# 2012 United States Senate election in California

Elections in California :
Federal governmentU.S. President
1852
1856
1860
1864
1868
1872
1876
1880
1884
1888
1892
1896
1900
1904
1908
1912
1916
1920
1924
1928
1932
1936
1940
1944
1948
1952
1956
1960
1964
1968
1972
1976
1980
1984
1988
1992
1996
Dem
Rep
2000
Dem
Rep
2004
Dem
Rep
2008
Dem
Rep
2012
Dem
Rep
2016
Dem
Rep
2020
Dem
Rep
2024
Dem
Rep
U.S. Senate
1849
1850
1852 sp
1856
1857 sp
1860
1860 sp
1868
1872
1873
1873 sp
1878
1880
1885
1886 sp
1887
1891
1891 sp
1893
1895 sp
1897
1900 sp
1903
1905
1909
1911
1914
1916
1920
1922
1926
1928
1932
1934
1938
1940
1944
1946
1946 sp
1950
1952
1954 sp
1956
1958
1962
1964
1968
1970
1974
1976
1980
1982
1986
1988
1992
1992 sp
1994
1998
2000
2004
2006
2010
2012
2016
2018
2022
2022 sp
2024
2024 sp
2028
2030
U.S. House of Representatives
1849
1851
1852
1854
1856
1859
1861
1863
1864
1867
1868
1871
1872
1875
1876
1879
1880
1882
1884
1886
1888
1890
1892
1894
1896
1898
1900
1902
1904
1906
1908
1910
1912
1914
1916
1918
1920
1922
1924
1926
1928
1930
1932
1934
1936
1938
1940
1942
1944
1946
12th
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1987
5th sp
1988
1990
1992
1994
1996
1998
2000
2001
32nd sp
2002
2004
2005
5th sp
48th sp
2006
50th sp
2007
36th sp
2008
12th sp
2009
10th sp
32nd sp
2010
2011
36th sp
2012
2014
2016
2017
34th sp
2018
2020
25th sp
2022
22nd sp
2024
16th
20th sp
30th
45th
47th
2026 :
State governmentExecutive Governor
1849
1851
1853
1855
1857
1859
1861
1863
1867
1871
1875
1879
1882
1886
1890
1894
1898
1902
1906
1910
1914
1918
1922
1926
1930
1934
1938
1942
1946
1950
1954
1958
1962
1966
1970
1974
1978
1982
1986
1990
1994
1998
2002
2003 (recall)
2006
2010
2014
2018
2021 (recall)
2022
2026
Lieutenant governor
1950
1954
1958
1962
1966
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
2026
Attorney general
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
2026
Secretary of state
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
Treasurer
1994
1998
2002
2006
2010
2014
2018
2022
2026
Controller
1994
1998
2002
2006
2010
2014
2018
2022
Insurance commissioner
1994
1998
2002
2006
2010
2014
2018
2022
Superintendent
1994
1998
2002
2006
2010
2014
2018
2022
Board of equalization
2018
2022
Legislature Senate
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
Special
Assembly
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2021 (79th sp)
2022 (17th sp)
2024
Special
Judiciary Court of appeals
1994
1998
2002
2006
Elections by year
1992
1994
1996
1998
2000
2002
2004
2005
2006
2008
Feb
Jun
Nov
2009
2010
Jun
Nov
2012
Jun
Nov
2014
2016
2018
2020
2022
2024 :
State propositions1910–1919
1911
4
7
8
1960–1969
1964
14
1970–1979
1978
6
8
13
1980–1989
1982
8
1986
64
65
1988
98
99
1990–1999
1994
187
1996
196
209
215
218
1998
6
10
227
2000–2009
2000
21
22
36
39
2003
53
54
2004
1A
55
56
57
58
59
60
60A
61
62
63
64
65
66
69
71
2005
73
74
75
76
77
78
79
80
2006
81
82
83
85
87
89
90
2008
91
92
93
94, 95, 96, and 97
98 and 99
1A
2
3
4
5
6
7
8
9
10
11
12
2009
1A
1B
1C
1D
1E
1F
2010–2019
2010
13
14
15
16
17
19
20
21
22
23
24
25
26
27
2012
29
30
32
34
37
38
39
2014
1
2
41
42
45
46
47
48
2016
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
2018
68
69
70
71
72
6
7
8
9
10
11
12
2020–2029
2020
13
14
15
16
17
18
19
20
21
22
23
24
25
2022
1
26
27
28
29
30
31
2024
1
2
3
4
5
6
32
33
34
35
36
Full list :
Los Angeles CountyLos Angeles County Board of supervisors
1980
1996
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
Ballot measures
1980
A
2008
R
2012
B
J
2016
M
Elections
2020
2022
2024
Los Angeles Mayor
1896
1898
1900
1902
1904
1906
1909 (sp)
1909
1911
1913
1915
1917
1919
1921
1923
1925
1929
1933
1937
1938
1941
1945
1949
1953
1957
1961
1965
1969
1973
1977
1981
1985
1989
1993
1997
2001
2005
2009
2013
2017
2022
2026
City attorney
2009
Ballot measures
1986
U
2017
S
Elections
2009
2011
2013
2015
2017
2019 (sp)
2020
2022
2023 (sp)
2024
Long Beach Mayor
1994
1998
2002
2006
2010
2014
2018
2022 :
Orange CountyOrange County Board of supervisors
2018
2020
2022
2024
District attorney
2018
Anaheim Mayor
2002
2006
2010
2014
2018
2022
Irvine Mayor
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
Costa Mesa Municipal
1947
1953
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024 :
SacramentoMayor
2000
2004
2008
2012
2016
2020
2024 :
San Diego CountySan Diego County Board of supervisors
2020
San Diego Mayor
1887
1889
1891
1893
1895
1897
1899
1901
1903
1905
1907
1909
1911
1913
1915
1917
1919
1921
1923
1925
1927
1929
1931
1932
1935
1939
1943
1947
1951
1955
1959
1963
1967
1971
1975
1979
1983 (sp)
1984
1986 (sp)
1988
1992
1996
2000
2004
2005 (sp)
2008
2012
2013–14 (sp)
2016
2020
2024
2028
City attorney
2004
2008
2012
2016
2020
City council
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
Special :
San FranciscoMayor
1901
1903
1905
1907
1909
1911
1931
1935
1939
1943
1947
1951
1955
1959
1963
1967
1971
1975
1979
1983 (recall)
1983
1987
1991
1995
1999
2003
2007
2011
2015
2018 (sp)
2019
2024
District attorney
2019
2022 (recall)
2022 (sp)
2024
Board of supervisors
1977
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
Board of education
2018
2022 (recall)
Ballot measures
2024
G
Elections
2004
Mar
Nov
2005
2006
Jun
Nov
2007
2008
Feb
Jun
Nov
2009
2010
Jun
Nov
2011
2012
Jun
Nov
2013
2022
Feb :
San JoseMayor
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
2024 :
Other localities
Bakersfield
Mayoral elections:
2004
2008
2012
2016
2020
2024
Fresno
Mayoral elections:
1996
2000
2004
2008
2012
2016
2020
2024
Oakland
Mayoral elections:
1994
1998
2002
2006
2010
2014
2018
2022
2024
2025
Riverside
Mayoral elections:
1997
2001
2005
2009
2012
2016
2020
2024
San Bernardino
Mayoral elections:
2005
2009
2014
2018
2022
Stockton
Mayoral elections:
2008
2012
2016
2020
2024 :
vte :
The 2012 United States Senate election in California took place on November 6, 2012, concurrently with the 2012 U.S. presidential election as well as other elections to the United States Senate and House of Representatives and various state and local elections.
The primary election on June 5 took place under California's new blanket primary law, where all candidates appear on the same ballot, regardless of party. In the primary, voters voted for any candidate listed, or write-in any other candidate. The top two finishers—regardless of party—advanced to the general election in November, even if a candidate managed to receive a majority of the votes cast in the June primary. In the primary, less than 15% of the total 2010 census population voted. Incumbent Democratic U.S. Senator Dianne Feinstein announced her intention to run for a fourth full term in April 2011 and finished first in the blanket primary with 49.5% of the vote. The second-place finisher was Republican candidate and autism activist Elizabeth Emken, who won 12.7% of the vote.
Feinstein ultimately defeated Emken in the general election on November 6, winning 62.5% of the vote to Emken's 37.5%. Feinstein's total of 7.86 million popular votes was the most ever received by a candidate for U.S. Senate in American history until Adam Schiff won the same seat with over 9 million votes in 2024. For a full decade, Emken was the only Republican candidate to have advanced to a general U.S. Senate election in California, as only Democratic candidates advanced to the general election in 2016 and 2018; however, this streak was broken 10 years later in 2022.

