California's 1st congressional district

California's 1st congressional district is a congressional district in the U.S. state of California. The seat has been vacant since the death of Republican U.S. Representative Doug LaMalfa in 2026. Before LaMalfa, the district had not had a Republican congressman since 1998. 

The district is made up of the counties: Butte County, Lassen County, Modoc County, Plumas County, Shasta County, Sierra County, Siskiyou County, Tehama County, most of Nevada County, part of Glenn County and part of Placer County.

Election history

References

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