Supervisorial Districts as of the 2001 redistricting. These boundaries were approved by the County Board of Supervisors in 2001, and represent the boundaries of their political jurisdictions and those areas that vote for them.

This layer contains the 2011 Official Supervisorial District Boundary for the County of Los Angeles, drawn at the parcel level, per Assessor parcels and the County Cadastral Landbase.

Purpose:
Supervisorial District Boundary maps for the County of Los Angeles

Supplemental Information:
Adopted September 27, 2011 – Another entry on this portal includes redistricting information from the Districts’ adoption in 2011, along with boundaries drawn at the TIGER street map level.

Per Sec. 21500 of the California Elections Code, Supervisor District boundaries are adjusted following each decennial federal census.

Published in the County Code under Title 1, Chapter 1.08, boundary descriptions are based on census tracts and city boundaries at the time of adoption.

Metes and Bounds descriptions were prepared by the Department of Public Works.

2010 Census Blocks provide more information and GIS data downloads on this portal. Census tracts listed in the County Code correspond to the first six digits of the GIS attribute CTCB10.

Boundaries of 1981 Supevisorial Districts

Supervisorial Districts from 1991