About District 1

The counties and political makeup of far-Northern California’s congressional region

The counties in California’s District 1.

The counties in California’s District 1.

California’s 1st Congressional District includes the counties of Butte, Lassen, Modoc, Plumas, Shasta, Sierra, Siskiyou and Tehama, as well as parts of Glenn, Nevada and Placer counties.

Voter registration rolls, as of May 2018, indicate the district comprises the following: