How-to Materials for Using the Microdata Access
How-to Materials for Using the Microdata Access
Do you have questions on how to use Microdata Access? Check out our step-by-step guidance to learn how to use Microdata Access to create your own tabulations.
Featured Resource
Webinars
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Exploring the Refreshed Microdata Access Tool (MDAT)Discover the newly refreshed Microdata Access Tool (MDAT) from the U.S. Census Bureau!
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Taking the Guesswork Out of MDATGet a guided tour of the Census Bureau's Microdata Access Tool (MDAT) and learn how to create customized tables not available through data.census.gov.
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Deep Diving into the Microdata Access Tool (MDAT)In this workshop, we will go through some hands-on-exercises using the MDAT to customize our tabulations.
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Using Public Microdata to Create Custom Tables on data.census.govIn this webinar, you will learn how to create custom tables using public use microdata, customize your view, download the data, and provide your feedback.
Video Tutorials
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VideoUsing Dual Vintage PUMAs in the Microdata Access ToolMarch 18, 2025In this companion video tutorial, we'll walk you through the process for getting data for Dual Vintage PUMAs using the 2022 ACS 5-Year PUMS in MDAT.
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VideoDual Vintage PUMAs in the ACS 5-Year PUMSMarch 18, 2025In this tutorial we’ll help you understand the concept of Dual Vintage PUMAs in the ACS 5-Year PUMS.
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VideoExploring the Refreshed Microdata Access Tool (MDAT)December 17, 2024Learn how to navigate the newly refreshed Microdata Access Tool (MDAT)!
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VideoBuilding a Custom Table Using MDATJanuary 09, 2023Watch this video to learn how to use Microdata Access (MDAT) through data.census.gov, and create customized tabulation.
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Data GemLearn the First Steps to Creating Your Own Tabulation Using MicrodataDecember 10, 2020In this Data Gem we will show you the first steps to creating your own tabulation using the Microdata Tabulation Tool at data.census.gov.
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Data GemWhat is Microdata and Why Should I Use It?August 18, 2020Microdata are a set of untabulated records about individual people or housing units that can be used to create custom tables.
Data Availability
Transition from DataFerrett
DataFerrett was decommissioned and taken offline on June 30, 2020. Data previously available on DataFerrett are now being released on the U.S. Census Bureau's new dissemination platform, Microdata Access. Since we are a developing site, not all the data from DataFerrett have been migrated over to Microdata Access. Below is an overview of our data migration status that will be updated regularly.
DataFerrett Data Sets Coming Soon to Microdata Access
Older Data Sets Not Available on Microdata Access
Survey of Program Dynamics
| Dataset | Vintage | Find It Here: |
| Cross-Sectional | 1999 - 2002 | SPD |
Decennial Census of Population and Housing
| Dataset | Vintage | Find It Here: |
| General | 1880, 1910, 1920 1940, 1950, 1960 |
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| Free Population | 1850 | |
| Free Population | 1860 | |
| General | 1870 | |
| General Sample - Minnesota | 1900 |
National Survey of Fishing, Hunting, and Wildlife Associated Recreation
| Dataset | Vintage | Find It Here: |
| Screening File | 2001, 2006 |
and |
| Sportsperson File | 2001, 2006 | |
| Wildlife Watching File | 2001, 2006 |
Data Dictionaries and Related Documentation
Take Action
As we continue to develop new functionalities like search by address and advanced printing and download options, please let us know what features are important to you.
Please send your questions or comments on data.census.gov, Census API, or Microdata Access to census.data@census.gov