California's 13th congressional district is a congressional district in the U.S. state of California. John Duarte, a Republican, has represented this district since January 2023. In the 2022 redistricting cycle, the district was moved to the San Joaquin Valley, while the old 13th district was renumbered as the 12th. The new 13th district includes all of Merced County; most of the population of Madera County; and parts of Stanislaus, Fresno, and San Joaquin Counties. It includes the cities of Merced, Madera, Ceres, Patterson, Lathrop, Chowchilla, Atwater, Coalinga, and Mendota; as well as the southern parts of both Modesto and Turlock. The new 13th district is considered a Democratic-leaning swing district. Despite that, Duarte was narrowly elected to represent it in 2022. As a result, it was one of 18 districts won by Republicans in 2022 that voted for Joe Biden in the 2020 presidential election. 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.

Election results from statewide races

Composition

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. 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. The 9th district takes in the city of Lathrop. 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. The 5th district takes in 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. 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. The 13th district takes in the cities of Chowchilla and Madera and the census-desiganted places Fairmead, Madera Acres, Parksdale, Parkwood, La Vina, Bonadelle Ranchos, and Madera Ranchos. 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. The 13th district takes in 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.

Cities and CDPs of 10,000 or more people

2,500 – 10,000 people

List of members representing the district

Election results

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