Statistics & Data for the Social Sciences

Current and historical U.S. census data and demographic information. The easy-to-use web interface lets users create maps and reports.

Scanned versions of the published volumes covering 1789-2011.

Historical decennial census publications in pdf format from 1790 to present.
"Special Collections & Reports" link provides access to additional historical census bulletins and data such as for imports & exports, manufactures, and religious bodies.

Canada
For most provinces, includes the census returns of 1851, 1861, 1871, 1881, 1891, 1901, 1906, 1911 and 1916, and list each person by name with the following details: age; sex; country or province of birth; religion; racial or ethnic origin; occupation; and marital status.
Links to additional Canadian census sources.

Great Britain
The Online Historical Population Reports (OHPR) collection provides online access to the complete British population reports for Britain and Ireland from 1801 to 1937.

Ireland
Includes recent and historical Irish census data. The Censuses of 1901 and 1911 are available online in full, while aggregate data is available in pdf form for 1926-1991. Interactive tables are available for 1996, 2002, and 2006. 2011 data will be included as it becomes available.