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2015 Boundary and Annexation Survey (BAS)

The deadline for 2015 BAS submissions was 5/31/2015. Submissions received after this date are not guaranteed to be included in 2016 BAS Materials. BAS 2016 will start in December 2015.

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.

What's New?

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.

  • All BAS submissions must be submitted via the Secure Web Incoming Module (SWIM). No other methods or protocols (e.g. email or ftp) are allowed because of Census IT security policy. To get a SWIM token, you must Respond Online. An email will be sent to the BAS contact five days after you complete the form. For further information please refer to our Respondent Guides.
  • BAS participants reporting boundary changes (annexations or deannexations) are required to include the authorization type (i.e. resolution, ordinance, local law, state level action or other) in the AUTHTYPE field. All other required data for boundary changes is unchanged.
  • All BAS submissions must be digital. This requires the participant to use either their own Geographic Information System (GIS) or the Census Bureau’s free MAF/TIGER Partnership Software (MTPS) with the Census Bureau provided shapefiles in order to properly make and submit BAS changes.
  • There will be no Paper BAS option. There are no 2015 BAS maps available on paper or online.
  • There will be no physical mail out of BAS materials (i.e. Respondent Guides, shapefile data and the MTPS software). You must download the materials for the 2015 BAS using the links below.

Review BAS Materials

Review Boundaries using TIGERweb [PDF]

TIGERweb Application

Review Boundaries using 2015 BAS Shapefiles:


Review Boundaries using the Census Bureau's MAF/TIGER Partnership Software (MTPS) Tool

Report 'No Change' After Review of Materials

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 , or phone 1-800-972-5651.

Respond Online

Submit Contact Information Changes, Request a SWIM Token, or Request MTPS Username and Password

If you need to make contact information changes, notify the Census Bureau electronically by using the link below or email, 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.

Respond Online:  Submit Contact Updates, Request a SWIM token, Request MTPS Username and Password

Report BAS Changes

BAS Tutorial Videos and Webinar Information

Informational and tutorial videos on a variety of BAS related topics are now available on our BAS Videos and Webinar page.



Related Program Links     Frequently Asked Questions (FAQs)     Contact Information

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Source: U.S. Census Bureau | Geography | (301) |  Last Revised: July 27, 2015