California's 8th congressional district is a congressional district in the U.S. state of California. As of 2023, Democrat John Garamendi represents the district. Currently, the 8th district includes parts of the Bay Area counties of Contra Costa County and Solano County, including the cities of Vallejo, Fairfield, Richmond and parts of Martinez. Competitiveness Before the 2011 redistricting, the 8th district was a Democratic stronghold. It gave John Kerry his best performance in California in 2004, backing the Democrat with 84.2% of the vote. Barack Obama continued on this trend in 2008 when he received 85.22% of the vote in the district while John McCain received 12.38%. The 8th district from 2013-2023 was located in a politically conservative region of the state with a "Strongly Republican" Cook Partisan Voting Index of R+10. The Cook Political Report ranked it the 87th most Republican-leaning congressional district in the United States. In the 2012 election, the first after the state's adoption of top-two primaries, the 8th district was one of only two in California where two Republicans faced each other in a runoff election. In 2018, it was the only such California district. Election results from statewide races Composition As of 2023, California's 8th congressional district was significantly changed, now being located between the Sacramento and San Joaquin Valleys. It encompasses part of Contra Costa and Solano Counties. Contra Costa County is split between this district and the 10th district. They are partitioned by Grizzly Peak Blvd, Seaview Trail, Camino Pablo, Bear Creek Rd, San Pablo Creek, Bear Creek, Brianes Reservoir, Burlington Northern Santa Fe, Highway 4, Alhambra Ave, Pacheco Blvd, Grandview Ave, Central Ave, Imhoff Dr, Bares Ave, Mount Diablo Creek, Union Pacific, Contra Costa Canal, 4WD Rd, Bailey Rd, James Donlon Blvd, Cambridge Dr, Reseda Way, S Royal links Cir, Carpinteria Dr, Barmouth Dr, Hillcrest Ave, Highway 4, and Highway 160. The 8th district takes in the north side of the cities of Antioch and Martinez, the cities of Pittsburg, Richmond, San Pablo, El Cerrito, Pinole, and Hercules. Solano County is split between this district and the 4th district. They are partitioned by Soda Springs Rd, Union Pacific, Alamo Dr, Leisure Town Rd, Hawkins Rd, Bay Area Exxextric, Shilo Rd, Collinsville Rd, and Montezuma Slough. The 8th district takes in the cities of Vallejo, Fairfield, and Suisun City. Cities & CDP with 10,000 or more people Vallejo - 126,090 Fairfield - 119,881