Sensus Amerika Serikat 1840
Segel Biro Sensus Amerika Serikat
Informasi umum
Negara	Amerika Serikat
Tanggal diambil	01 Juni 1840 (1840-06-01)
Total populasi	17.069.453
Perubahan persen	32.7%
Negara bagian paling padat	New York 2.428.921
Negara bagian paling kurang padat	Delaware 78.085

Sensus Amerika Serikat 1840 adalah sensus Amerika Serikat keenam. Dilakukan Census Office pada 1 Juni 1840, sensus tersebut menyatakan bahwa penduduk tetap Amerika Serikat berjumlah 17.069.453 – meningkat 32.7 persen dari 12.866.020 orang yang dihitung pada sensus tahun 1830. Total populasi tersebut meliputi 2.487.355 budak.

• "1840 census: False count on insanity showed slavery was good for Blacks" by Peter Whoriskey, The Washington Post, October 17 2020
• Compendium of the Enumeration of the Inhabitants and Statistics of the United States . . . from the Returns of the Sixth Census .... (Washington, D.C., 1841)
• Overview of the 1840 Census on www.census.gov.
• 1840 U.S. Federal Census - Online Records and Indexes on www.cyndislist.com (21 Links) Includes links to sites with any or all of the following: digitized images, indexes, transcriptions, extractions, abstracts, and partial or whole copies of census materials.