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San Mateo County, CA


Metropolitan Statistical Area: San Francisco-Oakland-Berkeley, CA
Designated Market Area: San Francisco-Oakland-San Jose, CA
American Communities Project County Type (2023): Urban Suburbs

Places in San Mateo County, CA     [Sort places by name]

 

Tracts in San Mateo County, CA

   



Click here to view demographic data for San Mateo County, CA

2022 population: 729,181   ( 10,730 from 2010 , 35,251 from 2020)
Land area: 448.6 square miles
Population density: 1625.4 persons per square mile

2022 Census data
White:267,673 36.71% 11.8%
Black:16,0162.20% 14.6%
Indian:1,0250.14% 8.9%
Asian:242,52833.26% 30.5%
2+ races:28,6433.93% 19.7%
Hispanic:173,29623.77% 5.0%
Total non-White:461,50863.29% 11.2%

2020-2022 ComponentsNumberRate
Births:17,014 11.1
Deaths:11,7647.7
Net Migration: -46,010-30.1
Net Immigration: 6,4944.2
Change in White population:-35,936 -5.0
Change in Non-White pop.:46,666 6.5



Historical Presidential Election Results for San Mateo County, CA

Recent Trends
VotesΔ MarginSwing %
2020 vs. 2016 R +17,655 D +35,959 R + 2.0%
D +53,614
2020 vs. 2012 R +2,828 D +82,583 D + 11.0%
D +85,411
2020 vs. 2008 R +527 D +68,143 D + 9.2%
D +68,670
2016 vs. 2008 R -17,128 D +32,184 D + 11.2%
D +15,056
How to interpret this table


Click on the Year to view county-level data for that election.

