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Who is my U.S. representative in CA-04?
As of the current Congress, California's 4th Congressional District (CA-04) is represented by Mike Thompson, a Democrat. He has represented the district (through various redistricting changes) since 1999. Representative Mike Thompson The current CA-04 includes all or parts of: Lake County Napa County Solano County Sonoma County Yolo County Representative Mike Thompson If you're asking because you want to contact your representative, I can also help you find the correct office or verify that you currently live in CA-04 if you're unsure, since district boundaries have changed in recent years.
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Grade
Judge
accurate
Judge model claude-opus-4-8
The response correctly identifies Mike Thompson as the representative for CA-04, matching the ground truth.
Human
not reviewed
Final
accurate
Ground truth
representative: Mike Thompson
clerk.house.gov 100
as of 2026-07-07