The American Community Survey (ACS) is a top source for information about the United States' population, housing, and workforce. It is frequently used by policymakers to obtain detailed information about specific communities. The ACS is the largest household level survey conducted by the Census Bureau.
The GSS contains a standard 'core' of demographic, behavioral, and attitudinal questions, plus topics of special interest. Many of the core questions have remained unchanged since 1972 to facilitate time-trend studies as well as replication of earlier findings.
The Integrated Public Use Microdata Series (IPUMS-USA) consists of samples of the American population drawn from federal censuses and from the American Community Surveys of 2000-2012. These samples, which draw on every surviving census from 1850-2000, and the 2000-2012 ACS samples, collectively constitute our richest source of quantitative information on long-term changes in the American population.
Compilation of over 37,000 statistical series from over 1,000 sources. All tables include citations to data sources and descriptions of data anomalies. Each major section includes a signed essay that puts the statistics in historical context.