YearTurnout WinnerRunner-Up OtherTotal Votes Diff
(St) 		Diff
(US) 		PSV
2020 64% Joe Biden (D) 291,496 77.9% Donald Trump* (R) 75,584 20.2% 7,171 [+] 1.9% 374,251 -14 -27 2.14%
2016 54% Hillary Clinton (D) 237,882 75.7% Donald Trump (R) 57,929 18.4% 18,573 [+] 5.9% 314,384 -13 -27 2.21%
2012 50% Barack Obama* (D) 206,085 72.1% Mitt Romney (R) 72,756 25.5% 6,879 [+] 2.4% 285,720 -12 -22 2.19%
2008 55% Barack Obama (D) 222,826 73.5% John McCain (R) 75,057 24.7% 5,409 [+] 1.8% 303,292 -12 -21 2.23%
2004 52% John Kerry (D) 197,922 69.5% George W. Bush* (R) 83,315 29.2% 3,620 [+] 1.3% 284,857 -15 -21 2.29%
2000 48% Albert Gore, Jr. (D) 166,757 64.3% George W. Bush (R) 80,296 31.0% 12,346 [+] 4.8% 259,399 -11 -17 2.37%
1996 47% Bill Clinton* (D) 152,304 60.6% Robert Dole (R) 73,508 29.2% 25,720 [+] 10.2% 251,532 -9 -11 2.51%
1992 54% Bill Clinton (D) 149,232 54.0% George Bush* (R) 75,080 27.2% 52,196 [+] 18.9% 276,508 -5 -10 2.48%
1988 51% Michael Dukakis (D) 141,859 55.7% George Bush (R) 109,261 42.9% 3,360 [+] 1.3% 254,480 -8 -10 2.57%
1984 55% Ronald Reagan* (R) 135,185 51.9% Walter Mondale (D) 122,268 46.9% 3,178 1.2% 260,631 -6 -7 2.74%
1980 53% Ronald Reagan (R) 116,491 48.8% Jimmy Carter* (D) 87,335 36.6% 34,811 [+] 14.6% 238,637 -4 -2 2.78%
1976 57% Gerald Ford* (R) 117,338 50.6% Jimmy Carter (D) 102,896 44.4% 11,507 [+] 5.0% 231,741 1 3 2.95%
1972 65% Richard Nixon* (R) 135,377 52.8% George McGovern (D) 109,745 42.8% 11,175 [+] 4.4% 256,297 -2 -8 3.06%
1968 65% Hubert Humphrey (D) 106,519 47.2% Richard Nixon (R) 98,654 43.7% 20,495 [+] 9.1% 225,668 -4 0 3.11%
1964 69% Lyndon Johnson* (D) 140,978 64.3% Barry Goldwater (R) 77,916 35.5% 297 0.1% 219,191 -5 -3 3.11%
1960 70% Richard Nixon (R) 104,570 51.7% John Kennedy (D) 97,154 48.0% 528 0.3% 202,252 2 2 3.11%
1956 65% Dwight Eisenhower* (R) 100,049 61.0% Adlai Stevenson (D) 63,637 38.8% 217 0.1% 163,903 6 4 3.00%
1952 75% Dwight Eisenhower (R) 92,279 63.6% Adlai Stevenson (D) 52,149 35.9% 651 0.4% 145,079 7 8 2.82%
1948 56% Thomas Dewey (R) 48,909 56.7% Harry Truman* (D) 34,215 39.7% 3,148 [+] 3.6% 86,272 10 12 2.14%
1944 58% Franklin Roosevelt* (D) 34,594 50.6% Thomas Dewey (R) 33,590 49.1% 158 0.2% 68,342 6 3 1.94%
1940 70% Franklin Roosevelt* (D) 29,831 52.4% Wendell Willkie (R) 26,539 46.6% 581 1.0% 56,951 5 2 1.74%
1936 60% Franklin Roosevelt* (D) 27,087 65.7% Alf Landon (R) 13,650 33.1% 511 [+] 1.2% 41,248 1 -3 1.56%
1932 57% Franklin Roosevelt (D) 19,094 56.4% Herbert Hoover* (R) 13,442 39.7% 1,343 [+] 4.0% 33,879 2 0 1.49%
1928 51% Herbert Hoover (R) 14,360 58.9% Al Smith (D) 9,755 40.0% 277 [+] 1.1% 24,392 -6 1 1.36%
1924 40% Calvin Coolidge (R) 8,126 55.3% Robert LaFollette (Prog) 5,694 38.7% 882 [+] 6.0% 14,702 -2 1 1.15%
1920 40% Warren Harding (R) 7,205 70.5% James Cox (D) 1,958 19.2% 1,054 [+] 10.3% 10,217 4 10 1.08%
1916 45% Charles Evans Hughes (R) 5,207 50.0% Woodrow Wilson* (D) 4,485 43.1% 719 [+] 6.9% 10,411 4 4 1.04%
1912 34% Woodrow Wilson (D) 3,246 46.5% Theodore Roosevelt (Prog) 2,825 40.4% 914 [+] 13.1% 6,985 0 -23 1.03%
1908 28% William Taft (R) 2,865 62.9% William J. Bryan (D) 1,314 28.9% 375 [+] 8.2% 4,554 7 11 1.18%
1904 26% Theodore Roosevelt (R) 2,146 68.5% Alton Parker (D) 851 27.1% 138 [+] 4.4% 3,135 7 12 0.95%
1900 32% William McKinley* (R) 1,645 63.0% William J. Bryan (D) 914 35.0% 52 [+] 2.0% 2,611 9 11 0.86%
* incumbent         PSV: percent of state vote



2020 President, San Mateo County, CA
CandidateVotesPct
Joe Biden (D) 291,496 77.9%
Donald Trump* (R) 75,584 20.2%
Jo Jorgensen (Lbt) 3,554 0.9%
Other 3,617 1.0%
TOTAL 374,251
Turnout: 64% Diff (St): -14 Diff (US): -27


2016 President, San Mateo County, CA
CandidateVotesPct
Hillary Clinton (D) 237,882 75.7%
Donald Trump (R) 57,929 18.4%
Gary Johnson (Lbt) 9,464 3.0%
Jill Stein (Grn) 5,102 1.6%
Evan McMullin (I) 760 0.2%
Other 3,247 1.0%
TOTAL 314,384
Turnout: 54% Diff (St): -13 Diff (US): -27


2012 President, San Mateo County, CA
CandidateVotesPct
Barack Obama* (D) 206,085 72.1%
Mitt Romney (R) 72,756 25.5%
Gary Johnson (Lbt) 2,926 1.0%
Other 3,953 1.4%
TOTAL 285,720
Turnout: 50% Diff (St): -12 Diff (US): -22


