Introducing a new way to navigate by topics. Access the latest news, data, publications and more around topics of interest.
Our population statistics cover age, sex, race, Hispanic origin, migration, ancestry, language use, veterans, as well as population estimates and projections.
This section provides information on a range of educational topics, from educational attainment and school enrollment to school districts, costs and financing.
We measure the state of the nations workforce, including employment and unemployment levels, weeks and hours worked, occupations, and commuting.
Our statistics highlight trends in household and family composition, describe characteristics of the residents of housing units, and show how they are related.
Health statistics on insurance coverage, disability, fertility and other health issues are increasingly important in measuring the nation's overall well-being.
We measure the housing and construction industry, track homeownership rates, and produce statistics on the physical and financial characteristics of our homes.
The U.S. Census Bureau is the official source for U.S. export and import statistics and regulations governing the reporting of exports from the U.S.
The U.S. Census Bureau provides data for the Federal, state and local governments as well as voting, redistricting, apportionment and congressional affairs.
Search an alphabetical index of keywords and phrases to access Census Bureau statistics, publications, products, services, data, and data tools.
Geography provides the framework for Census Bureau survey design, sample selection, data collection, tabulation, and dissemination.
Geography is central to the work of the Bureau, providing the framework for survey design, sample selection, data collection, tabulation, and dissemination.
Find resources on how to use geographic data and products with statistical data, educational blog postings, and presentations.
The Geographic Support System Initiative will integrate improved address coverage, spatial feature updates, and enhanced quality assessment and measurement.
Work with interactive mapping tools from across the Census Bureau.
Find geographic data and products such as Shapefiles, KMLs, TIGERweb, boundary files, geographic relationship files, and reference and thematic maps.
Metropolitan and micropolitan areas are geographic entities used by Federal statistical agencies in collecting, tabulating, and publishing Federal statistics.
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Definitions of geographic terms, why geographic areas are defined, and how the Census Bureau defines geographic areas.
We conduct research on geographic topics such as how to define geographic areas and how geography changes over time.
Visit our library of Census Bureau multimedia files. Collection formats include audio, video, mobile apps, images, and publications.
Collection of audio features and sound bites.
The Census Bureau packages data and information into easy-to-understand visuals.
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Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
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These external sites provide more data.
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Explore Census data with interactive visualizations covering a broad range of topics.
Learn how we serve the public as the most reliable source of data about the nation's people and economy.
How we provide the best mix of timeliness, relevancy, quality, and cost for the data we collect.
Our researchers explore innovative ways to conduct surveys, increase respondent participation, reduce costs, and improve accuracy.
Our surveys provide periodic and comprehensive statistics about the nation, critical for government programs, policies, and decisionmaking.
Learn about other opportunities to collaborate with us.
Explore the rich historical background of an organization with roots almost as old as the nation.
Explore prospective positions available at the Census Bureau.
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Discover the latest in Census Bureau data releases, reports, and events.
The Census Bureau's Director writes on how we measure America's people, places and economy.
Find interesting and quirky statistics regarding national celebrations and major events.
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Find media toolkits, advisories, and all the latest Census news.
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Purpose: The purpose of this standard is to ensure that statistically sound frames are designed and samples are selected to meet the objectives of the survey.
Scope: The Census Bureau's statistical quality standards apply to all information products released by the Census Bureau and the activities that generate those products, including products released to the public, sponsors, joint partners, or other customers. All Census Bureau employees and Special Sworn Status individuals must comply with these standards; this includes contractors and other individuals who receive Census Bureau funding to develop and release Census Bureau information products.
In particular, this standard applies to the design and selection of statistically sound samples used to produce estimates or make inferences. This standard covers:
In addition to the global exclusions listed in the Preface, this standard does not apply to:
Key Terms: Cluster, coverage, cut-off samples, estimate, estimation, frame, housing unit, peer review, precision, primary sampling unit (PSU), probability of selection, probability sampling, sample design, sample size, sampling frame, sampling weights, sequential sampling, strata, stratification, systematic sampling, target population, unduplication, variance, and weights.
Requirement A3-1: Throughout all processes associated with frame development and sample design, unauthorized release of protected information or administratively restricted information must be prevented by following federal laws (e.g., Title 13, Title 15, and Title 26), Census Bureau policies (e.g., Data Stewardship Policies), and additional provisions governing the use of the data (e.g., as may be specified in a memorandum of understanding or data-use agreement). (See Statistical Quality Standard S1, Protecting Confidentiality.)
Requirement A3–2: A plan must be developed that addresses:
Requirement A3-3: Sampling frames that meet the data collection objectives must be developed using statistically sound methods.
Examples of frame development activities include:
Requirement A3–4: The sample design must be developed to meet the objectives of the survey, using statistically sound methods. The size and design of the sample must reflect the level of detail needed in tabulations and other information products and the precision required of key estimates. Any use of nonprobability sampling methods (e.g., cut–off) must be justified statistically.
Examples of sample design activities include:
Requirement A3-5: Sampling frames must be implemented and samples selected to ensure high quality data.
Sub–Requirement A3–5.1: Specifications and procedures for creating frames and selecting samples, based on the statistical requirements, must be developed and implemented.
Examples of issues that specifications and procedures might address include:
Sub–Requirement A3–5.2: Systems and procedures must be verified and tested to ensure all components function as intended.
Examples of verification and testing activities include:
Sub–Requirement A3–5.3: Systems and procedures must be developed and implemented to monitor and evaluate the accuracy of the frame development and sample selection operations and to take corrective action if problems are identified.
Examples of activities to monitor and evaluate the accuracy include:
Requirement A3–6: Documentation needed to replicate and evaluate frame development and sample design operations must be produced. The documentation must be retained, consistent with applicable policies and data–use agreements, and must be made available to Census Bureau employees who need it to carry out their work.(See Statistical Quality Standard S2, Managing Data and Documents.)
Examples of documentation include: