A census is the process of obtaining information about every member of a population (not necessarily a human population). It can be contrasted with sampling in which information is only obtained from a subset of a population. As such it is a method used for accumulating statistical data, and it is also vital to democracy (voting). Census data is also commonly used for research, business marketing, and planning purposes.
It is not unusual for census data to be processed in some way so as to obscure individual information. Some censuses do this by intentionally introducing small statistical errors to prevent the identification of individuals in marginal populations; others swap variables for similar respondents.
More on [ Census ]

ACA's Position on the Census Issue - Asserts that excluding private US citizens residing abroad results in a distortion of the congressional apportionment process.
Census 2000 a Tool of Socialist State Building - Editorial comment on the premise that the US census is unconstitutional and designed to assist in expanding a socialist state.
Meta Description: [ All questions but one are unconstitutional and designed to assist bureaucrats in expanding the scope of Big Brother. Supplemental materials and related sites listed ]
Census 2000 and Racial Information: Reverse Discrimination? - Argues that census race data is used to allocate tax dollars for racial quota programs, which discriminates unfairly against anyone not in a politically correct group.
Meta Description: [ Census 2000 Racial Data Is Used for Reverse Discrimination. ]
Census 2000 Protest - Argues that the US census focuses too much attention on race, essentially pitting each race against another for special government favors.
Meta Description: [ bimonthy contemporary advocacy of a mixed-race identifier ]
How Stuff Works: U.S. Census - Defends the census, explaining some of how it works from a Census office kind of perspective.
Meta Description: [ The U.S. census is a huge, $6.5 billion project bent on counting every U.S. resident! This new article discusses the census forms, how to complete them, and where to go with questions! ]
Prisoners of the Census - Criticizes how the U.S. census counts prisoners and includes factsheets, testimony, and research on how economic and political resources are allocated based on population.
Meta Description: [ research and advocacy on incarceration policy ]
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Rebuke Census Racism - States that diversity (continental origin, national origins, and ethnicities) is literally smothered by insensitive bureaucrats who developed the labels that are used in the USA 2000 Census forms.
The 'race' question on the U.S. census is racist. - Editorial arguing that the question of race on the U.S. Census is racist.
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