2008 President, San Mateo County, CA
CandidateVotesPct
Barack Obama (D) 222,826 73.5%
John McCain (R) 75,057 24.7%
Ralph Nader (I) 2,227 0.7%
Bob Barr (Lbt) 1,376 0.5%
Other 1,806 0.6%
TOTAL 303,292
Turnout: 55% Diff (St): -12 Diff (US): -21


2004 President, San Mateo County, CA
CandidateVotesPct
George W. Bush* (R) 83,315 29.2%
John Kerry (D) 197,922 69.5%
Other 3,620 1.3%
TOTAL 284,857
Turnout: 52% Diff (St): -15 Diff (US): -21


2000 President, San Mateo County, CA
CandidateVotesPct
George W. Bush (R) 80,296 31.0%
Albert Gore, Jr. (D) 166,757 64.3%
Ralph Nader (Grn) 10,433 4.0%
Pat Buchanan (Ref) 547 0.2%
Other 1,366 0.5%
TOTAL 259,399
Turnout: 48% Diff (St): -11 Diff (US): -17


1996 President, San Mateo County, CA
CandidateVotesPct
Bill Clinton* (D) 152,304 60.6%
Robert Dole (R) 73,508 29.2%
Ross Perot (Ref) 15,047 6.0%
Ralph Nader (Grn) 7,336 2.9%
Harry Browne (Lbt) 2,048 0.8%
Other 1,289 0.5%
TOTAL 251,532
Turnout: 47% Diff (St): -9 Diff (US): -11


1992 President, San Mateo County, CA
CandidateVotesPct
Bill Clinton (D) 149,232 54.0%
George Bush* (R) 75,080 27.2%
Ross Perot (I) 50,465 18.3%
Other 1,731 0.6%
TOTAL 276,508
Turnout: 54% Diff (St): -5 Diff (US): -10


1988 President, San Mateo County, CA
CandidateVotesPct
George Bush (R) 109,261 42.9%
Michael Dukakis (D) 141,859 55.7%
Ron Paul (Lbt) 2,139 0.8%
Other 1,221 0.5%
TOTAL 254,480
Turnout: 51% Diff (St): -8 Diff (US): -10


1984 President, San Mateo County, CA
CandidateVotesPct
Ronald Reagan* (R) 135,185 51.9%
Walter Mondale (D) 122,268 46.9%
Other 3,178 1.2%
TOTAL 260,631
Turnout: 55% Diff (St): -6 Diff (US): -7


1980 President, San Mateo County, CA
CandidateVotesPct
Ronald Reagan (R) 116,491 48.8%
Jimmy Carter* (D) 87,335 36.6%
John Anderson (I) 27,985 11.7%
Edward Clark (Lbt) 4,744 2.0%
Other 2,082 0.9%
TOTAL 238,637
Turnout: 53% Diff (St): -4 Diff (US): -2


1976 President, San Mateo County, CA
CandidateVotesPct
Jimmy Carter (D) 102,896 44.4%
Gerald Ford* (R) 117,338 50.6%
Eugene McCarthy (I) 2,409 1.0%
Other 9,098 3.9%
TOTAL 231,741
Turnout: 57% Diff (St): 1 Diff (US): 3


1972 President, San Mateo County, CA
CandidateVotesPct
Richard Nixon* (R) 135,377 52.8%
George McGovern (D) 109,745 42.8%
John Schmitz (Amer) 4,079 1.6%
Other 7,096 2.8%
TOTAL 256,297
Turnout: 65% Diff (St): -2 Diff (US): -8


1968 President, San Mateo County, CA
CandidateVotesPct
Richard Nixon (R) 98,654 43.7%
Hubert Humphrey (D) 106,519 47.2%
George Wallace (AIP) 14,720 6.5%
Other 5,775 2.6%
TOTAL 225,668
Turnout: 65% Diff (St): -4 Diff (US): 0


1964 President, San Mateo County, CA
CandidateVotesPct
Lyndon Johnson* (D) 140,978 64.3%
Barry Goldwater (R) 77,916 35.5%
Other 297 0.1%
TOTAL 219,191
Turnout: 69% Diff (St): -5 Diff (US): -3


