California's 1st congressional district is a congressional district in the U.S. state of California. The district is represented by Republican Doug LaMalfa since 2013. Before LaMalfa has taken office, 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.