U.S. House district for California
California's 10th congressional district Interactive map of district boundaries since 2023 (Used in the
2022 elections )
Representative Population (2023) 746,449 Median household $150,078[ 1] Ethnicity Cook PVI D+18[ 2]
California's 10th congressional district is a congressional district in the U.S. state of California . Currently, the 10th district encompasses parts of the eastern San Francisco Bay Area . It is currently represented by Democrat Mark DeSaulnier .
The district previously included all of Stanislaus County and part of San Joaquin County . It was centered on Modesto . Cities in the district included Oakdale , Manteca , Modesto, Tracy , and Turlock .[ 3]
Redistricting before the 2022 elections moved the district to the San Francisco Bay Area . It includes the cities of Concord , Walnut Creek , Danville , San Ramon , Brentwood , and southern Antioch in Contra Costa County , and eastern Dublin in Alameda County . It was essentially the successor of the old 11th district .[ 4]
Prior to redistricting by the California Citizens Redistricting Commission going into effect in 2012, the 10th district stretched from Livermore to Dixon and the outskirts of Vacaville . It consisted of portions of Alameda , Contra Costa , Sacramento , and Solano Counties.
District borders, 2002-2012. Following redistricting in 1992, the 10th district was based in the East Bay , and included parts of Alameda and Contra Costa counties. It received national attention in 1996 when Democrat Ellen Tauscher defeated incumbent Republican Bill Baker in what was considered an upset.[ 5]
In the 2002 redistricting of California, all seats were made safe[ 6] Solano County , southwestern Sacramento County , eastern Contra Costa County and El Cerrito in western Contra Costa County. Although much of the suburban Tri-Valley region was shifted to the 11th congressional district , the city of Livermore remained in the 10th at Tauscher's request (as a member of the U.S. House Committee on Energy and Commerce , she had some oversight responsibilities over the U.S. Department of Energy , and hence indirectly of Lawrence Livermore National Laboratory ).
On June 26, 2009, Tauscher resigned her seat to be sworn in as Undersecretary of State for Arms Control and International Security .[ 7] [ 8] [ 9] special election held on November 3, 2009, former Democratic Lieutenant Governor John Garamendi won the seat over Republican David Harmer 53.0% to 42.7%. Immediately following redistricting, Garamendi successfully ran for re-election in California's 3rd congressional district , which shares many municipalities with the 2002 version of the 10th district (e.g. Vacaville and Fairfield ), but lies significantly northwest of the current 10th district.
The 10th congressional district starting with the election of 2012 and lasting through the election of 2020 included all of Stanislaus County (including Ceres , Oakdale , Modesto , Riverbank , and Turlock ) and the southern portion of San Joaquin County (including Tracy and Manteca ).[ 3]
This went into effect in 2012, as the result of redistricting by the California Citizens Redistricting Commission . This version of the 10th included much of the core of the old 18th district (Modesto , Ceres , and the southwestern half of Stanislaus County), though the 18th also included a substantial portion of Stockton . It also shares much of the northwestern portion of the old 19th district (Turlock , Riverbank , Oakdale , and the rest of northeastern Stanislaus County).
Republican Jeff Denham transferred from the prior 19th district to the newer 10th. He held it for three terms until being defeated in 2018 by Democrat Josh Harder , who won reelection in 2020 .
The 10th district was redrawn in time for the 2022 election , being divided up between California's 5th congressional district (which now includes eastern portions of Modesto and eastern portions of Turlock ), California's 9th congressional district (which is centered on Stockton, California and includes Tracy ), and California's 13th congressional district (which includes western Modesto and western Turlock ) .[ 10] Josh Harder was reelected and moved to the new version of California's 9th congressional district . The district has been represented since Jan 3, 2023 by Mark DeSaulnier .
Voter Registration Statistics [ edit ] The California Secretary of State publishes reports on California voter registration on a regular basis. Before the 2018 primary election, they published a report dating May 21, 2018.
Date
Democratic
Republican
American Independent
Green
Libertarian
No Party Preference
May 21, 2018[ 11]
127,878
117,900
10,011
959
2,484
70,251
Election results from statewide races [ edit ] As of the 2020 redistricting, California's 10th congressional district encompasses most of Contra Costa County, and part of Alameda County.
