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### Demographic FAQs

### Also in this Section:

                          - What day was the census taken each decade?
                          - When was Puerto Rico first included in a census of the United States?
                          - When was the first census in the United States?
                          - When did the U.S. Census Bureau begin using statistical sampling?
                          - Why do the schedules used in the 1790-1820 censuses differ?
                          - When did the U.S. Census Bureau begin collecting housing data?
                          - Have census records always been confidential?

## What day was the census taken each decade?

From 1790 to 1820, the censuses were conducted as of the first Monday in August (August 2, 1790; August 4, 1800; August 6, 1810; August 7, 1820); the 1830-1880 and 1900 censuses were as of June 1; the 1890 census was as of June 2; April 15 was Census Day in 1910; and the 1920 census was as of January 1.  Since 1930, Census Day has been April 1.

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Measuring America's People, Places, and Economy

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