The NHGIS contains aggregated census data and GIS boundary files for Census administrative areas between 1790 and 2011. Census tracts were initially only used to break down larger cities and over time were used for the entire United States. Census tracts are meant to contain on average about 4,000 residents and therefore their boundaries change over time.
create maps and reports from census statistics.
1790 to 1930: county, state, and national level decennial census data.
1940-2010: census tract, county, state, and national level decennial census data.
2006 to the present: American Community Survey
annual data down to county subdivision
census tracts, block groups: 5-year estimates
Social Explorer provides easy access to demographic information about the United States, from 1790 to present. It allows you to easily create visual maps and reports for a variety of variables.
Integrated Public Use Microdata Series; an integrated set of data spanning more than 50 years (1962-forward) of the Current Population Survey (CPS). The CPS is a monthly U.S. household survey conducted jointly by the U.S. Census Bureau and the Bureau of Labor Statistics.
The Inter-university Consortium for Political and Social Research [ICPSR] archives and disseminates census data acquired from the United States Census Bureau as well as files prepared by ICPSR and other principal investigators. Both microdata and aggregate data constitute ICPSR's census holdings.
Intended to increase the usefulness of Henry J. Dubester's standard bibliography of historical U.S. census publications (Catalog of United States Census Publications, 1790-1945), this work adds a section of supplemental entries (including SuDocs classification numbers) to the original bibliography and subject index. This section is followed by Dubester's original subject index, then by indexes not found in his original bibliography-title, series and report number, and SuDocs classification number.
an annotated bibliography of the historical censuses and current vital statistics of the 21 American Republics, the American Sections of the British Commonwealth of Nations, the American Colonies of Denmark, France, and the Netherlands, and the American Territories and Possessions of the United States; prepared under the supervision of Irene B. Taeuber.
The county has always been used as the basic Federal census unit. This work shows all U.S. county boundaries from 1790 to 1920. On each of the nearly 400 maps the old county lines are superimposed over the modern ones to highlight the boundary changes at ten-year intervals. Also included are (1) a history of census growth; (2) the technical facts about each census; (3) a discussion of census accuracy; (4) an essay on available sources for each state's old county lines; and (5) a statement with each map indicating which county census lines exist and which are lost.
statistics compiled from publications, schedules, and unpublished manuscript tables of he Census Bureau covering "racial experience under the conditions imposed by slavery and under the no less difficult conditions imposed by emancipation and freedom".