1960 President, San Mateo County, CA
CandidateVotesPct
John Kennedy (D) 97,154 48.0%
Richard Nixon (R) 104,570 51.7%
Other 528 0.3%
TOTAL 202,252
Turnout: 70% Diff (St): 2 Diff (US): 2


1956 President, San Mateo County, CA
CandidateVotesPct
Dwight Eisenhower* (R) 100,049 61.0%
Adlai Stevenson (D) 63,637 38.8%
Other 217 0.1%
TOTAL 163,903
Turnout: 65% Diff (St): 6 Diff (US): 4


1952 President, San Mateo County, CA
CandidateVotesPct
Dwight Eisenhower (R) 92,279 63.6%
Adlai Stevenson (D) 52,149 35.9%
Other 651 0.4%
TOTAL 145,079
Turnout: 75% Diff (St): 7 Diff (US): 8


1948 President, San Mateo County, CA
CandidateVotesPct
Harry Truman* (D) 34,215 39.7%
Thomas Dewey (R) 48,909 56.7%
Henry Wallace (Prog) 2,993 3.5%
Other 155 0.2%
TOTAL 86,272
Turnout: 56% Diff (St): 10 Diff (US): 12


1944 President, San Mateo County, CA
CandidateVotesPct
Franklin Roosevelt* (D) 34,594 50.6%
Thomas Dewey (R) 33,590 49.1%
Other 158 0.2%
TOTAL 68,342
Turnout: 58% Diff (St): 6 Diff (US): 3


1940 President, San Mateo County, CA
CandidateVotesPct
Franklin Roosevelt* (D) 29,831 52.4%
Wendell Willkie (R) 26,539 46.6%
Other 581 1.0%
TOTAL 56,951
Turnout: 70% Diff (St): 5 Diff (US): 2


1936 President, San Mateo County, CA
CandidateVotesPct
Franklin Roosevelt* (D) 27,087 65.7%
Alf Landon (R) 13,650 33.1%
Norman Thomas (Soc) 253 0.6%
Other 258 0.6%
TOTAL 41,248
Turnout: 60% Diff (St): 1 Diff (US): -3


1932 President, San Mateo County, CA
CandidateVotesPct
Franklin Roosevelt (D) 19,094 56.4%
Herbert Hoover* (R) 13,442 39.7%
Norman Thomas (Soc) 982 2.9%
Other 361 1.1%
TOTAL 33,879
Turnout: 57% Diff (St): 2 Diff (US): 0


1928 President, San Mateo County, CA
CandidateVotesPct
Herbert Hoover (R) 14,360 58.9%
Al Smith (D) 9,755 40.0%
Norman Thomas (Soc) 267 1.1%
Other 10 0.0%
TOTAL 24,392
Turnout: 51% Diff (St): -6 Diff (US): 1


1924 President, San Mateo County, CA
CandidateVotesPct
Calvin Coolidge (R) 8,126 55.3%
John Davis (D) 771 5.2%
Robert LaFollette (Prog) 5,694 38.7%
Other 111 0.8%
TOTAL 14,702
Turnout: 40% Diff (St): -2 Diff (US): 1


1920 President, San Mateo County, CA
CandidateVotesPct
Warren Harding (R) 7,205 70.5%
James Cox (D) 1,958 19.2%
Eugene Debs (Soc) 956 9.4%
Aaron Watkins (Proh) 98 1.0%
TOTAL 10,217
Turnout: 40% Diff (St): 4 Diff (US): 10


1916 President, San Mateo County, CA
CandidateVotesPct
Woodrow Wilson* (D) 4,485 43.1%
Charles Evans Hughes (R) 5,207 50.0%
Allan Benson (Soc) 540 5.2%
James Hanly (Proh) 179 1.7%
TOTAL 10,411
Turnout: 45% Diff (St): 4 Diff (US): 4


1912 President, San Mateo County, CA
CandidateVotesPct
Woodrow Wilson (D) 3,246 46.5%
Theodore Roosevelt (Prog) 2,825 40.4%
William Taft* (R) 7 0.1%
Eugene Debs (Soc) 827 11.8%
Eugene Chafin (Proh) 80 1.1%
TOTAL 6,985
Turnout: 34% Diff (St): 0 Diff (US): -23


