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.