Contra Costa County is split between this district, the 8th district , and the 9th district . The northern border is 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 western border is 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 10th district takes in the south sides of the cities of Antioch and Martinez , the cities of Concord , Brentwood , Oakley , Pleasant Hill , Clayton , Walnut Creek , Lafayette , Orinda , and San Ramon , the towns of Danville and Moraga , and the census-designated places Norris Canyon , Camino Tassajara , Blackhawk , Diablo , Alamo , Castle Hill , Saranap , Acalanes Ridge , San Miguel , North Gate , Shell Ridge , Contra Costa Centre , Reliez Valley , Alhambra Valley , Mountain View , Vine Hill , Pacheco , Clyde , Knightsen , and Bethel Island .
Alameda County is split between this district and the 12th , 14th , and 17th districts. They are partitioned by Sinclair Freeway, Amador Valley Blvd, Emerald Ave, Tamarack Dr, Brighton Dr, Ione Way, Newcastle Ln, Dougherty Rd, Highway 580, Lembert Hills Dr. The 10th district takes in the eastern portion of the city of Dublin .
[ edit ] Concord – 125,410Antioch – 115,291San Ramon – 84,605Dublin – 72,589Walnut Creek – 70,127Brentwood – 64,292Danville – 43,582Oakley – 43,357Martinez – 37,287Pleasant Hill – 34,613Lafayette – 25,391Orinda – 19,514Moraga – 16,870Alamo – 15,314Clayton – 11,070[ edit ] List of members representing the district [ edit ]
Member
Party
Dates
Cong
Electoral history
Counties
District created March 4, 1913
William Stephens (Los Angeles )
Progressive
March 4, 1913 –
63rd 64th
Redistricted from the 7th district re-elected in 1912 .Re-elected in 1914 .Lieutenant Governor of California .
1913–1933 Los Angeles (Los Angeles )
Vacant
July 22, 1916 –
64th
Henry S. Benedict (Los Angeles )
Republican
November 7, 1916 –
Elected to finish Stephens's term .Progressive but withdrew.
Henry Z. Osborne (Los Angeles )
Republican
March 4, 1917 –
65th 66th 67th
Elected in 1916 .Re-elected in 1918 .Re-elected in 1920 .Re-elected in 1922 but died.
Vacant
February 8, 1923 –
67th 68th
John D. Fredericks (Los Angeles )
Republican
May 1, 1923 –
68th 69th
Elected to finish Osborne's term .Re-elected in 1924 .
Joe Crail (Los Angeles )
Republican
March 4, 1927 –
70th 71st 72nd
Elected in 1926 .Re-elected in 1928 .Re-elected in 1930 .
Henry E. Stubbs (Santa Maria )
Democratic
March 4, 1933 –
73rd 74th 75th
Elected in 1932 .Re-elected in 1934 .Re-elected in 1936 .1933–1943 Kern , San Luis Obispo , Santa Barbara , Tulare , Ventura
Vacant
February 28, 1937 –
75th
Alfred J. Elliott (Tulare )
Democratic
May 4, 1937 –
75th 76th 77th 78th 79th 80th
Elected to finish Stubbs's term .Re-elected in 1938 .Re-elected in 1940 .Re-elected in 1942 .Re-elected in 1944 .Re-elected in 1946 .
1943–1953 Kern , Kings , Tulare
Thomas H. Werdel (Bakersfield )
Republican
January 3, 1949 –
81st 82nd
Elected in 1948 .Re-elected in 1950 .14th district
Charles Gubser (Gilroy )
Republican
January 3, 1953 –
83rd 84th 85th 86th 87th 88th 89th 90th 91st 92nd 93rd
Elected in 1952 .Re-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 .1953–1963 San Benito , Santa Clara , Santa Cruz
1963–1967 San Benito , western Santa Clara
1967–1973 Santa Clara
1973–1975 Santa Clara
Vacant
December 31, 1974 –
93rd
Don Edwards (San Jose )
Democratic
January 3, 1975 –
94th 95th 96th 97th 98th 99th 100th 101st 102nd
Redistricted from the 9th district re-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 .16th district
1975–1983 Alameda , northern Santa Clara
1983–1993 Alameda , Santa Clara (eastern San Jose )
Bill Baker (Walnut Creek )
Republican
January 3, 1993 –
103rd 104th
Elected in 1992 .Re-elected in 1994 .1993–2003 Alameda , eastern Contra Costa
Ellen Tauscher (Alamo )
Democratic
January 3, 1997 –
105th 106th 107th 108th 109th 110th 111th
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 .Undersecretary of State for Arms Control and International Security .
2003–2013 Alameda , most of Contra Costa , southwest Sacramento , most of Solano
Vacant
June 26, 2009 –
111th
John Garamendi (Walnut Creek )
Democratic
November 3, 2009 –
111th 112th
Elected to finish Tauscher's term .Re-elected in 2010 .3rd district
Jeff Denham (Turlock )
Republican
January 3, 2013 –
113th 114th 115th
Redistricted from the 19th district re-elected in 2012 .Re-elected in 2014 .Re-elected in 2016 .
2013–2023 Central Valley including Modesto and Tracy
Josh Harder (Turlock )
Democratic
January 3, 2019 –
116th 117th
Elected in 2018 .Re-elected in 2020 .9th district
Mark DeSaulnier (Concord )
Democratic
January 3, 2023 –
118th
Redistricted from the 11th district re-elected in 2022 .Re-elected in 2024 .
2023–present San Francisco Bay Area , including parts of Stanislaus and San Joaquin
Election results for representatives [ edit ] Republican John D. Fredericks won the special election to replace fellow Republican Henry Z. Osborne , who died in office.[ 38]
Democrat Alfred J. Elliott won the special election to replace fellow Democrat Henry E. Stubbs , who died in office.[ 47]
2018 United States House of Representatives elections
Primary election
Party
Candidate
Votes
%
Republican
Jeff Denham (Incumbent)
45,719
37.5
Democratic
Josh Harder
20,742
17.0
Republican
Ted D. Howze
17,723
14.6
Democratic
Michael Eggman
12,446
10.2
Democratic
Virginia Madueño
11,178
9.2
Democratic
Sue Zwahlen
9,945
8.2
Democratic
Michael J. "Mike" Barkley
2,904
2.4
Democratic
Dotty Nygard (withdrawn)
1,100
0.9
Total votes
121,757
100.0
General election
Democratic Josh Harder 115,945
52.3
Republican
Jeff Denham (Incumbent)
105,955
47.7
Total votes
221,900
100.0
Democratic gain from Republican
^ Center for New Media & Promotion (CNMP), US Census Bureau. "My Congressional District" . www.census.gov . ^ "2022 Cook PVI: District Map and List" . Cook Political Report . Retrieved January 10, 2023 .^ a b "Maps: Final Congressional Districts" . Citizens Redistricting Commission. Archived from the original on March 10, 2013. Retrieved February 24, 2013 .^ "CA 2022 Congressional" . Dave's Redistricting . January 4, 2022. Retrieved November 11, 2022 .^ "Ellen Tauscher is the Grand Dame of CD-10" . May 18, 2015. Archived from the original on May 18, 2015.^ See Politics of California#Bi-partisan gerrymandering
^ "Tauscher accepts State Department post" . March 18, 2009.^ "Capitol Alert: Tauscher to take Obama post, opening up House seat" . Archived from the original on April 10, 2009. Retrieved June 14, 2009 .^ Stannard, Matthew (June 25, 2009). "Rep. Tauscher new U.S. arms control chief" . San Francisco Chronicle . Retrieved June 25, 2009 . ^ "Map Viewer" . We Draw the Lines CA . Retrieved January 22, 2022 .^ California Secretary of State. Registration by US Congressional District, Report of Registration-May 21, 2018. https://www.sos.ca.gov/elections/report-registration/15day-primary-2018/
^ Supplement to the Statement of Vote ca.gov^ Supplement to the Statement of Vote ca.gov^ Supplement to the Statement of Vote ca.gov^ "Supplement to the Statement of Vote - November 3, 1998 General Election Counties by Congressional Districts" (PDF) . September 29, 2011. Archived from the original (PDF) on September 29, 2011.^ "Supplement to the Statement of Vote - November 3, 1998 Election Counties by Congressional Districts" (PDF) . September 29, 2011. Archived from the original (PDF) on September 29, 2011.^ "Statement of Vote (2000 President)" (PDF) . Archived from the original (PDF) on June 11, 2007.^ "Statement of Vote (2000 Senator)" (PDF) . Archived from the original (PDF) on June 11, 2007.^ "Statement of Vote (2002 Governor)" (PDF) . Archived from the original (PDF) on November 11, 2010.^ "Statement of Vote (2003 Recall Question)" (PDF) . Archived from the original (PDF) on May 20, 2011.^ "Statement of Vote (2003 Governor)" (PDF) . Archived from the original (PDF) on May 20, 2011.