1908 President, San Mateo County, CA
CandidateVotesPct
William Taft (R) 2,865 62.9%
William J. Bryan (D) 1,314 28.9%
Eugene Debs (Soc) 301 6.6%
Eugene Chafin (Proh) 29 0.6%
Thomas Hisgen (I) 45 1.0%
TOTAL 4,554
Turnout: 28% Diff (St): 7 Diff (US): 11


1904 President, San Mateo County, CA
CandidateVotesPct
Theodore Roosevelt (R) 2,146 68.5%
Alton Parker (D) 851 27.1%
Eugene Debs (Soc) 124 4.0%
Silas Swallow (Proh) 14 0.4%
TOTAL 3,135
Turnout: 26% Diff (St): 7 Diff (US): 12


1900 President, San Mateo County, CA
CandidateVotesPct
William McKinley* (R) 1,645 63.0%
William J. Bryan (D) 914 35.0%
Other 52 2.0%
TOTAL 2,611
Turnout: 32% Diff (St): 9 Diff (US): 11
* incumbent

Historical Statewide Election Results for San Mateo County, CA

Click on the Year to view county-level data for that election.

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 42% Alex Padilla* (D) 186,891 76.4% Mark Meuser (R) 57,825 23.6% 0 0.0% 244,716 -15 2.26%
2022 G 43% Gavin Newsom* (D) 185,599 75.0% Brian Dahle (R) 61,918 25.0% 0 0.0% 247,517 -16 2.26%
2018 S1 45% Dianne Feinstein* (D) 168,679 63.0% Kevin DeLeon (D) 99,136 37.0% 0 0.0% 267,815 n/a 2.41%
2018 G 48% Gavin Newsom (D) 213,282 75.2% John H. Cox (R) 70,242 24.8% 0 0.0% 283,524 -13 2.27%
2016 S3 48% Kamala Harris (D) 199,956 71.1% Loretta Sanchez (D) 81,090 28.9% 0 0.0% 281,046 n/a 2.30%
2014 G 28% Jerry Brown* (D) 120,280 75.2% Neel Kashkari (R) 39,615 24.8% 0 0.0% 159,895 -15 2.19%
2012 S1 49% Dianne Feinstein* (D) 213,503 77.2% Elizabeth Emken (R) 62,979 22.8% 0 0.0% 276,482 -15 2.20%
2010 S3 39% Barbara Boxer* (D) 146,537 66.5% Carly Fiorina (R) 65,803 29.8% 8,182 [+] 3.7% 220,522 -12 2.21%
2010 G 40% Jerry Brown (D) 145,970 65.7% Meg Whitman (R) 69,212 31.1% 7,064 [+] 3.2% 222,246 -10 2.20%
2006 S1 37% Dianne Feinstein* (D) 152,082 74.8% Dick Mountjoy (R) 41,043 20.2% 10,200 [+] 5.0% 203,325 -15 2.38%
2006 G 37% Phil Angelides (D) 97,092 47.4% Arnold Schwarzenegger* (R) 96,478 47.1% 11,194 [+] 5.5% 204,764 -9 2.36%
2004 S3 51% Barbara Boxer* (D) 196,285 70.5% Bill Jones (R) 73,171 26.3% 8,841 [+] 3.2% 278,297 -12 2.31%
2003 G 36% Cruz Bustamante (D) 86,854 44.5% Arnold Schwarzenegger (R) 68,191 34.9% 40,183 [+] 20.6% 195,228 2 2.25%
2002 G 31% Gray Davis* (D) 99,803 58.0% Bill Simon (R) 51,497 29.9% 20,907 [+] 12.1% 172,207 -13 2.30%
2000 S1 47% Dianne Feinstein* (D) 165,216 64.8% Tom Campbell (R) 76,273 29.9% 13,469 [+] 5.3% 254,958 -7 2.40%
1998 S3 38% Barbara Boxer* (D) 130,064 63.1% Matt Fong (R) 69,776 33.9% 6,146 [+] 3.0% 205,986 -9 2.48%
1998 G 39% Gray Davis (D) 142,144 68.4% Dan Lungren (R) 59,249 28.5% 6,320 [+] 3.0% 207,713 -10 2.48%
