Census > ACS Main > About the ACS > Sample Selection |
The American Community Survey (ACS) began full implementation of housing unit address in 2005. Since 2005, the ACS interviews samples of housing units in all counties in the United States (including the District of Columbia) and in all of the municipalities in Puerto Rico. Each year approximately 3 million housing unit addresses in the United States and Puerto Rico are selected. In 2006 the ACS began interviewing residents in group quarter (GQ) facilities. Samples for GQ facilities and persons are selected independently within each state, including the District of Columbia and Puerto Rico. Each year approximately 2.5 percent of the expected number of residents in GQ facilities are included in the ACS. For more information on the methods and procedures of the ACS, please see the ACS Design and Methodology paper [PDF 7.4MB]. |
||||||
[PDF] or denotes a file in Adobe’s Portable Document Format. To view the file, you will need the Adobe® Acrobat® Reader available free from Adobe. This symbol indicates a link to a non-government web site. Our linking to these sites does not constitute an endorsement of any products, services or the information found on them. Once you link to another site you are subject to the policies of the new site. |