Compare Supervisorial Districts Over Time

To view and compare the changes in county supervisorial district boundaries from 1981 to 2011, click here.  

Supervisorial District Map Shapefiles

Use the buttons below to download the 2011 and 2021 Supervisorial District Map shapefiles.

2011 Shapefiles        2021 Shapefiles


Find Your District

To find your district, use the app below, or click here.