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2011 Supervisorial District Boundaries (Adopted September 27, 2011)

Approved Boundaries

This GIS data file contains 2011 County Board of Supervisors district boundaries adopted September 27, 2011.

For full details of the process , please see this site: http://redistricting.lacounty.gov/.  The 2011-Board-Adopted-Plan (pdf file) is loaded here for your convenience.

These boundaries are based upon Redistricting Units (RDUs) which in turn originated from the 2010 Census TIGER file – they are accurate to the Census Bureau.  I anticipate that in the future,  County departments (including the Registrar/Recorder) will be enhancing the spatial accuracy of this set of boundaries to more accurately follow legal city Boundaries and physical features that are represented in other County GIS data.

However, the County has tested and found the Census Bureau’s data to substantially accurate for even large-scale mapping, so future changes will not dramatically impact mapping, but I do recommend coming back to this page to check for updates.

Download/Access the GIS Data

Each of the files below contains all three supervisorial district boundaries in one file

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Data Field Descriptions
  • DISTRICT - the Supervisorial District

GIS Source Information
Database Name:
Feature Class Name:
Feature Dataset Name (if applicable):
Reference Date: 2011
Accuracy: TIGER
Update Frequency: As Needed
Access Constraints:None

Contact Information
Steve Steinberg
Geographic Information Officer
County of Los Angeles
Internal Services Department
9150 E. Imperial Hwy, MS#3
33.916650, -118.132255
Downey, CA 90242
(562) 392-7126

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