American Community Survey (ACS)


The American Community Survey (ACS) is a continuos nationwide survey that samples approximately 3 million addresses per year.  It covers the same type of detailed information previously collected by, thus replaces, the long form of decennial censuses. The purpose of the ACS is to provide a fresh look at how communities are changing over time.  Note, however, that while the ACS collects both population and housing data, it does not provide the official community's population estimates.  The Census Bureau's Population Estimates Program will continue to be the official source for annual population estimates by age, race, Hispanic origin, and gender. In general, the ACS provides a portrait of the community’s characteristics, thus does a better job estimating percents, rates, means, and medians than it does totals.

Since samples are drawn independently every year, the ACS can combine the multi-year samples and use them to provide multi-year estimates.  In addition to providing annual estimates, the ACS provides also 3-year period and 5-year period estimates.  The 5-year period estimates provide population and housing estimates for all regions in the U.S., down to the block groups.


ACS Data:

ACS Demographic Profiles (Quick Tables) by State and County, from ACS 2007 through ACS 2010

ACS Subject Tables (Age-Sex, Education, Fertility, Marital Status, Occupation, etc.) by State and County:


Other information about ACS: