Known Issues in the U.S. 1790-1840 Complete Count Data

Below is year-specific documentation on some of the issues existing in the 1790-1840 datasets. There are many cases where household-level variables do not match the county totals. Some of the issues will be corrected for the final release, but others are permanent issues in the data. Please email ipums@umn.edu if you find data errors or issues that are not covered in this documentation or if you have any questions.

Household-Level Data Completely or Partially Missing by Year
Year # of Households* States Counties Partial Counties
1790 11,572
1800 3,327
1810 -
1820 6,937 -
1830 14,210 - -
1840 47,796 - - -
*Some households have no data due to illegibility and may appear to have zero people living in them. This number does not include households that are missing due to a lack of data from a particular state or county.
**Washington County, Ohio is the only area available in the Northwest Territory in 1800.
***Van Buren, Michigan is in the data but is only one household and is not identified in Van Buren County.
****These areas in Oxford, Maine are included in the data but not identified because of multiple geography descriptions on enumeration sheets.

1790

1800

1810

1820

1830

1840

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