U.S. House · Proposition 50 Lines

Congressional District 1

Member-elect: Mike McGuire (Democratic)

Who represents this district

Mike McGuire (Democratic), member-elect. The new term begins January 3, 2027.

Current officeholder: James Gallagher (Republican), in office until the new term begins. The incumbent ran for re-election and lost.

Counties and cities

Counties: Butte, Glenn, Lake (partial), Lassen, Mendocino (partial), Plumas, Sierra, Sonoma (partial), Tehama

Principal cities and communities:

Santa RosaChicoWindsorOrovilleClearlakeUkiahRed BluffSusanville

Voter registration

Registered voters	Democratic	Republican	Other
457,227	40.75%	31.05%	28.21%

Secretary of State Report of Registration, September 4, 2026. Other covers every registrant not registered Democratic or Republican.

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Registration: California Secretary of State, Report of Registration, September 4, 2026. 2026 results: Associated Press calls for U.S. House races; state legislative results compiled from Ballotpedia and JoinCalifornia against semi-official returns. District lines: congressional districts are the Proposition 50 (AB 604) map; State Senate and Assembly districts are the 2021 Citizens Redistricting Commission maps.