1994 S1 41% Dianne Feinstein* (D) 136,686 64.2% Michael Huffington (R) 63,702 29.9% 12,399 [+] 5.8% 212,787 -15 2.50%
1994 G 41% Kathleen Brown (D) 106,391 49.2% Pete Wilson* (R) 102,989 47.6% 6,836 [+] 3.2% 216,216 -8 2.50%
1992 S3 52% Barbara Boxer (D) 158,490 59.4% Bruce Herschensohn (R) 87,209 32.7% 21,186 [+] 7.9% 266,885 -10 2.47%
1992 S1 52% Dianne Feinstein (D) 181,990 67.3% John Seymour (R) 75,470 27.9% 13,145 [+] 4.9% 270,605 -10 2.51%
1990 G 39% Dianne Feinstein (D) 109,963 55.4% Pete Wilson (R) 80,253 40.5% 8,180 [+] 4.1% 198,396 -9 2.58%
1988 S1 50% Leo McCarthy (D) 125,724 51.1% Pete Wilson* (R) 111,187 45.2% 9,003 [+] 3.7% 245,914 -8 2.52%
1986 S3 40% Alan Cranston* (D) 104,485 53.7% Ed Zschau (R) 86,518 44.4% 3,715 [+] 1.9% 194,718 -3 2.63%
1986 G 41% George Deukmejian* (R) 121,910 61.8% Tom Bradley (D) 71,329 36.2% 3,906 [+] 2.0% 197,145 1 2.65%
1982 S1 46% Pete Wilson (R) 103,493 49.2% Jerry Brown (D) 98,862 47.0% 8,204 [+] 3.9% 210,559 -2 2.70%
1982 G 47% Tom Bradley (D) 108,374 50.5% George Deukmejian (R) 99,527 46.4% 6,768 [+] 3.2% 214,669 -3 2.73%
1980 S3 51% Alan Cranston* (D) 145,208 63.6% Paul Gann (R) 61,810 27.1% 21,244 [+] 9.3% 228,262 -10 2.74%
1978 G 49% Jerry Brown* (D) 113,402 56.2% Evelle Younger (R) 69,131 34.2% 19,315 [+] 9.6% 201,848 -2 2.92%
1976 S1 56% Sam Hayakawa (R) 112,445 49.6% John Tunney* (D) 105,541 46.6% 8,657 [+] 3.8% 226,643 -1 3.03%
1974 S3 45% Alan Cranston* (D) 117,714 65.9% Bill Richardson (R) 55,695 31.2% 5,318 [+] 3.0% 178,727 -5 2.93%
1974 G 46% Jerry Brown (D) 91,808 49.6% Houston Flournoy (R) 88,235 47.7% 4,983 [+] 2.7% 185,026 0 2.96%
1970 S1 55% John Tunney (D) 113,844 56.6% George Murphy* (R) 84,054 41.8% 3,287 [+] 1.6% 201,185 -3 3.10%
1970 G 55% Ronald Reagan* (R) 109,356 54.3% Jess Unruh (D) 88,069 43.7% 3,941 [+] 2.0% 201,366 1 3.09%
1968 S3 63% Alan Cranston (D) 127,171 58.3% Max Rafferty (R) 88,801 40.7% 2,252 [+] 1.0% 218,224 -6 3.07%
1966 G 60% Ronald Reagan (R) 107,498 53.6% Pat Brown* (D) 92,654 46.2% 276 [+] 0.1% 200,428 -4 3.08%
1964 S1 68% George Murphy (R) 109,924 50.6% Pierre Salinger* (D) 107,050 49.3% 62 [+] 0.0% 217,036 -1 3.08%
1962 S3 55% Thomas Kuchel* (R) 103,774 62.4% Richard Richards (D) 62,292 37.5% 200 [+] 0.1% 166,266 6 2.94%
1962 G 58% Pat Brown* (D) 90,464 51.9% Richard Nixon (R) 82,115 47.1% 1,797 [+] 1.0% 174,376 0 2.98%
*: incumbent               +: ran on additional party lines               Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election           RO: runoff election           PSV: percent of state vote


Historical U.S. House Election Results for San Mateo County, CA

Click on the District to view county-level data for that election (where available).

