Decennial Census of Population and Housing

Technical documents are written materials designed to help people use published statistics. While much of the information is common to experts and specialists, the goal of a technical document is to explain things to the general reader who knows little or nothing about the topic.

Complete technical documents may include any of the following resources:

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.

Help Guides - These documents explain changes to tables, geography, disclosure, variance estimation, and more.

Historical Changes - Information for the current survey year and prior survey years is available here.

Methodology - The methods we use to collect and produce the census, survey, or program, 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 or survey.

User Notes - Learn more about issues affecting the census, survey, or program, including design, collection, production, and release, to be better informed when analyzing stats.