Highlights:
- 6th Decennial Census.
- U.S. Population: 17,069,458.
- Cost: $833,371.
Questions:
The 1840 census asked the same questions as the 1830 census. Each head of family was listed and asked:
- The number of free White males and females, respectively:
- under 5 years
- 5 to 10 years
- 10 to 15 years
- 15 to 20 years
- 20 to 30 years
- 30 to 40 years
- 40 to 50 years
- 50 to 60 years
- 60 to 70 years
- 70 to 80 years
- 80 to 90 years
- 90 to 100 years
- 100 years and upward
- The number of slaves and free colored persons of each sex, respectively:
- under 10 years
- 10 to 24 years
- 24 to 36 years
- 36 to 55 years
- 55 to 100 years
- 100 years and upward
- The number of White persons and of "slaves and colored persons" who were deaf and dumb aged:
- under 14 years
- 14 and under 25 years
- 25 years and upward
- The number of White persons and "slaves or colored persons" who were blind, respectively
- The number of White persons who were foreigners not naturalized