California District 10
Tue, Nov 3 · Sitting member, elected on the old lines Mark DeSaulnier Democratic since Jan 2015
Mark DeSaulnierDemocratic · IncumbentAge 74 · 11 years in CongressJeff FreseRepublican
No published poll names both candidates.District lines changed for 2026. Results from the old lines aren't shown.
- Lines for 2026
- Redrawn. 17.1% of residents were in a different district in 2024
- On the 2026 ballot
- 2 candidates
Side by side
Left column: DeSaulnierRight column: Frese
- Total receipts, 2025-2026 cycle, through Oct 14
- $722K
- No FEC report
- Cash on hand
- $467K
- No FEC report
- Donor-based spectrum
- LiberalCentristConservativeDeSaulnierNo published score for Frese
- Races
- Won 6 of 6
- None listed
- Years since first win
- 11
- Not available
- Age on Election Day
- 74
- Not available
Money: FEC bulk data, through Oct 14. One or more are matched to the FEC by name, party and seat, so a total could belong to someone else.
How these are counted
Total receipts line of each candidate’s principal campaign committee, 2025-2026 cycle. Other sites may show career, six-year or all-committee totals, which differ. DeSaulnier: $721,776 received, $467,220 cash on hand. The spectrum is a published research score, not our rating. How this works. Wins and losses count the races in our results files, the same as each profile.
More about this race
Candidates on the ballot
- Mark DeSaulnierIncumbentDemocraticUnited States Congressman
- Jeff FreseRepublicanSmall Business Owner
Source: elections.cdn.sos.ca.gov (PDF), dated Aug 27
All California districts
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2024 US House margin
- D 15+ pts
- D 5 to 15 pts
- D under 5 pts
- R under 5 pts
- R 5 to 15 pts
- R 15+ pts
- Other winner
- No data
Show these districts as a list (52)
- California District 1· New lines for 2026, old result not shown
- California District 2· New lines for 2026, old result not shown
- California District 3· New lines for 2026, old result not shown
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- California District 11· Nancy Pelosi (D), Democratic by 62.0 points, 2024
- California District 12· Lateefah Simon (D), Democratic by 30.8 points, 2024
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- California District 15· Kevin Mullin (D), Democratic by 46.2 points, 2024
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- California District 19· Jimmy Panetta (D), Democratic by 38.6 points, 2024
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- California District 34· Jimmy Gomez (D), Democratic by 11.2 points, 2024
- California District 35· New lines for 2026, old result not shown
- California District 36· Ted Lieu (D), Democratic by 37.4 points, 2024
- California District 37· Sydney Kamlager-Dove (D), Democratic by 56.6 points, 2024
- California District 38· New lines for 2026, old result not shown
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- California District 43· Maxine Waters (D), Democratic by 50.2 points, 2024
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- California District 52· New lines for 2026, old result not shown
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Official results for California
History (25 elections for this seat)
- Votes for listed candidates
- 364,544
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2025)
US House, California District 10, 2024, every candidate Candidate Party Votes and share Share DemocraticMark DeSaulnierWon Democratic 242,32566.5% RepublicanKatherine Piccinini Republican 122,21933.5% - Votes for listed candidates
- 251,380
- Election day
- November 8, 2022
- District map
- Older district map (2022 to 2025)
US House, California District 10, 2022, every candidate Candidate Party Votes and share Share DemocraticMark DeSaulnierWon Democratic 198,41578.9% GreenMichael Ernest Kerr Green 52,96521.1% - Votes for listed candidates
- 302,494
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2020)
US House, California District 10, 2020, every candidate Candidate Party Votes and share Share DemocraticJosh HarderWon Democratic 166,86555.2% RepublicanTed Howze Republican 135,62944.8% - Votes for listed candidates
- 221,900
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2020)
US House, California District 10, 2018, every candidate Candidate Party Votes and share Share DemocraticJosh HarderWon Democratic 115,94552.3% RepublicanJeff Denham Republican 105,95547.7% - Votes for listed candidates
- 241,141
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2020)
US House, California District 10, 2016, every candidate Candidate Party Votes and share Share RepublicanJeff DenhamWon Republican 124,67151.7% DemocraticMichael Eggman Democratic 116,47048.3% - Votes for listed candidates
- 125,705
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2020)
US House, California District 10, 2014, every candidate Candidate Party Votes and share Share RepublicanJeff DenhemWon Republican 70,58256.1% DemocraticMichael Eggman Democratic 55,12343.9% - Votes for listed candidates
- 209,199
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2020)
US House, California District 10, 2012, every candidate Candidate Party Votes and share Share RepublicanJeff DenhamWon Republican 110,26552.7% DemocraticJose Hernandez Democratic 98,93447.3% - Votes for listed candidates
- 233,806
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2010)
US House, California District 10, 2010, every candidate Candidate Party Votes and share Share DemocraticJohn GaramendiWon Democratic 137,57858.8% RepublicanGary Clift Republican 88,51237.9% GreenJeremy Cloward Green 7,7163.3% - Votes for listed candidates
- 295,165
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2010)
US House, California District 10, 2008, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 192,22665.1% RepublicanNicholas Gerber Republican 91,87731.1% OtherEugene E Ruyle Other 11,0623.7% - Votes for listed candidates
- 196,978
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2010)
US House, California District 10, 2006, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 130,85966.4% RepublicanDarcy Linn Republican 66,06933.5% Scattered write-insName as filed: Writein Write-in 500.0% - Votes for listed candidates
