Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

Census Research Guide: 1840

About the 1840 Census

Census Bureau's "By Decade" website

Includes a variety of publications, questionnaires, datasets, and more


  • 6th decennial census
  • US population: 17,069,453
  • First census to include questions about education

Questions asked (see questionnaire)

Name of head of family; age; sex; race; slaves; number of deaf and dumb; number of blind; number of insane and idiotic and whether in public or private charge; number of persons in each family employed in each of six classes of industry and one of occupation; literacy; pensioners for Revolutionary or military service.

Map coverage of the 1840 census


Find all 1840 census publications in the Library.

Key publications:

Print available in the Library

 Online access

Sixth Census
[C 3.14:840/1/reprint]


Statistics of the United States of America
[C 3.14:840/2/reprint]


Census of Pensioners for revolutionary or military services
[ C 3.14:840/3]

 Census Bureau

[C 3.14:840/2]

 Census Bureau