## Primary
### Candidates
#### Democratic Party

* Dianne Feinstein, incumbent U.S. senator
* Colleen Shea Fernald
* David Levitt, computer scientist and engineer
* Nak Shah, environmental health consultant
* Diane Stewart, businesswoman
* Mike Strimling, attorney and former U.S. Peace Corps legal adviser

#### Republican Party

* John Boruff, businessman
* Oscar Alejandro Braun, businessman and rancher
* Greg Conlon, businessman and CPA
* Elizabeth Emken, candidate for the 11th congressional district in 2010
* Rogelio Gloria, U.S. Naval Officer
* Dan Hughes, businessman
* Dennis Jackson
* Dirk Konopik, former congressional aide
* Donald Krampe
* Robert Lauten
* Al Ramirez, businessman
* Nachum Shifren, rabbi and state senate candidate in 2010
* Orly Taitz, dentist, Birther movement activist and candidate for California Secretary of State in 2010
* Rick Williams, business attorney

#### Libertarian

* Gail Lightfoot, retired nurse

#### Peace and Freedom

* Kabiruddin Karim Ali, businessman
* Marsha Feinland, retired teacher

#### American Independent

* Don J. Grundmann, chiropractor
Despite Don J. Grundmann running, the American Independent Party gave their party endorsement to Republican Robert Lauten.