- 278,099
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2010)
US House, California District 10, 2004, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 182,75065.7% RepublicanJeff Ketelson Republican 95,34934.3% - Votes for listed candidates
- 167,197
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2010)
US House, California District 10, 2002, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 126,39075.6% LibertarianSonia Esther Harden Libertarian 40,80724.4% - Votes for listed candidates
- 304,819
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2000)
US House, California District 10, 2000, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 160,42952.6% RepublicanClaude B Hutchison Jr Republican 134,86344.2% OtherValerie Irene Janlois Other 9,5273.1% - Votes for listed candidates
- 237,809
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2000)
US House, California District 10, 1998, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 127,13453.5% RepublicanCharles Ball Republican 103,29943.4% OtherValerie Janlois Other 3,9411.7% OtherJohn Place Other 3,4351.4% - Votes for listed candidates
- 283,183
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2000)
US House, California District 10, 1996, every candidate Candidate Party Votes and share Share DemocraticEllen O TauscherWon Democratic 137,72648.6% RepublicanBill Baker Republican 133,63347.2% OtherJohn Place Other 6,3542.2% OtherValerie Janlois Other 3,0471.1% LibertarianGregory K Lyon Libertarian 2,4230.9% - Votes for listed candidates
- 234,241
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2000)
US House, California District 10, 1994, every candidate Candidate Party Votes and share Share RepublicanBill BakerWon Republican 138,91659.3% DemocraticEllen Schwartz Democratic 90,52338.6% OtherCraig W Cooper Other 4,8022.1% - Votes for listed candidates
- 280,429
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2000)
US House, California District 10, 1992, every candidate Candidate Party Votes and share Share RepublicanBill BakerWon Republican 145,70252.0% DemocraticWendell H Williams Democratic 134,63548.0% Scattered write-insName as filed: Writein Write-in 920.0% - Votes for listed candidates
- 130,637
- Election day
- November 6, 1990
- District map
- Older district map (1982 to 1990)
US House, California District 10, 1990, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 81,87562.7% RepublicanMark Patrosso Republican 48,74737.3% Scattered write-insName as filed: Writein Write-in 150.0% - Votes for listed candidates
- 165,301
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1990)
US House, California District 10, 1988, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 142,50086.2% LibertarianKennita Watson Libertarian 22,80113.8% - Votes for listed candidates
- 119,564
- Election day
- November 4, 1986
- District map
- Older district map (1982 to 1990)
US House, California District 10, 1986, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 84,24070.5% RepublicanMichael R La Crone Republican 31,82626.6% LibertarianPerr Cardestam Libertarian 1,7971.5% OtherBradley L Mayer Other 1,7011.4% - Votes for listed candidates
- 164,177
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1990)
US House, California District 10, 1984, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 102,46962.4% RepublicanRobert P Herriot Republican 56,25634.3% LibertarianPerr Cadestam Libertarian 2,7891.7% OtherEdmon V Kaiser Other 2,6631.6% - Votes for listed candidates
- 123,281
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1990)
US House, California District 10, 1982, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 77,26362.7% RepublicanBob Herriott Republican 41,50633.7% LibertarianDale Burrow Libertarian 2,4031.9% OtherEdmon V Kaiser Other 2,1091.7% - Votes for listed candidates
- 164,543
- Election day
- November 4, 1980
- District map
- Older district map (1972 to 1980)
US House, California District 10, 1980, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 102,23162.1% RepublicanJohn M Lutton Republican 45,98727.9% LibertarianJoseph Fuhrig Libertarian 11,9047.2% OtherEdmon V Kaiser Other 4,4212.7% - Votes for listed candidates
- 125,862
- Election day
- November 7, 1978
- District map
- Older district map (1972 to 1980)
US House, California District 10, 1978, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 84,48867.1% RepublicanRudy Hansen Republican 41,37432.9% - Votes for listed candidates
- 155,443
- Election day
- November 2, 1976
- District map
- Older district map (1972 to 1980)
US House, California District 10, 1976, every candidate Candidate Party Votes and share Share DemocraticDon EdwardsWon Democratic 111,99272.0% RepublicanHerb Smith Republican 38,08824.5% OtherEdmon V Kaiser Other 5,3633.5%
1976 to 2024: MIT Election Data and Science Lab, U.S. House 1976-2024, retrieved Oct 28, 2026. Compiled by MIT Election Data and Science Lab (MEDSL) from official returns; not an official source
California District 10 was redrawn for 2026, so every row here ran on older lines and covers different territory. The map in force, by state
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Cite this page
Election Wrld. (2026). California District 10, US House results. https://www.electionwrld.com/ca/congress/10. Retrieved October 30, 2026.
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Sources
Sources: MIT Election Data and Science Lab, U.S. House 1976-2024 (CC0 1.0), retrieved Oct 28, 2026, compiled by MIT Election Data and Science Lab (MEDSL) from official returns, not an official source; Census TIGERweb Legislative MapServer (120th CDs layer 0, 119th CDs layer 4, 2026 SLD upper layer 1 and lower layer 2) (US Census Bureau, public domain), retrieved Oct 28, 2026; unitedstates/congress-legislators (current) (CC0-1.0), retrieved Oct 28, 2026, compiled by the @unitedstates project volunteers (rosters from official congressional sources) from official returns, not an official source.
DataState data (JSON)Sources: MIT Election Data and Science Lab, U.S. House 1976-2024, FEC, DIME (ODC-BY), Portraits: unitedstates/images (public domain)Data as of Oct 28, 2026