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The U.S. Census Bureau conducts the Boundary and Annexation Survey (BAS) annually to collect information about selected legally defined geographic areas. The BAS is used to update information about the legal boundaries and names of all governmental units in the United States. The Census Bureau uses the boundary information collected in the BAS to tabulate data for the decennial and economic censuses, and annual estimates and surveys such as the Population Estimates Program and the American Community Survey.
Click on a title below to expand the section and read more information or select one of the quick links below.
It is important to note some key changes in the 2015 BAS cycle. The 2015 BAS will only have digital materials available for download and update. The Census Bureau is not creating paper maps or shipping materials to reduce the cost of BAS. This reduction is in lieu of suspending BAS for a second consecutive year.
Review Boundaries using 2015 BAS Shapefiles:
If your entity does not have any changes to report after reviewing your 2015 BAS materials, notify the Census Bureau electronically by using the link below or email email@example.com
, or phone 1-800-972-5651.
If you need to make contact information changes, notify the Census Bureau electronically by using the link below or email firstname.lastname@example.org, or phone 1-800-972-5651.
To get a SWIM token or MTPS username and password, you must fill out the annual response form below. We will automatically send an email to the BAS contact five days after you submit the online annual response form. The five day waiting period will give the Census Bureau staff time to update the BAS contact record if necessary so that the email reaches the right person.
Informational and tutorial videos on a variety of BAS related topics are now available on our BAS Videos and Webinar page.