^ "Statement of Vote (2004 President)" (PDF) . Archived from the original (PDF) on August 1, 2010.^ "Statement of Vote (2004 Senator)" (PDF) . Archived from the original (PDF) on August 10, 2011.^ "Statement of Vote (2006 Governor)" (PDF) . Archived from the original (PDF) on August 10, 2011.^ "Statement of Vote (2006 Senator)" (PDF) . Archived from the original (PDF) on August 10, 2011.^ "(2008 President)" . Archived from the original on February 11, 2009.^ Supplement to the Statement of Vote - Counties by Congressional Districts for United States Senator ^ Supplement to the Statement of Vote - Counties by Congressional Districts for Governor ^ Supplement to the Statement of Vote - Counties by Congressional Districts for United States Senator ^ J. Miles Coleman. "California's 2018 statewide races by congressional district" . twitter.com . Retrieved January 6, 2018 . ^ Supplement to the Statement of Vote - Counties by Congressional Districts for United States Senator ^ "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 .^ "CA District 10 - Special Election" . Our Campaigns . Retrieved January 23, 2022 .^ "1920 election results" (PDF) .^ "1922 election results" (PDF) .^ "JoinCalifornia - 05-01-1923 Election" . www.joincalifornia.com .^ "CA District 10 - Special Election" . Our Campaigns . Retrieved January 23, 2022 .^ "1924 election results" (PDF) .^ "1926 election results" (PDF) .^ "1928 election results" (PDF) .^ "1930 election results" (PDF) .^ "1932 election results" (PDF) .^ "1934 election results" (PDF) .^ "1936 election results" (PDF) .^ "JoinCalifornia - 05-04-1937 Election" . www.joincalifornia.com .^ "CA District 10 - Special Election" . Our Campaigns . Retrieved January 23, 2022 .^ "1938 election results" (PDF) .^ "1940 election results" (PDF) .^ "1942 election results" (PDF) .^ "1944 election results" (PDF) .^ "1946 election results" (PDF) .^ "1948 election results" (PDF) .^ "1950 election results" (PDF) .^ "1952 election results" (PDF) .^ "1954 election results" (PDF) .^ "1956 election results" (PDF) .^ "1958 election results" (PDF) .^ "1960 election results" (PDF) .^ "1962 election results" (PDF) .^ "1964 election results" (PDF) .^ "1966 election results" (PDF) .^ "1968 election results" (PDF) .^ "1970 election results" (PDF) .^ "1972 election results" (PDF) .^ "1974 election results" (PDF) .^ "1976 election results" (PDF) .^ "1978 election results" (PDF) .^ "1980 election results" (PDF) .^ "1982 election results" (PDF) .^ "1984 election results" (PDF) .^ "1986 election results" (PDF) .^ "1988 election results" (PDF) .^ "1990 election results" (PDF) .^ "1992 election results" (PDF) .^ "1994 election results" (PDF) .^ "1996 election results" (PDF) .^ "1998 election results" (PDF) .^ "2000 election results" (PDF) .^ "2002 general election results" (PDF) . Archived from the original (PDF) on February 3, 2009.^ "2004 general election results" (PDF) .[permanent dead link ] ^ "2006 general election results" (PDF) . Archived from the original (PDF) on November 27, 2008.^ "2008 general election results" (PDF) . Archived from the original (PDF) on December 21, 2008.^ "Official Canvass: United States Representative 10th Congressional District Special General Election, November 3, 2009" (PDF) . Secretary of State of California . November 16, 2009. Archived from the original (PDF) on November 19, 2009. Retrieved November 16, 2009 .^ "2010 general election results" (PDF) . Archived from the original (PDF) on May 20, 2011.^ a b "2012 general election results" (PDF) . Archived from the original (PDF) on October 19, 2013.^ "Election 2020 | California Secretary of State" . www.sos.ca.gov .
The at-large seats only existed from 1850 to 1865 and from 1883 to 1885. See also
California's past and present representatives , senators , and delegations
37°36′N 121°00′W / 37.6°N 121.0°W / 37.6; -121.0
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53.3 - 46.7%
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