California's 1st congressional district

California's 1st congressional district is a U.S. congressional district in California. The district is currently represented by James Gallagher, who has represented the district following the June 2026 special election held to fill the vacancy created by the death of representative Doug LaMalfa. Currently, the district encompasses many northeastern parts of the state. Since the 2022 election, it includes the counties of Butte, Colusa, Glenn, Lassen, Modoc, Shasta, Siskiyou, Sutter, and Tehama, and most of Yuba County. The largest cities in the district are Chico, Redding, and Yuba City.

Prior to redistricting in 2021, it included the counties of Butte, Lassen, Modoc, Plumas, Shasta, Sierra, Siskiyou, and Tehama, most of Nevada County, part of Glenn County, and part of Placer County. In the 2021 redistricting, it added the Yuba–Sutter area and removed most of its share of the Sierra Nevada.

Competitiveness Prior to 2013, the GOP last held the seat in 1998 when U.S. Representative Frank Riggs decided to run for the U.S. Senate. Riggs was replaced by long-time Democratic Assemblyman and State Senator Mike Thompson. Redistricting in 2001 added Democratic-leaning areas of Yolo County.

John Kerry, a Democrat, won the district in 2004 presidential election with 59.7% of the vote. Barack Obama carried the district in 2008 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, 2020, and 2024 respectively.

Recent election results from statewide races Year Office Results2008 PresidentMcCain 57% – 43%2010 GovernorWhitman 55% – 37% Lt. GovernorMaldonado 54% – 32% Secretary of StateDunn 53% – 37% Attorney GeneralCooley 58% – 30% TreasurerWalters 51% – 40% ControllerStrickland 47% – 41%2012 PresidentRomney 59% – 41%2014 GovernorKashkari 58% – 42%2016 PresidentTrump 57% – 36%2018 GovernorCox 63% – 37% Attorney GeneralBailey 61% – 39%2020 PresidentTrump 58% – 39%2022 Senate (Reg.)Meuser 64% – 36% GovernorDahle 67% – 33% Lt. GovernorUnderwood Jacobs 65% – 35% Secretary of StateBernosky 64% – 36% Attorney GeneralHochman 65% – 35% TreasurerGuerrero 65% – 35% ControllerChen 66% – 34%2024 PresidentTrump 61% – 36% Senate (Reg.)Garvey 64% – 36%

Composition County Code County Seat Population 007 Butte Oroville 207,172 011 Colusa Colusa 22,037 021 Glenn Willows 28,129 035 Lassen Susanville 28,861 049 Modoc Alturas 8,500 089 Shasta Redding 180,366 093 Siskiyou Yreka 42,905 101 Sutter Yuba City 97,948 103 Tehama Red Bluff 64,896115YubaMarysville85,722 Under the 2020 redistricting, California's 1st district is located in northeastern California, encompassing Butte, Colusa, Glenn, Lassen, Modoc, Shasta, Siskiyou, Sutter, and Tehama Counties, as well as part Yuba County. The area in Yuba County includes the cities of Marysville and Wheatland; and the census-designated places of Beale AFB, Linda, Olivehurst, and Plumas Lake.

Yuba County is split between this district and the 3rd district. They are partitioned by State Highway 70, Ellis Rd, and Union Pacific.

Cities and CDPs with 10,000 or more people 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

2,500 – 10,000 people 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

Future composition Beginning with the 2026 election, the 1st district will consist of the following counties:

Butte Glenn Lake Lassen Mendocino (part) Plumas Sierra Sonoma (part) Tehama

List of members representing the district Member Party Dates Congress(es) Electoral history Counties District created March 4, 1865 Donald C. McRuer Republican March 4, 1865 –March 3, 1867 Elected in 1864.Retired. 1865–1873Fresno, 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 Democratic March 4, 1867 –March 3, 1871 Elected in 1867.Re-elected in 1868.Retired. Sherman Otis Houghton Republican March 4, 1871 –March 3, 1873 Elected in 1871.Redistricted to the . Charles Clayton Republican March 4, 1873 –March 3, 1875 Elected in 1872.Retired. 1873–1885San Francisco William Adam Piper Democratic March 4, 1875 –March 3, 1877 Elected in 1875.Lost re-election. Horace Davis Republican March 4, 1877 –March 3, 1881 Elected in 1876.Re-elected in 1879.Lost re-election. William Rosecrans Democratic March 4, 1881 –March 3, 1885 Elected in 1880.Re-elected in 1882.Retired. Barclay Henley Democratic March 4, 1885 –March 3, 1887 Redistricted from the and re-elected in 1884.Retired. 1885–1895Colusa, Del Norte, Humboldt, Lake, Lassen, Mendocino, Modoc, Napa, Plumas, Shasta, Sierra, Siskiyou, Sonoma, Tehama, Trinity Thomas L. Thompson Democratic March 4, 1887 –March 3, 1889 Elected in 1886.Lost re-election. John J. De Haven Republican March 4, 1889 –October 1, 1890 Elected in 1888.Resigned to become associate justice of the California Supreme Court. Vacant October 1, 1890 –December 9, 1890 Thomas J. Geary Democratic December 9, 1890 –March 3, 1895 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 Republican March 4, 1895 –March 3, 1901 Elected in 1894.Re-elected in 1896.Re-elected in 1898.Retired. 1895–1903Del Norte, Humboldt, Lassen, Marin, Mendocino, Modoc, Napa, Plumas, Shasta, Sierra, Siskiyou, Sonoma, Tehama, Trinity Frank Coombs Republican March 4, 1901 –March 3, 1903 Elected in 1900.Lost re-election. James Gillett Republican March 4, 1903 –November 4, 1906 Elected in 1902.Re-elected in 1904.Resigned when elected Governor. 1903–1913Alpine, 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 William F. Englebright Republican November 6, 1906 –March 3, 1911 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 Democratic March 4, 1911 –March 3, 1913 Elected in 1910.Redistricted to the . William Kent Independent March 4, 1913 –March 3, 1917 Redistricted from the and re-elected in 1912.Re-elected in 1914.Retired. 1913–1953Butte, Colusa, Del Norte, Glenn, Humboldt, Lake, Marin, Mendocino, Sonoma, Sutter, Yuba Clarence F. Lea Democratic March 4, 1917 –January 3, 1949 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 Republican January 3, 1949 –January 3, 1959 Elected in 1948.Re-elected in 1950.Re-elected in 1952.Re-elected in 1954.Re-elected in 1956.Retired. 1953–1963Del Norte, Humboldt, Lake, Marin, Mendocino, Napa, Sonoma Clement Woodnutt Miller Democratic January 3, 1959 –October 7, 1962 Elected in 1958.Re-elected in 1960.Died.Re-elected posthumously in 1962. Vacant October 7, 1962 –January 22, 1963 1963–1967Del Norte, Humboldt, Marin, Mendocino, Napa, Sonoma Donald H. Clausen Republican January 22, 1963 –January 3, 1975 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 the . 1967–1973Del Norte, Humboldt, most of Marin, Mendocino, Napa, Sonoma 1973–1983Butte, Glenn, Lassen, Modoc, Nevada, Placer, Plumas, Shasta, Sierra, Siskiyou, Tehama, Trinity, Yuba Harold T. Johnson Democratic January 3, 1975 –January 3, 1981 Redistricted from the and re-elected in 1974.Re-elected in 1976.Re-elected in 1978.Lost re-election. Eugene A. Chappie Republican January 3, 1981 –January 3, 1983 Elected in 1980.Redistricted to the . Douglas Bosco Democratic January 3, 1983 –January 3, 1991 Elected in 1982.Re-elected in 1984.Re-elected in 1986.Re-elected in 1988.Lost re-election. 1983–1993Del Norte, Humboldt, western Lake, Mendocino, southern Napa, northern Sonoma Frank Riggs Republican January 3, 1991 –January 3, 1993 Elected in 1990.Lost re-election. Daniel Hamburg Democratic January 3, 1993 –January 3, 1995 Elected in 1992.Lost re-election. 1993–2003Del Norte, Humboldt, western Lake, Mendocino, Napa, northwestern Solano, northeastern Sonoma Frank Riggs Republican January 3, 1995 –January 3, 1999 Elected in 1994.Re-elected in 1996.Retired to run for U.S. Senator. Mike Thompson Democratic January 3, 1999 –January 3, 2013 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 the . 2003–2013Del Norte, Humboldt, Lake, Mendocino, Napa, eastern Sonoma, southern Yolo Doug LaMalfa Republican January 3, 2013 –January 6, 2026 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.Died. 2013–2023Inland Northern California including Butte, Lassen, Modoc, Plumas, Shasta, Sierra, Siskiyou, and Tehama counties, plus portions of Glenn, Nevada, and Placer counties. Including the main hubs of Chico and Redding, in Butte and Shasta counties respectively. 2023–2027 Vacant January 6, 2026 –June 10, 2026 James Gallagher Republican June 10, 2026 –present Elected to finish LaMalfa’s term.

Election results 1864 • 1866 • 1868 • 1870 • 1872 • 1874 • 1876 • 1878 • 1880 • 1882 • 1884 • 1886 • 1888 • 1890 (Special) • 1892 • 1894 • 1896 • 1898 • 1900 • 1902 • 1904 • 1906 (Special) • 1908 • 1910 • 1912 • 1914 • 1916 • 1918 • 1920 • 1922 • 1924 • 1926 • 1928 • 1930 • 1932 • 1934 • 1936 • 1938 • 1940 • 1942 • 1944 • 1946 • 1948 • 1950 • 1952 • 1954 • 1956 • 1958 • 1960 • 1962 • 1963 (Special) • 1964 • 1966 • 1968 • 1970 • 1972 • 1974 • 1976 • 1978 • 1980 • 1982 • 1984 • 1986 • 1988 • 1990 • 1992 • 1994 • 1996 • 1998 • 2000 • 2002 • 2004 • 2006 • 2008 • 2012 • 2014 • 2016 • 2018 • 2020 • 2022 • 2024 • 2026 (Special)

1864

1866

1868

1870

1872

1874

1876

1879

1880

1882

1884

1886

1888

1890 Special & General

1892

1894

1896

1898

1900

1902

1904

1906 (Special)

1906 (General)

1908

1910

1912

1914

1916

1918

1920

1922

1924

1926

1928

1930

1932

1934

1936

1938

1940

1942

1944

1946

1948

1950

1952

1954

1956

1958

1960

1962

1963 (Special)

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

2012

2014

2016

2018

2020

2022

2024

2026 (Special)

California's 1st congressional district

Bron en licentie