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.

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.

City Boundaries and City Annexations provide current and historical legal city boundary information on this portal.