

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