California's 1st congressional district
Interactive map of district boundaries since 2023 (Used in the2022 elections)
Representative	Doug LaMalfa R–Oroville
Population (2024)	759,259[1]
Median household income	$69,829[2]
Ethnicity	61.5%White 22.5%Hispanic 6.1%Two or more races 5.6%Asian 1.8%Native American 1.7%Black 0.8% other
Cook PVI	R+12[3]

California's 1st congressional district is aU.S. congressional district inCalifornia.Doug LaMalfa, aRepublican, has represented the district since January 2013. Currently, it encompasses the northeastern part of the state. Since the 2022 election, it includes the counties ofButte,Colusa,Glenn,Lassen,Modoc,Shasta,Siskiyou,Sutter, andTehama, and most ofYuba County. The largest cities in the district areChico,Redding, andYuba City.^[1]

Prior to redistricting in 2021, it included the counties ofButte,Lassen,Modoc,Plumas,Shasta,Sierra,Siskiyou, andTehama, most ofNevada County, part ofGlenn County, and part ofPlacer County. In the 2021 redistricting, it added theYuba–Sutter area and removed most of its share of theSierra Nevada.^[4]

Prior to 2013, the GOP last held the seat in 1998 whenU.S. RepresentativeFrank Riggs decided to run for theU.S. Senate. Riggs was replaced by long-time DemocraticAssemblyman andState Senator Mike Thompson. Redistricting in 2001 added Democratic-leaning areas ofYolo County.

John Kerry won the district in2004 presidential election with 59.7% of the vote.Barack Obama carried the district in2008 presidential election with 65.60% of the vote. The redistricting after the 2010 census made the district much more Republican-leaning; Mitt Romney and Donald Trump won the district by double digits in 2012, 2016, and 2020 respectively.

Under the 2020 redistricting, California's 1st district is located in northeastern California, encompassingButte,Colusa,Glenn,Lassen,Modoc,Shasta,Siskiyou,Sutter, andTehama Counties, as well as partYuba County. The area in Yuba County includes the cities ofMarysville andWheatland; and the census-designated places ofBeale AFB,Linda,Olivehurst, andPlumas Lake.

Yuba County is split between this district and the3rd district. They are partitioned by State Highway 70, Ellis Rd, and Union Pacific.^[9]

• Chico – 101,000
• Redding – 93,611
• Yuba City – 70,117
• Linda – 21,654
• Oroville – 20,042
• Susanville – 16,728
• Olivehurst – 16,595
• Red Bluff – 14,710
• Marysville – 12,844
• Anderson – 11,323
• Shasta Lake – 10,371

• Live Oak – 9,106
• Corning – 8,244
• Plumas Lake – 8,126
• Oroville East – 8,038
• Magalia – 7,795
• Yreka – 7,807
• Orland – 7,622
• Gridley – 7,421
• Thermalito – 7,198
• Colusa – 6,411
• Willows – 6,072
• Durham – 5,834
• Palermo – 5,555
• Williams – 5,408
• Paradise – 4,764
• Wheatland – 3,873
• Wheatland – 3,712
• Arbuckle – 3,484
• South Oroville – 3,235
• Mount Shasta – 3,223
• Kelly Ridge – 3,006
• Sutter – 2,997
• Weed – 2,862
• Alturas – 2,715

