2026 GENERAL
U.S. House · California · 4th District
Santa Rosa, Vacaville, Napa · One seat · current holder Mike Thompson (D) · 7 candidates declared
Voter reg deadline—
Early voting opens—
Election day● Nov 3, 2026
Runoff (if needed)—
Candidates
Republican
Republican
No positions taken yet.
Republican
No positions taken yet.
Republican
No positions taken yet.
Republican
No positions taken yet.
Democratic
Democratic
No positions taken yet.
Democratic
No positions taken yet.
Mike ThompsonIncumbent
DemocraticNo positions taken yet.