DateDistrictWinnerRunner-Up OtherTotal Votes
2022-11-08 CA15Kevin Mullin (D) 95,873 56.2% David Canepa (D) 74,665 43.8% 0 0.0% 170,538
2022-11-08 CA16Anna Eshoo* (D) 29,474 59.7% Rishi Kumar (D) 19,906 40.3% 0 0.0% 49,380
County Total for 2022-11-08:   219,918
2020-11-03 CA14Jackie Speier* (D) 238,630 79.0% Ran Petel (R) 63,526 21.0% 0 0.0% 302,156
2020-11-03 CA18Anna Eshoo* (D) 41,710 69.6% Rishi Kumar (D) 18,257 30.4% 0 0.0% 59,967
County Total for 2020-11-03:   362,123
2018-11-06 CA14Jackie Speier* (D) 179,752 78.6% Cristina Osmena (R) 48,952 21.4% 0 0.0% 228,704
2018-11-06 CA18Anna Eshoo* (D) 41,396 77.2% Christine Russell (R) 12,226 22.8% 0 0.0% 53,622
County Total for 2018-11-06:   282,326
2016-11-08 CA14Jackie Speier* (D) 197,336 80.4% Angel Cardenas (R) 48,115 19.6% 0 0.0% 245,451
2016-11-08 CA18Anna Eshoo* (D) 42,100 74.1% Richard Fox (R) 14,685 25.9% 0 0.0% 56,785
County Total for 2016-11-08:   302,236
2014-11-04 CA14Jackie Speier* (D) 95,284 76.1% Robin Chew (R) 29,844 23.9% 0 0.0% 125,128
2014-11-04 CA18Anna Eshoo* (D) 23,596 70.1% Richard Fox (R) 10,080 29.9% 0 0.0% 33,676
County Total for 2014-11-04:   158,804
2012-11-06 CA14Jackie Speier* (D) 175,353 78.4% Debbie Bacigalupi (R) 48,379 21.6% 0 0.0% 223,732
2012-11-06 CA18Anna Eshoo* (D) 38,938 72.7% Dave Chapman (R) 14,631 27.3% 0 0.0% 53,569
County Total for 2012-11-06:   277,301
2010-11-02 CA12Jackie Speier* (D) 114,003 74.2% Mike Moloney (R) 36,180 23.6% 3,403 2.2% 153,586
2010-11-02 CA14Anna Eshoo* (D) 45,214 71.6% Dave Chapman (R) 16,214 25.7% 1,733 2.7% 63,161
County Total for 2010-11-02:   216,747
2008-11-04 CA12Jackie Speier* (D) 153,174 74.4% Greg Conlon (R) 40,874 19.9% 11,827 5.7% 205,875
2008-11-04 CA14Anna Eshoo* (D) 58,441 72.8% Ronny Santana (R) 16,605 20.7% 5,250 6.5% 80,296
County Total for 2008-11-04:   286,171
2008-04-08 sp CA12Jackie Speier (D) 52,469 79.6% Greg Conlon (R) 6,531 9.9% 6,956 10.5% 65,956
County Total for 2008-04-08:   65,956
2006-11-07 CA12Tom Lantos* (D) 103,391 74.2% Mike Moloney (R) 35,899 25.8% 0 0.0% 139,290
2006-11-07 CA14Anna Eshoo* (D) 42,353 72.8% Rob Smith (R) 13,365 23.0% 2,481 4.3% 58,199
County Total for 2006-11-07:   197,489
2004-11-02 CA12Tom Lantos* (D) 129,580 67.3% Mike Garza (R) 43,679 22.7% 19,173 10.0% 192,432
2004-11-02 CA14Anna Eshoo* (D) 56,605 72.6% Chris Haugen (R) 19,043 24.4% 2,295 2.9% 77,943
County Total for 2004-11-02:   270,375
2002-11-05 CA12Tom Lantos* (D) 76,994 66.1% Mike Moloney (R) 31,143 26.7% 8,380 7.2% 116,517
2002-11-05 CA14Anna Eshoo* (D) 34,560 71.1% Joe Nixon (R) 12,554 25.8% 1,477 3.0% 48,591
County Total for 2002-11-05:   165,108
2000-11-07 CA12Tom Lantos* (D) 112,548 73.1% Mike Garza (R) 34,631 22.5% 6,871 4.5% 154,050
