California's 3rd congressional district

California's 3rd congressional district is a U.S. congressional district in California. It includes the northern Sierra Nevada and northeastern suburbs of Sacramento, stretching south to Death Valley. It encompasses Alpine, Inyo, Mono, Nevada, Placer (where the majority of the district's population lives), Plumas, and Sierra counties, as well as parts of El Dorado, Sacramento, and Yuba counties. It includes the Sacramento suburbs of Roseville (the district's largest city), Folsom, Orangevale, Rocklin, Auburn, and Lincoln, along with the mountain towns of Quincy, South Lake Tahoe, Truckee, Mammoth Lakes, and Bishop. The district is represented in the House of Representatives by the only independent in the House, Kevin Kiley, although he caucuses with the Republican Party.

Prior to redistricting in 2020, the 3rd district encompassed most of the Sacramento Valley north and west of Sacramento. It covered all of Colusa, Sutter and Yuba counties, most of Glenn, Lake, Solano and Yolo counties and a portion of Sacramento County. The district was represented by John Garamendi, a Democrat.