John Kerry won the penultimate version of the district in 2004 with 85.9% of the vote. Barack Obama swept the same district in 2008 with 88.13% of the vote while John McCain received 9.87% of the vote, making it Obama's best and McCain's worst performance in California. The latter version of the 9th district (starting in 2012) was substantially more competitive, though it also favored the Democratic Party. According to poll-aggregation website FiveThirtyEight, the 2022 version of the district leans toward the Democratic Party.[6]
As of the 2022 redistricting, California's 9th congressional district is located between the Sacramento Valley, Gold Country, and the San Joaquin Valley. It encompasses most of San Joaquin County, and parts of Contra Costa and Stanislaus Counties.
San Joaquin County is split between this district and the 13th 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 cities of Stockton, Tracy, Manteca, and Lodi.
Contra Costa County is split between this district and the 10th district. They are partitioned by Old River, Italian Slough, Western Farms Ranch Rd, Rankin Rd, Highway J14, Byron Hot Springs Rd, Camino Diablo, Kellogg Creek, Sellers Ave, Brentwood Blvd, Alloro Dr, Ghiggeri Dr, Emilio Dr, Guthrie Ln, Balfour Rd, Chestnut St, Byron Highway, Orwood Rd, Burlington Northern Santa Fe, Werner Dredger Cut, and Rock Slough. The 9th district takes in the census-designated place Discovery Bay.
Stanislaus County is split between this district and the 13th district. Lon Dale Rd, Highway J9, Highway J14, River Rock Rd, Lesnini Creek, Sonora Rd, and Stanislaus River. The 9th district takes in the Woodward Reservoir, and the only census-designated place within it is Valley Home.
^"My Congressional District: Congressional District 9 (118th Congress), California". United States Census Bureau.
^"2022 Cook PVI: District Map and List". Cook Political Report. Retrieved January 10, 2023.
^"Maps: Final Congressional Districts". Citizens Redistricting Commission. Archived from the original on March 10, 2013. Retrieved February 24, 2013.
^"Map Viewer". We Draw the Lines CA. Retrieved January 22, 2022.
^"Congressional pdf Final.pdf". wedrawthelinesca.org. Retrieved February 21, 2022. - PDF retrieved via "Final Maps". We Draw the Lines CA. Retrieved February 21, 2022.
^Rakich, Ryan Best, Aaron Bycoffe and Nathaniel (August 9, 2021). "What Redistricting Looks Like In Every State - California - Commission-approved draft plan". FiveThirtyEight. Retrieved January 22, 2022.{{cite web}}: CS1 maint: multiple names: authors list (link)
^Statement of Vote (2000 President) Archived 2007-06-11 at the Wayback Machine
^Statement of Vote (2000 Senator) Archived 2007-06-11 at the Wayback Machine
^Statement of Vote (2002 Governor) Archived 2010-11-11 at the Wayback Machine
^Statement of Vote (2003 Recall Question) Archived 2011-05-20 at the Wayback Machine
^Statement of Vote (2003 Governor) Archived 2011-05-20 at the Wayback Machine
^Statement of Vote (2004 President) Archived 2010-08-01 at the Wayback Machine
^Statement of Vote (2004 Senator) Archived 2011-08-10 at the Wayback Machine
^Statement of Vote (2006 Governor) Archived 2011-08-10 at the Wayback Machine
^Statement of Vote (2006 Senator) Archived 2011-08-10 at the Wayback Machine
^Supplement to the Statement of Vote - Counties by Congressional Districts for Governor
^"Supplement to the Statement of Vote September 14, 2021, California Gubernatorial Recall Election Counties by Congressional Districts for Recall Question" (PDF). Archived (PDF) from the original on March 7, 2022.
^"Counties by Congressional Districts for Recall Election Gubernatorial Replacement Candidates" (PDF).
^"Counties by Congressional Districts for Governor" (PDF). sos.ca.gov. November 8, 2022. Retrieved May 4, 2023.