2000-11-07 CA14Anna Eshoo* (D) 66,446 70.6% Bill Quraishi (R) 24,044 25.5% 3,630 3.9% 94,120
County Total for 2000-11-07:   248,170
1998-11-03 CA12Tom Lantos* (D) 88,709 71.7% Bob Evans (R) 28,410 22.9% 6,679 5.4% 123,798
1998-11-03 CA14Anna Eshoo* (D) 53,650 69.7% Chris Haugen (R) 21,156 27.5% 2,220 2.9% 77,026
County Total for 1998-11-03:   200,824
1996-11-05 CA12Tom Lantos* (D) 105,901 70.6% Storm Jenkins (R) 37,334 24.9% 6,681 4.5% 149,916
1996-11-05 CA14Anna Eshoo* (D) 61,603 66.3% Ben Brink (R) 27,808 29.9% 3,442 3.7% 92,853
County Total for 1996-11-05:   242,769
1994-11-08 CA12Tom Lantos* (D) 82,821 65.7% Deborah Wilder (R) 43,163 34.3% 0 0.0% 125,984
1994-11-08 CA14Anna Eshoo* (D) 49,570 61.9% Ben Brink (R) 30,492 38.1% 0 0.0% 80,062
County Total for 1994-11-08:   206,046
1992-11-03 CA12Tom Lantos* (D) 113,233 68.5% Jim Tomlin (R) 41,322 25.0% 10,633 6.4% 165,188
1992-11-03 CA14Anna Eshoo (D) 58,457 57.8% Tom Huening (R) 38,693 38.2% 4,028 4.0% 101,178
County Total for 1992-11-03:   266,366
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for San Mateo County, CA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2022 432,734 60,113 13.9% 243,202 56.2% 129,419 29.9% Dem +183,089 Dem +42.3% 75%
2020 442,988 64,016 14.5% 242,349 54.7% 136,623 30.8% Dem +178,333 Dem +40.3% 76%
2018 399,351 60,784 15.2% 200,913 50.3% 137,654 34.5% Dem +140,129 Dem +35.1% 69%
2016 395,928 67,049 16.9% 205,280 51.8% 123,599 31.2% Dem +138,231 Dem +34.9% 69%
2014 355,598 66,325 18.7% 180,459 50.7% 108,814 30.6% Dem +114,134 Dem +32.1% 63%
2012 361,486 70,346 19.5% 185,331 51.3% 105,809 29.3% Dem +114,985 Dem +31.8% 64%
2010 346,516 71,936 20.8% 179,392 51.8% 95,188 27.5% Dem +107,456 Dem +31.0% 62%
2008 389,718 83,411 21.4% 199,569 51.2% 106,738 27.4% Dem +116,158 Dem +29.8% 70%
2006 350,427 85,707 24.5% 173,182 49.4% 91,538 26.1% Dem +87,475 Dem +25.0% 63%
2004 368,410 94,418 25.6% 180,702 49.0% 93,290 25.3% Dem +86,284 Dem +23.4% 67%
2002 329,042 88,862 27.0% 165,593 50.3% 74,587 22.7% Dem +76,731 Dem +23.3% 60%
2000 338,608 93,201 27.5% 171,740 50.7% 73,667 21.8% Dem +78,539 Dem +23.2% 62%
1998 336,746 99,180 29.5% 174,279 51.8% 63,287 18.8% Dem +75,099 Dem +22.3% 63%
1996 355,082 107,088 30.2% 184,444 51.9% 63,550 17.9% Dem +77,356 Dem +21.8% 67%
1994 340,661 107,345 31.5% 179,734 52.8% 53,582 15.7% Dem +72,389 Dem +21.2% 65%
1992 347,694 111,328 32.0% 182,432 52.5% 53,934 15.5% Dem +71,104 Dem +20.5% 67%
1990 324,483 111,135 34.2% 170,163 52.4% 43,185 13.3% Dem +59,028 Dem +18.2% 64%
1986 310,127 108,056 34.8% 163,417 52.7% 38,654 12.5% Dem +55,361 Dem +17.9% 64%
VAPOP% is the estimated percentage of voting age population that is registered.
Registration data may include "inactive" voters.   Data for each year pertains to the November elections.