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.
Find information about specific partnership programs and learn more about our partnerships with other organizations.
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.
Official audio files from the Census Bureau, including "Profile America," a daily series of bite-sized statistics, placing current data in a historical context.
Infographics include information on the Census Bureau's history of data collection, our nation's veterans and the American Community Survey.
Read briefs and reports from Census Bureau experts.
Watch Census Bureau vignettes, testimonials, and video files.
Read research analyses from Census Bureau experts.
Access data through products and tools including data visualizations, mobile apps, interactive web apps and other software.
Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
Find a multitude of DVDs, CDs and publications in print by topic.
These external sites provide more data.
Download extraction tools to help you get the in-depth data you need.
Learn more about our data from this collection of e-tutorials, presentations, webinars and other training materials. Sign up for training sessions.
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.
Information about the U.S. Census Bureau.
Information about what we do at the U.S. Census Bureau.
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 U.S. Census Bureau.
Information about the current field vacancies available at the U.S. Census Bureau Regional Offices.
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.
Profile America is a daily, 60-second feature that uses interesting vignettes for that day to highlight information collected by the Census Bureau.
Find media toolkits, advisories, and all the latest Census news.
See what's coming up in releases and reports.
Purpose: The purpose of this standard is to ensure that measures and indicators of nonsampling error are computed and documented to allow users to interpret the results in information products, to provide transparency regarding the quality of the data, and to guide improvements to the program.
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 activities associated with producing measures or indicators of nonsampling error associated with estimates for Census Bureau information products. Examples of nonsampling error sources include:
In addition to the global exclusions listed in the Preface, this standard does not apply to:
Key Terms: Convenience sample, coverage, coverage error, coverage ratio, equivalent quality data, item allocation rate, item nonresponse, key variables, latent class analysis, longitudinal survey, measurement error, nonresponse bias, nonresponse error, nonsampling error, probability of selection, quantity response rate, reinterview, release phase, respondent debriefing, response analysis survey, total quantity response rate, and unit nonresponse.
Requirement D3-1: Throughout all processes associated with producing measures and indicators of nonsampling error, 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 D3-2: A plan must be developed that addresses:
Note: Statistical Quality Standard A1, Planning a Data Program, addresses overall planning requirements, including estimates of schedule and costs.
Requirement D3-3: Except in the situations noted below, weighted response rates must be computed to measure unit and item nonresponse. The weights must account for selection probabilities, including probabilities associated with subsampling for nonresponse follow-up.
Response rates may be computed using unweighted data when:
Note: In general, computing response rates is not appropriate for samples that are not randomly selected (e.g., convenience samples or samples with self-selected respondents).
Sub-Requirement D3-3.1: For demographic surveys and decennial censuses, when computing unit response rates, item response rates or item allocation/imputation rates (for key variables), and total item response rates:
Sub-Requirement D3-3.2:For economic surveys and censuses, when computing unit response rates, quantity response rates (for key variables), and total quantity response rates:
Sub-Requirement D3-3.3: Rates for the types of nonresponse (e.g., refusal, unable to locate, no one home, temporarily absent, language problem, insufficient data, or undeliverable as addressed) must be computed to facilitate the interpretation of the unit response rate and to better manage resources.
Sub-Requirement D3-3.4: For panel or longitudinal surveys, cumulative response rates must be computed using weighted data or cumulative total quantity response rates must be computed to reflect the total attrition of eligible units over repeated waves of data collection. If a survey uses respondents from another survey or census as its sampling frame, then the response rate of the survey (or census) serving as the frame must be included in the computation of the cumulative response rate.
Sub-Requirement D3-3.5: Cumulative response rates must be computed using weighted data over successive stages of multistage data collections (e.g., a screening interview followed by a detailed interview). If estimated probabilities of selection must be used and the accuracy of the response rate might be affected, then a description of the issues affecting the response rate must also be provided.
Note: In most situations, a simple multiplication of response rates for each stage is appropriate. In other situations, a more complex computation may be required.
Sub-Requirement D3-3.6: Nonresponse bias analyses must be conducted when unit, item, or total quantity response rates for the total sample or important subpopulations fall below the following thresholds.
Note: If response rates fall below these thresholds in a reimbursable data collection, the sponsor is responsible for conducting the nonresponse bias analysis.
Requirement D3-4: Coverage ratios must be computed to measure coverage error, as an indicator of potential bias, using statistically sound methods (e.g., computing coverage ratios as the uncontrolled estimate of population for a demographic-by-geographic group divided by the population control total for the demographic-by-geographic cell used in post-stratification adjustments or using capture-recapture methods).
Note: If computing coverage ratios is not appropriate, a description of the efforts undertaken to ensure high coverage must be made available.
Requirement D3-5: Measures or indicators of nonsampling error associated with data from administrative records must be computed to inform users of the quality of the data.
Examples of measures and indicators include:
Requirement D3-6: Measures or indicators of nonsampling error associated with data collection and processing activities must be computed to inform users of the quality of the data.
Examples of indicators of nonsampling error include:
Examples of analyses or studies that generate measures or indicators of nonsampling error include:
Requirement D3-7: Methods and systems for calculating measures and indicators of nonsampling error must be verified and tested to ensure all components function as intended.
Examples of verification and testing activities include:
Requirement D3-8: Measures and indicators of nonsampling error must be evaluated to guide improvements to the program.
Examples of evaluation activities include:
Requirement D3-9: Documentation needed to replicate and evaluate the activities associated with producing measures and indicators of nonsampling error 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: