California's 13th congressional district is a congressional district in the U.S. state of California. Adam Gray, a Democrat, has represented this district since January 2025.

The 13th district is located in the San Joaquin Valley, comprising all of Merced County; most of the population of Madera County; and parts of Stanislaus, Fresno, and San Joaquin counties. Cities in the district include Merced, Madera, Ceres, Patterson, Lathrop, Chowchilla, Atwater, Coalinga, and Mendota; as well as the southern parts of both Modesto and Turlock. The 13th is considered a swing district and was one of 13 congressional districts that voted for Donald Trump in the 2024 presidential election while simultaneously electing a Democrat in the 2024 House of Representatives elections.

Prior to the 2022 redistricting, the 13th district contained cities in the northwestern portion of Alameda County including Alameda, Albany, Berkeley, Emeryville, Oakland, Piedmont, and San Leandro. This area is now covered by the 12th district.

Recent election results from statewide races 2023–2027 boundaries Year Office Results2008 PresidentObama 54% - 45%2010 GovernorWhitman 47.0% - 46.5% Lt. GovernorMaldonado 51% - 39% Secretary of StateBowen 46% - 45% Attorney GeneralCooley 50% - 41% TreasurerLockyer 51% - 41% ControllerChiang 52% - 40%2012 PresidentObama 55% - 45%2014 GovernorBrown 51% - 49%2016 PresidentClinton 53% - 41%2018 GovernorNewsom 52% - 48% Attorney GeneralBecerra 55% - 45%2020 PresidentBiden 54% - 43%2022 Senate (Reg.)Meuser 51% - 49% GovernorDahle 54% - 46% Lt. GovernorUnderwood Jacobs 53% - 47% Secretary of StateBernosky 52% - 48% Attorney GeneralHochman 53% - 47% TreasurerGuerrero 53% - 47% ControllerChen 55% - 45%2024 PresidentTrump 51% - 46% Senate (Reg.)Garvey 52% - 48%

Composition County Code County Seat Population19FresnoFresno1,017,16239MaderaMadera162,858 47 Merced Merced 291,92077San JoaquinStockton800,96599StanislausModesto551,430 Due to the 2020 redistricting, California's 13th congressional district has been moved geographically to the San Joaquin Valley. It encompasses Merced County, and parts of San Joaquin, Stanislaus, Madera, and Fresno Counties. The area in San Joaquin County includes the city of Lathrop. The area in Stanislaus County includes the southern halves of the cities of Modesto and Turlock; the cities of Ceres, Patterson, and Newman; and the census-designated places Empire, Airport, Rouse, Bystrom, Parklawn, Bret Harte, Riverdale Park, West Modesto, Keyes, Cowan, Monterey Park Tract, Grayson, Westley, Crows Landing, and Diablo Grande. The area in Madera County includes the cities of Chowchilla and Madera and the census-designated places Fairmead, Madera Acres, Parksdale, Parkwood, La Vina, Bonadelle Ranchos, and Madera Ranchos. The area in Fresno County includes the cities of Coalinga, Mendota, Kerman, Firebaugh, San Joaquin, and Huron; and the census-designated places Biola, Raisin City, Caruthers, Laton, Riverdale, Lanare, Tranquillity, Three Rocks, Cantua Creek, and Westside.

San Joaquin County is split between this district and the 9th district. They are partitioned by Union Pacific, Highway 380, S Tracy Blvd, the California Aqueduct, S Banta Rd, Highway 5, Paradise Cut, S Manthey Rd, Walthall Slough, E West Ripon Rd, Kincaid Rd, Hutchinson Rd, and Stanislaus River.

Stanislaus County is split between this district and the 5th district. They are partitioned by S Golden State Blvd, Highway J14, Union Pacific, Highway 99, N Golden State Blvd, Faith Home Rd, Rohde Rd, Moore Rd, Tuolumne River, Burlington Northern Santa Fe, Lateral No 2 Park, Viola St, Roble Ave, N Conejo Ave, N Carpenter Rd, Kansas Ave, Morse Rd, and Stanislaus River.

Madera County is split between this district and the 5th district. They are partitioned by Road 35, Road 36, Road 38, Madera Equalization Reservoir, River Rd, Avenue 21, Road 23, Avenue 27, Road 22 1/2, and Berenda Slough.

Fresno County is split between this district and the 21st district. They are partitioned by N Dickenson Ave, Highway 180, S Garfield Ave, W California Ave, S Grantland Ave, W Jensen Ave, S Chateau Fresno Ave, W North Ave, W American Ave, S Westlawn Ave, W Lincoln Ave, Shayes Ave, W Sumner Ave, S Cornelia Ave, W South Ave, S East Ave, E Mountain View Ave, S Sunnyside Ave, E Clemenceau Ave, S Fowler Ave, E Elkhorn Ave.

Cities and CDPs of 10,000 or more people Modesto – 218,464 Merced – 86,333 Turlock – 72,740 Madera – 66,224 Ceres – 49,302 Los Banos – 45,532 Atwater – 31,970 Lathrop – 28,701 Patterson – 23,781 Chowchilla – 19,039 Coalinga – 17,590 Kerman – 16,016 Mendota – 15,595 Livingston – 14,172 Newman – 12,351 Winton – 11,709 Delhi – 10,656

2,500 – 10,000 people

Madera Acres – 9,162 Firebaugh – 8,096 Franklin – 6,919 Huron – 6,206 Gustine – 6,110 West Modesto – 5,965 Dos Palos – 5,798 Keyes – 5,672 Bonadelle Ranchos – 5,497 Hilmar-Irwin – 5,164 Bret Harte – 5,135 McSwain – 4,480 Empire – 4,202 Planada – 4,164 Bystrom – 3,957 San Joaquin – 3,701 Madera Ranchos – 3,623 Riverdale – 3,477 Parksdale – 3,234 Caruthers – 2,613

Future composition Beginning with the 2026 election, the 13th district will consist of the following counties:  

Fresno (part) Madera (part) Merced San Joaquin (part) Stanislaus (part)

List of members representing the district Member Party Dates Congress Electoral history Counties District created March 4, 1933 Charles Kramer Democratic March 4, 1933 –January 3, 1943 Elected in 1932.Re-elected in 1934.Re-elected in 1936.Re-elected in 1938.Re-elected in 1940.Lost re-election. 1933–1943 Norris Poulson Republican January 3, 1943 –January 3, 1945 Elected in 1942.Lost re-election. 1943–1953 Ned R. Healy Democratic January 3, 1945 –January 3, 1947 Elected in 1944.Lost re-election. Norris Poulson Republican January 3, 1947 –January 3, 1953 Elected again in 1946.Re-elected in 1948.Re-elected in 1950.Redistricted to the . Ernest K. Bramblett Republican January 3, 1953 –January 3, 1955 Redistricted from the and re-elected in 1952.Retired. 1953–1963Monterey, San Luis Obispo, Santa Barbara, Ventura Charles M. Teague Republican January 3, 1955 –January 1, 1974 Elected in 1954.Re-elected in 1956.Re-elected in 1958.Re-elected in 1960.Re-elected in 1962.Re-elected in 1964.Re-elected in 1966.Re-elected in 1968.Re-elected in 1970.Re-elected in 1972. Died. 1963–1967Santa Barbara, Ventura 1967–1973Southwestern Los Angeles, Santa Barbara, Ventura 1973–1975Most of Santa Barbara and Ventura Vacant January 1, 1974 –March 5, 1974 Robert J. Lagomarsino Republican March 5, 1974 –January 3, 1975 Elected to finish Teague's term.Redistricted to the . Norman Mineta Democratic January 3, 1975 –January 3, 1993 Elected in 1974.Re-elected in 1976.Re-elected in 1978.Re-elected in 1980.Re-elected in 1982.Re-elected in 1984.Re-elected in 1986.Re-elected in 1988.Re-elected in 1990.Redistricted to the . 1975–1983Santa Clara 1983–1993Santa Clara (western San Jose) Pete Stark Democratic January 3, 1993 –January 3, 2013 Redistricted from the and re-elected in 1992.Re-elected in 1994.Re-elected in 1996.Re-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 and lost re-election. 1993–2003Western Alameda, small part of northern Santa Clara 2003–2013Southwestern Alameda Barbara Lee Democratic January 3, 2013 –January 3, 2023 Redistricted from the and re-elected in 2012.Re-elected in 2014.Re-elected in 2016.Re-elected in 2018.Re-elected in 2020.Redistricted to the . 2013–2023Northern Alameda John Duarte Republican January 3, 2023 –January 3, 2025 Elected in 2022.Lost re-election. 2023–presentSan Joaquin Valley, all of Merced County; including all of Madera parts of Stanislaus, Fresno, and San JoaquinAdam Gray DemocraticJanuary 3, 2025 –presentElected in 2024.

Election results 1932 • 1934 • 1936 • 1938 • 1940 • 1942 • 1944 • 1946 • 1948 • 1950 • 1952 • 1954 • 1956 • 1958 • 1960 • 1962 • 1964 • 1966 • 1968 • 1970 • 1972 • 1974 (Special) • 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

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See also List of United States congressional districts California's congressional districts

References

External links GovTrack.us: California's 13th congressional district RAND California Election Returns: District Definitions (out of date) California Voter Foundation map - CD13 (out of date)