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
- Supervisorial Disricts (2011) – Adopted – For LA County staff with direct access to the Enterprise GIS Repository.
- Supervisorial_District_Boundaries-2011 (zipped shapefile)
- Redistricting_units_2011 (zipped shapefile) – includes information about the 2010 Census Tract, City,Community, 2001 district, and 2011 district. This was dissolved to create the 2011 Supervisorial Districts.