Member	Party	Dates	Cong ress(es)	Electoral history	Counties
District created March 4, 1865
Donald C. McRuer (San Francisco)	Republican	March 4, 1865 – March 3, 1867	39th	Elected in 1864. Retired.	1865–1873 Fresno,Inyo,Kern,Los Angeles,Mariposa,Merced,Monterey,San Diego,San Francisco,San Luis Obispo,San Mateo,Santa Barbara,Santa Clara,Santa Cruz,Stanislaus,Tulare
Samuel Beach Axtell (San Francisco)	Democratic	March 4, 1867 – March 3, 1871	40th 41st	Elected in 1867. Re-elected in 1868. Retired.
Sherman Otis Houghton (San Jose)	Republican	March 4, 1871 – March 3, 1873	42nd	Elected in 1871. Redistricted to the4th district.
Charles Clayton (San Francisco)	Republican	March 4, 1873 – March 3, 1875	43rd	Elected in 1872. Retired.	1873–1885 San Francisco
William Adam Piper (San Francisco)	Democratic	March 4, 1875 – March 3, 1877	44th	Elected in 1875. Lost re-election.
Horace Davis (San Francisco)	Republican	March 4, 1877 – March 3, 1881	45th 46th	Elected in 1876. Re-elected in 1879. Lost re-election.
William Rosecrans (San Francisco)	Democratic	March 4, 1881 – March 3, 1885	47th 48th	Elected in 1880. Re-elected in 1882. Retired.
Barclay Henley (Santa Rosa)	Democratic	March 4, 1885 – March 3, 1887	49th	Redistricted from the3rd district andre-elected in 1884. Retired.	1885–1895 Colusa,Del Norte,Humboldt,Lake,Lassen,Mendocino,Modoc,Napa,Plumas,Shasta,Sierra,Siskiyou,Sonoma,Tehama,Trinity
Thomas L. Thompson (Santa Rosa)	Democratic	March 4, 1887 – March 3, 1889	50th	Elected in 1886. Lost re-election.
John J. De Haven (Eureka)	Republican	March 4, 1889 – October 1, 1890	51st	Elected in 1888. Resigned to become associate justice of theCalifornia Supreme Court.
Vacant		October 1, 1890 – December 9, 1890
Thomas J. Geary (Santa Rosa)	Democratic	December 9, 1890 – March 3, 1895	51st 52nd 53rd	Elected to finish De Haven's term. Also elected the same day in 1890 to the next term. Re-elected in 1892. Lost re-election.
John All Barham (Santa Rosa)	Republican	March 4, 1895 – March 3, 1901	54th 55th 56th	Elected in 1894. Re-elected in 1896. Re-elected in 1898. Retired.	1895–1903 Del Norte,Humboldt,Lassen,Marin,Mendocino,Modoc,Napa,Plumas,Shasta,Sierra,Siskiyou,Sonoma,Tehama,Trinity
Frank Coombs (Napa)	Republican	March 4, 1901 – March 3, 1903	57th	Elected in 1900. Lost re-election.
James Gillett (Eureka)	Republican	March 4, 1903 – November 4, 1906	58th 59th	Elected in 1902. Re-elected in 1904. Resigned whenelected Governor.	1903–1913 Alpine,Amador,Calaveras,Del Norte,El Dorado,Humboldt,Lassen,Mariposa,Modoc,Mono,Nevada,Placer,Plumas,Shasta,Sierra,Siskiyou,Tehama,Trinity,Tuolumne
Vacant		November 4, 1906 – November 6, 1906	59th
William F. Englebright (Nevada City)	Republican	November 6, 1906 – March 3, 1911	59th 60th 61st	Elected to finish Gillett's term. Also elected the same day in 1906 to the next term. Re-elected in 1908. Lost re-election.
John E. Raker (Alturas)	Democratic	March 4, 1911 – March 3, 1913	62nd	Elected in 1910. Redistricted to the2nd district.
William Kent (Kentfield)	Independent	March 4, 1913 – March 3, 1917	63rd 64th	Redistricted from the2nd district andre-elected in 1912. Re-elected in 1914. Retired.	1913–1953 Butte,Colusa,Del Norte,Glenn,Humboldt,Lake,Marin,Mendocino,Sonoma,Sutter,Yuba
Clarence F. Lea (Santa Rosa)	Democratic	March 4, 1917 – January 3, 1949	65th 66th 67th 68th 69th 70th 71st 72nd 73rd 74th 75th 76th 77th 78th 79th 80th	Elected in 1916. Re-elected in 1918. Re-elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Re-elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Re-elected in 1944. Re-elected in 1946. Retired.
Hubert B. Scudder (Sebastopol)	Republican	January 3, 1949 – January 3, 1959	81st 82nd 83rd 84th 85th	Elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Retired.
