Districts
Congressional District 4
Congressional District 4, California, is represented by Mike Thompson (U.S. Representative CA-4), on the roster read 2026-09-20.
Congressional District 4 is a congressional district in California. Contact details are as the sources publish them.
- Type
- congressional district
- State
- California
- Census identifier
- 0604
- Officeholders Rallybase holds
- 1
- Roster read on
Who holds a seat in Congressional District 4
- Mike ThompsonU.S. Representative, CA-4 · Democrat · 202-225-3311
What you can do from here
- Write to your representativesRallybase composes the letter; sending it yourself is free
- Find every government that covers your addressA ZIP straddles districts, so this asks for a point rather than a ZIP
What Rallybase does not know here
- How many people live here. We store the boundary and no population figure with it.
- When this body next meets. We hold meetings for the markets whose calendars we sync, and none attached to this district.
- How this district was drawn, when it was last redistricted, and who drew it. We hold the boundary as the Census publishes it and none of its history.