Decennial 1990
Summary Files
ALERT:
The U.S. Census Bureau identified a problem with tract numbers within the block group summary level in the 1990 Decennial SF1 API endpoint. The tract listed with the block group was sometimes incorrect. This resulted in some data being placed in the incorrect tract within the block. The U.S. Census Bureau has removed all of the block group data that was available for this endpoint. Data for tracts were processed correctly. We hope to correct this error and publish the API with block groups in the future.
Please contact us via email at [email protected] with any questions.
NOTE: Puerto Rico data may available at a later time.
Summary File 1:
- API Call: api.census.gov/data/1990/sf1?
- 1990 SF1 API Variables [ html | xml ]
- 1990 Census Documentation
- Supported Geography
Summary File 3:
- API Call: api.census.gov/data/1990/sf3?
- 1990 SF3 API Variables [ html | xml ]
- 1990 Census Documentation
- Supported Geography
Related Information
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Developers' ForumNeed help? Check out our Developer Forum to submit questions, share your apps, and provide feedback.
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FTP ServerTo download full datasets, visit our FTP Server.
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Decennial Census of Population and HousingThe U.S. census counts every resident in the United States. It is mandated by Article I, Section 2 of the Constitution and takes place every 10 years.
Page Last Revised - May 26, 2026