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Island Areas Censuses Technical Documentation

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Island Areas Censuses Technical Documentation

Go to Decennial Censuses Documentation

Technical documents are designed to help people use published statistics. The resources available for download may vary by census year and can include the following.

Codebooks - Information about the files, including descriptive information on all of the variables.

Data Dictionary - A repository of information describing database attributes including identification of record codes and area characteristics, endnotes, and table section.

Historical Changes - Information for the current census year and prior census years.

Methodology - The methods we use to collect census data and produce the census results, including sampling, questions, collection, review, quality, weighting, etc.

Questionnaires - Find the most recent questionnaire and whether an archive of past questionnaires is available online.

Subject Definitions - Definitions of population, housing and other variables to help you understand the results of a census.

User Notes - Issues affecting the census, including design, collection, processing, tabulation, and release, to be better informed when analyzing stats.

2020
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2020

Complete technical documentation for 2020 Island Areas Censuses data products will be published here once the corresponding data product is available. Planned release dates are listed below.

User note: Once available, each technical document will include documentation for all of the Island Areas. This is a change from past censuses where American Samoa, Guam, Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands each had its own separate technical documentation.

Download Technical Documentation

Click the product name below to access technical documentation, resources related to geographic concepts, as well as other resources.

pdf Technical Documentation: Demographic Profile Summary File
Complete technical documentation, including access to the table and geographic information listed on this webpage.
pdf Additional Guidance: 2020 Island Areas Censuses Demographic Profile Data
Information about differences between table universes and the availability of specific geographies in the Demographic Profile.
xls List of Tables (Matrices)
Information about the table titles and table universes for all four Island Areas.
xls Subject Locator
Locate the Table ID(s) for a subject of interest. The file contains Table IDs for all four Island Areas.
xls Table Matrix and Segments: American Samoa
Information about tables for American Samoa and how they are arranged in the data files.
xls Table Matrix and Segments: Commonwealth of the Northern Mariana Islands (CNMI)
Information about tables for the CNMI and how they are arranged in the data files.
xls Table Matrix and Segments: Guam
Information about tables for Guam and how they are arranged in the data files.
xls Table Matrix and Segments: U.S. Virgin Islands
Information about tables for the U.S. Virgin Islands and how they are arranged in the data files.

Resources Related to Geographic Concepts

xls Geographic Header Record: American Samoa, Commonwealth of the Northern Mariana Islands, Guam
Lists each field and provides its data dictionary reference name, maximum field size, and data type.
xls Geographic Header Record: U.S. Virgin Islands
Lists each field and provides its data dictionary reference name, maximum field size, and data type.
pdf Data Dictionary for Geographic Header
Information about interpreting the records and geographic codes within the data.
xls Summary Level Hierarchy Chart
Displays the hierarchical relationships among the summary levels in the summary file.
xls Summary Level Sequence List
Information about the summary levels in the summary file and the geographic components associated with each summary level.

Additional Resources

pdf Accuracy and Confidentiality of the Data
A high-level overview of data collection methodology, confidentiality protections, and accuracy of the data.
pdf Residence Criteria and Resident Situations
Criteria that are used to determine where people are counted during the census.
pdf Questionnaire
Informational questionnaires used during the 2020 Island Areas Censuses.
pdf User Notes and Errata
Issues affecting the 2020 Island Areas Censuses, including design, collection, production, and release, to be better informed when analyzing statistics.
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pdf Technical Documentation: DHC
Complete technical documentation, including access to the table and geographic information listed on this webpage.
pdf Additional Guidance on Using the Island Areas Censuses DHC
Information about differences between table universes and the availability of specific geographies in the DHC.
xls List of Tables (Matrices)
Information about the table titles and table universes for all four Island Areas.
xls Subject Locator
Locate the Table ID(s) for a subject of interest. The file contains Table IDs for all four Island Areas.
xls Table Matrix and Segments: American Samoa
Information about tables for American Samoa and how they are arranged in the data files.
xls Table Matrix and Segments: Commonwealth of the Northern Mariana Islands (CNMI)
Information about tables for the CNMI and how they are arranged in the data files.
xls Table Matrix and Segments: Guam
Information about tables for Guam and how they are arranged in the data files.
xls Table Matrix and Segments: U.S. Virgin Islands
Information about tables for the U.S. Virgin Islands and how they are arranged in the data files.

Resources Related to Geographic Concepts

xls Geographic Header Record: American Samoa, Commonwealth of the Northern Mariana Islands, Guam
Lists each field and provides its data dictionary reference name, maximum field size, and data type.
xls Geographic Header Record: U.S. Virgin Islands
Lists each field and provides its data dictionary reference name, maximum field size, and data type.
pdf Data Dictionary for Geographic Header
Information about interpreting the records and geographic codes within the data.
xls Summary Level Hierarchy Chart
Displays the hierarchical relationships among the summary levels in this summary file.
xls Summary Level Sequence List
Information about the summary levels in the summary file and the geographic components associated with each summary level.

Additional Resources

pdf Accuracy and Confidentiality of the Data
A high-level overview of data collection methodology, confidentiality protections, and accuracy of the data.
pdf Residence Criteria and Resident Situations
Criteria that are used to determine where people are counted during the census.
pdf Questionnaire
Informational questionnaires used during the 2020 Island Areas Censuses.
pdf User Notes and Errata
Issues affecting the 2020 Island Areas Censuses, including design, collection, production, and release, to be better informed when analyzing statistics.
Top of Section

pdf Technical Documentation: Detailed Cross Tabulations
Complete technical documentation, including access to the table and geographic information listed on this webpage.
pdf Additional Guidance on Using the Island Areas Censuses Detailed Cross Tabulations
Information about differences between table universes and the availability of specific geographies in the Detailed Cross Tabulations.
xls List of Tables and Table Shells: American Samoa
Information about tables for American Samoa and how they are arranged in the data files.
xls List of Tables and Table Shells: Commonwealth of the Northern Mariana Islands (CNMI)
Information about tables for the CNMI and how they are arranged in the data files.
xls List of Tables and Table Shells: Guam
Information about tables for Guam and how they are arranged in the data files.
xls List of Tables and Table Shells: U.S. Virgin Islands
Information about tables for the U.S. Virgin Islands and how they are arranged in the data files.
xls Table Finding Guide
High-level index designed to quickly identify the data tables available on the U.S. Census Bureau’s data exploration platform, data.census.gov.

Additional Resources

pdf Accuracy and Confidentiality of the Data
A high-level overview of data collection methodology, confidentiality protections, and accuracy of the data.
pdf Residence Criteria and Resident Situations
Criteria that are used to determine where people are counted during the census.
pdf Questionnaire
Informational questionnaires used during the 2020 Island Areas Censuses.
pdf User Notes and Errata
Issues affecting the 2020 Island Areas Censuses, including design, collection, production, and release, to be better informed when analyzing statistics.
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Page Last Revised - September 8, 2022
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