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Historic LA County Supervisorial Districts (1971 – 1991)

Supervisorial District Boundaries for LA County for 1971, 1981, and 1991.

 Samples (click to enlarge)




The data from 1991 was provided by the Registrar/Recorder.

The data from 1971 and 1981 was digitized from scanned and rectified County Engineer maps provided by the Department of Public Works.

  1. Download the Ortho rectified 1971 County Engineer’s Map (zipped geo-tiff)
  2. Download the Ortho rectified 1981 County Engineer’s Map (zipped geo-tiff)
 Engineer Maps (click to Enlage)

1971 Map

1981 Map


Download/Access the GIS Data

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


Using GIS Data on this site

GIS Data downloaded from this site generally requires GIS software to view. Click here for a list of GIS Data Viewers

GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions
  • DISTRICT - Supervisorial District Number

GIS Source Information
Feature Dataset Name (if applicable):
Reference Date: 1971, 1981, 1991
Accuracy: Parcel
Update Frequency: Unknown
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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