					1953–1963 Del Norte,Humboldt,Lake,Marin,Mendocino,Napa,Sonoma
Clement Woodnutt Miller (Corte Madera)	Democratic	January 3, 1959 – October 7, 1962	86th 87th	Elected in 1958. Re-elected in 1960. Died. Re-elected posthumously in 1962.
Vacant		October 7, 1962 – January 22, 1963	87th 88th
					1963–1967 Del Norte,Humboldt,Marin,Mendocino,Napa,Sonoma
Donald H. Clausen (Crescent City)	Republican	January 22, 1963 – January 3, 1975	88th 89th 90th 91st 92nd 93rd	Elected to finish Miller's term. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Redistricted to the2nd district.
					1967–1973 Del Norte,Humboldt, most ofMarin,Mendocino,Napa,Sonoma
					1973–1983 Butte,Glenn,Lassen,Modoc,Nevada,Placer,Plumas,Shasta,Sierra,Siskiyou,Tehama,Trinity,Yuba
Harold T. Johnson (Roseville)	Democratic	January 3, 1975 – January 3, 1981	94th 95th 96th	Redistricted from the2nd district andre-elected in 1974. Re-elected in 1976. Re-elected in 1978. Lost re-election.
Eugene A. Chappie (Roseville)	Republican	January 3, 1981 – January 3, 1983	97th	Elected in 1980. Redistricted to the2nd district.
Douglas H. Bosco (Occidental)	Democratic	January 3, 1983 – January 3, 1991	98th 99th 100th 101st	Elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Lost re-election.	1983–1993 Del Norte,Humboldt, westernLake,Mendocino, southernNapa, northernSonoma
Frank Riggs (Santa Rosa)	Republican	January 3, 1991 – January 3, 1993	102nd	Elected in 1990. Lost re-election.
Daniel Hamburg (Ukiah)	Democratic	January 3, 1993 – January 3, 1995	103rd	Elected in 1992. Lost re-election.	1993–2003 Del Norte,Humboldt, westernLake,Mendocino,Napa, northwesternSolano, northeasternSonoma
Frank Riggs (Windsor)	Republican	January 3, 1995 – January 3, 1999	104th 105th	Elected in 1994. Re-elected in 1996. Retired torun for U.S. Senator.
Mike Thompson (St. Helena)	Democratic	January 3, 1999 – January 3, 2013	106th 107th 108th 109th 110th 111th 112th	Elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Redistricted to the5th district.
					2003–2013 Del Norte,Humboldt,Lake,Mendocino,Napa, easternSonoma, southernYolo
Doug LaMalfa (Oroville)	Republican	January 3, 2013 – present	113th 114th 115th 116th 117th 118th 119th	Elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024.	2013–2023 Inland Northern California includingButte,Lassen,Modoc,Plumas,Shasta,Sierra,Siskiyou, andTehama counties, plus portions ofGlenn,Nevada, andPlacer counties.[4] Including the main hubs ofChico andRedding, inButte andShasta counties respectively.
					2023–2027

• List of United States congressional districts
• California's congressional districts

• GovTrack.us:California's 1st congressional district
• RAND California Election Returns: District Definitions (out of date)
• California Voter Foundation map - CD01 (out of date)

40°42′N121°24′W / 40.7°N 121.4°W /40.7; -121.4

• Congressional districts of California
• Government of Butte County, California
• Government of Colusa County, California
• Government of Glenn County, California
• Government of Lassen County, California
• Government of Modoc County, California
• Government of Shasta County, California
• Government of Siskiyou County, California
• Government of Sutter County, California
• Government of Tehama County, California
• Government of Yuba County, California
• Sacramento Valley
• Shasta Cascade
• Alturas, California
• Chico, California
• Grass Valley, California
• Mount Shasta
• Mount Shasta, California (city)
• Oroville, California
• Red Bluff, California
• Redding, California
• Yreka, California
• Yuba City, California
• Constituencies established in 1865
• 1865 establishments in California

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• Short description matches Wikidata
• Use mdy dates from April 2021
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