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California

San Mateo County, California presidential election results

In 2024 Kamala Harris won San Mateo County by 50.3 points, out of 330,565 votes for president.

Amador (no county figures)Glenn (no county figures)Lake (no county figures)Mariposa (no county figures)Napa (no county figures)Shasta (no county figures)Stanislaus (no county figures)Yuba (no county figures)Alpine (no county figures)Butte (no county figures)Mendocino (no county figures)Modoc (no county figures)Mono (no county figures)Nevada (no county figures)Orange (no county figures)Riverside (no county figures)San Benito (no county figures)San Diego (no county figures)San Francisco (no county figures)Yolo (no county figures)San Mateo County: Kamala Harris +50.3Santa Barbara (no county figures)Santa Cruz (no county figures)Solano (no county figures)Sutter (no county figures)Tehama (no county figures)Tuolumne (no county figures)Calaveras (no county figures)Contra Costa (no county figures)Del Norte (no county figures)Imperial (no county figures)Kern (no county figures)Kings (no county figures)Madera (no county figures)Colusa (no county figures)Inyo (no county figures)Merced (no county figures)Plumas (no county figures)San Joaquin (no county figures)Sierra (no county figures)Tulare (no county figures)Marin (no county figures)Monterey (no county figures)Placer (no county figures)Fresno (no county figures)Humboldt (no county figures)Lassen (no county figures)Los Angeles (no county figures)Sacramento (no county figures)San Bernardino (no county figures)Ventura (no county figures)Alameda (no county figures)San Luis Obispo (no county figures)Siskiyou (no county figures)Sonoma (no county figures)Trinity (no county figures)El Dorado (no county figures)Santa Clara (no county figures)
D+60R+60D+30R+302000: D+33.320002004: D+40.420042008: D+48.820082012: D+46.620122016: D+57.320162020: D+57.720202024: D+50.32024
San Mateo County margin: Republican minus Democratic share, in points. Bars above the line lean Republican, below lean Democratic.

2024

California 2024
TicketVotesShareBar
Kamala Harris DEM242,95773.5%
Donald J. Trump REP76,61623.2%
Jill Stein GRN4,1241.2%
Robert F. Kennedy Jr. AI3,7511.1%
Chase Oliver LIB1,6870.5%
Claudia De la Cruz PF1,3750.4%
Peter Sonski (W/I)550.0%
Total330,565

San Mateo County was D+50.3 against D+20.1 statewide, 30.2 points more Democratic than the state.

Source: California Secretary of State, Statement of Vote, November 5, 2024 General Election; President by County (printed pages 16-18 = PDF pages 18-20)

2020

California 2020
TicketVotesShareBar
Joseph R. Biden DEM291,49677.9%
Donald J. Trump REP75,58420.2%
Jo Jorgensen LIB3,5540.9%
Howie Hawkins GRN1,5950.4%
Roque "Rocky" De La Fuente Guerra AI1,1450.3%
Gloria La Riva PF7970.2%
Brian Carroll (W/I)590.0%
Jesse Ventura (W/I)120.0%
Mark Charles (W/I)40.0%
Brock Pierce (W/I)30.0%
Joseph Kishore (W/I)20.0%
Total374,251

San Mateo County was D+57.7 against D+29.2 statewide, 28.5 points more Democratic than the state.

Source: California Secretary of State, Statement of Vote, November 3, 2020 General Election; President by County (printed pages 18-23 = PDF pages 22-27; the write-in candidates continue in a second column block)

2016

California 2016
TicketVotesShareBar
Hillary Clinton DEM237,88275.7%
Donald J. Trump57,92918.4%
Gary Johnson LIB9,4643.0%
Jill Stein (GRN)5,1021.6%
Bernard "Bernie" Sanders (W/I)2,1590.7%
Gloria Estela La Riva (PF)1,0470.3%
Evan McMullin (W/I)7600.2%
Mike Maturen (W/I)230.0%
Laurence Kotlikoff (W/I)150.0%
Jerry White (W/I)30.0%
Total314,384

San Mateo County was D+57.3 against D+30.1 statewide, 27.2 points more Democratic than the state.

Source: California Secretary of State, Statement of Vote, November 8, 2016, General Election (81 pages): President by county (pages 19-24; pages 22-24 hold two more write-in columns)

2012

California 2012
TicketVotesShareBar
Barack Obama DEM206,08572.1%
Mitt Romney REP72,75625.5%
Gary Johnson LIB2,9261.0%
Jill Stein GRN1,9570.7%
Roseanne Barr PF8190.3%
Thomas Hoefling AI5970.2%
Ron Paul NPP (W/I)5350.2%
Ross C. "Rocky" Anderson NPP (W/I)270.0%
James Harris NPP (W/I)60.0%
Virgil Goode NPP (W/I)50.0%
Stewart Alexander NPP (W/I)40.0%
Jerry White NPP (W/I)20.0%
Stephen Durham NPP (W/I)10.0%
Shelia "Samm" Tittle NPP (W/I)00.0%
Total285,720

San Mateo County was D+46.6 against D+23.1 statewide, 23.5 points more Democratic than the state.

Source: California Secretary of State, Statement of Vote, November 6, 2012 General Election; President by County (printed pages 17-22 = PDF pages 19-24; the write-in candidates continue in a second column block). * = incumbent

2008

California 2008
TicketVotesShareBar
Barack Obama DEM222,82673.5%
John McCain REP75,05724.7%
All other candidates5,4091.8%
Total303,292

San Mateo County was D+48.8 against D+24.1 statewide, 24.8 points more Democratic than the state.

Source: MIT Election Data and Science Lab, County Presidential Election Returns 2000-2016 (compiled from official state election records)

2004

California 2004
TicketVotesShareBar
John Kerry DEM197,92269.7%
George W. Bush REP83,31529.3%
All other candidates2,8401.0%
Total284,077

San Mateo County was D+40.4 against D+9.9 statewide, 30.5 points more Democratic than the state.

Source: MIT Election Data and Science Lab, County Presidential Election Returns 2000-2016 (compiled from official state election records)

2000

California 2000
TicketVotesShareBar
Albert Gore, Jr. DEM166,75764.3%
George W. Bush REP80,29631.0%
All other candidates12,3464.8%
Total259,399

San Mateo County was D+33.3 against D+11.8 statewide, 21.5 points more Democratic than the state.

Source: MIT Election Data and Science Lab, County Presidential Election Returns 2000-2016 (compiled from official state election records)

Questions and answers

Who won San Mateo County, California in 2024?

Kamala Harris won San Mateo County by 50.3 points, out of 330,565 votes counted for president.

Is San Mateo County Republican or Democratic?

Presidential results: 2024: Democratic by 50.3 points; 2020: Democratic by 57.7 points; 2016: Democratic by 57.3 points; 2012: Democratic by 46.6 points; 2008: Democratic by 48.8 points; 2004: Democratic by 40.4 points; 2000: Democratic by 33.3 points.

How does San Mateo County vote compared with the rest of California?

In 2024 it was 30.2 points more Democratic than the state as a whole (Democratic by 50.3 points against Democratic by 20.1 points statewide).

Official results As published by The American Presidency Project (UC Santa Barbara) and the state documents it links. How we use this data