Demographic Data
| Demographic data refer to the Decennial Census and other surveys of individuals and households administered by the Census Bureau. Compared to their public use counterparts, the internal data files include more detailed geographic information, generally to the block level for the Decennial Census and census-tract level for surveys, as well as less restrictive top-coding. The following table lists person and household based data, the frequency of data collection, the unit of enumeration, the years of data available at CES, and the sponsoring federal agency. Access to these data will only be granted to qualified researchers on approved projects with authorization to use specific data sets. All researcher access to restricted–use data occurs at one of the secure Census Research Data Centers. Some Census Bureau data collections are sponsored in whole or in part by other federal agencies. Sponsorship of data collections may also change over time. External research projects using these data may require permission of the sponsoring agency. |
| Data Set | Frequency | Unit of Enumeration | Availability | Sponsor |
|---|---|---|---|---|
| American Community Survey (ACS) | Annually |
Housing Unit |
1996–2010 |
Census Bureau |
| American Housing Survey (AHS) | Annually |
Housing Unit |
1984–1999, 2001–2005, 2007, 2009 |
|
| Current Population Survey - March Supplement (CPS) | Annually |
Household |
1967–2011 |
Census Bureau and Bureau of Labor Statistics (BLS) |
| Decennial Census | Every Ten Years |
Household |
1970, 1980, 1990, 2000 |
Census Bureau |
| National Crime Victimization Survey (NCVS) | Annually |
Household |
2008–2010 |
|
| National Longitudinal Mortality Study (NLMS) | Variable |
Individual |
Through 1998* |
|
| National Longitudinal Survey (NLS) | Annually |
Individual |
1966–1999 |
|
| Survey of Income and Program Participation (SIPP) Longitudinal | Variable |
Household |
1984–1988, 1990–1993 |
Census Bureau |
| Survey of Income and Program Participation (SIPP) Panels | Monthly |
Household |
1984–1993, 1996, 2001, 2004, 2008 |
Census Bureau |
* The National Longitudinal Mortality Study (NLMS) is a unique research database based on a random sample of the non-institutionalized population of the United States. It consists of U.S. Census Bureau data from Current Population Surveys, Annual Social and Economic Supplements and a subset of the 1980 Census combined with death certificate information to identify mortality status and cause of death. The cohorts begin at various dates from 1973 through 1998 matched to death records dating through 1998.
In addition to the years and surveys listed on this page, thousands of tapes containing historic data were recently recovered and remain in an undeveloped state. For information on these data, see our Recently Recovered Data page.
Microdata are data at the level of the establishment, firm, individual, or household that are collected through census and survey programs.
Census Research Data Centers (RDCs) are U.S. Census Bureau facilities, staffed by a Census Bureau employee, which meet all physical and computer security requirements for access to restricted–use data. At RDCs, qualified researchers with approved projects receive restricted access to selected non–public Census Bureau data files.
In addition to the data shown on this page, historic data from thousands of tapes were recently recovered and remain in an undeveloped state. For information on these data, see our Recently Recovered Data page.