The American Community Survey (ACS) is the largest household survey in the United States, with an annual sample size of about 3 million addresses. Every year the ACS supports the release of single-year estimates for geographic areas with populations of 65,000 or more.
This release of the American Community Survey Production Summary file (ACS-SF) contains the 2008 detailed tables (a.k.a. "base tables"). Please send any comments you have via email to: firstname.lastname@example.org. We will keep users aware of any updates via the ACS Alert from the ACS website.
The 2006, 2008, and 2008 data products include the Group Quarters (GQ) population. The GQ population includes all people not living in households. ACS data were collected from residents who were currently residing in the GQs when the ACS was conducted at that location. Data are collected at two types of group quarters: institutional, including residences such as correctional facilities, nursing homes, and psychiatric hospitals; and non-institutional, which include residences such as college dormitories, military barracks, group homes, and shelters.
Every table that should be a "total population" table will include the GQ population. But, tables describing household characteristics will not include GQ data. For example, tables such as Median Household Income, will only have data from the population living in households.
The ACS-SF contains sample data, which is information about the characteristics of local communities compiled from the questions asked of a sample of people and housing units. The ACS covers a broad spectrum of geographic areas in the United States and Puerto Rico. The topics listed below are covered by the ACS and focus on demographic, social, housing, and economic characteristics.
|Households by type
||Residence one year ago
|U.S. citizenship status
||Language spoken at home
||Place of birth
|Year of entry
|Grandparents caring for children
||World region of birth of foreign born
||Commuting to work
|Class of worker
||Income and benefits
|Units in structure
||Year structure built
|Number of rooms
||Number of bedrooms
|House heating fuel
|Occupants per room
|Mortgage status and costs
|Year householder moved into unit
The Census Bureau uses the data collected by the ACS to create estimates and variances, which are termed statistics, for these characteristics. The statistics produced from the ACS describe the characteristics of population and housing in the United States and Puerto Rico. The ACS releases statistics in several forms - totals, proportions, percentages, means, medians, averages, and ratios. There are three sets of data files in identical format with one field per estimate. One file contains the estimates, the second file contains the standard errors, and the third file contains the margin of error.
The ACS-SF contains a total of 1374 unique detailed tables. Of these tables, ID's beginning with the letter "C" are collapsed versions of tables (i.e. these tables have fewer detailed cells). These detailed tables include both U.S. and Puerto Rico population and housing characteristics for the housing unit population and for a limited list of race and Hispanic or Latino groups. Population and housing items may be cross tabulated. Selected aggregates and medians are also provided. A complete listing of subjects in this file is found in the section, "Subject Locator."