### Polling

Survey USA poll of 1,314 likely voters, March 29–April 2, 2012. MoE: ±2.8% :
| Party | Party | Candidate | % |
| | Democratic | Dianne Feinstein (incumbent) | 51 |
| | Republican | Dan Hughes | 2 |
| | Republican | Elizabeth Emken | 2 |
| | Democratic | Diane Stewart | 1 |
| | Republican | John Boruff | 1 |
| | Republican | Rick Williams | 1 |
| | Republican | Al Ramirez | 1 |
| | Republican | Robert Lauten | 1 |
| | Republican | Orly Taitz | 1 |
| | Libertarian | Gail Lightfoot | 1 |
| | Democratic | David Alex Levitt | 1 |
| | Republican | Greg Conlon | 1 |
| | Republican | Dennis Jackson | 1 |
| | Republican | Donald Krampe | 1 |
| | American Independent | Don J. Grundmann | 1 |
| | Republican | Oscar Alejandro Braun | 0 |
| | Republican | Dirk Allen Konopik | 0 |
| | Democratic | Mike Strimling | 0 |
| | Democratic | Nak Shah | 0 |
| | Democratic | Colleen Shea Fernald | 0 |
| | Peace and Freedom | Marsha Feinland | 0 |
| | Republican | Rogelio T. Gloria | 0 |
| | Peace and Freedom | Kabiruddin Karim Ali | 0 |
| | Republican | Nachum Shifren | 0 |
| | n/a | Undecided | 30 |
| Total votes | Total votes | Total votes | |
Survey USA poll of 1,232 likely voters, May 27–29, 2012. MoE: ±2.8% :
| Party | Party | Candidate | % |
| | Democratic | Dianne Feinstein (incumbent) | 42 |
| | Republican | Elizabeth Emken | 4 |
| | Republican | Dan Hughes | 4 |
| | Republican | Rick Williams | 3 |
| | Republican | Al Ramirez | 3 |
| | Republican | Donald Krampe | 2 |
| | Democratic | Diane Stewart | 2 |
| | Democratic | David Alex Levitt | 2 |
| | Libertarian | Gail Lightfoot | 2 |
| | Republican | Orly Taitz | 1 |
| | Republican | Greg Conlon | 1 |
| | Republican | Robert Lauten | 1 |
| | Republican | Nachum Shifren | 1 |
| | Republican | Dennis Jackson | 1 |
| | Republican | John Boruff | 1 |
| | Republican | Dirk Allen Konopik | 1 |
| | Democratic | Colleen Shea Fernald | 1 |
| | Democratic | Mike Strimling | 1 |
| | Peace and Freedom | Marsha Feinland | 1 |
| | American Independent | Don J. Grundmann | 1 |
| | Republican | Oscar Alejandro Braun | 0 |
| | Peace and Freedom | Kabiruddin Karim Ali | 0 |
| | Democratic | Nak Shah | 0 |
| | Republican | Rogelio T. Gloria | 0 |
| | n/a | Undecided | 24 |
| Total votes | Total votes | Total votes | |

### Results

United States Senate primary election in California, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Dianne Feinstein (incumbent) | 2,392,822 | 49.3% |
| | Republican | Elizabeth Emken | 613,613 | 12.6% |
| | Republican | Dan Hughes | 323,840 | 6.7% |
| | Republican | Rick Williams | 157,946 | 3.3% |
| | Republican | Orly Taitz | 154,781 | 3.2% |
| | Republican | Dennis Jackson | 137,120 | 2.8% |
| | Republican | Greg Conlon | 135,421 | 2.8% |
| | Republican | Al Ramirez | 109,399 | 2.3% |
| | Libertarian | Gail Lightfoot | 101,648 | 2.1% |
| | Democratic | Diane Stewart | 97,782 | 2.0% |
| | Democratic | Mike Strimling | 97,024 | 2.0% |
| | Democratic | David Levitt | 76,482 | 1.6% |
| | Republican | Oscar Braun | 75,842 | 1.6% |
| | Republican | Robert Lauten | 57,720 | 1.2% |
| | Peace and Freedom | Marsha Feinland | 54,129 | 1.2% |
| | Democratic | Colleen Shea Fernald | 51,623 | 1.1% |
| | Republican | Donald Krampe | 39,035 | 0.8% |
| | American Independent | Don J. Grundmann | 33,037 | 0.7% |
| | Republican | Dirk Allen Konopik | 29,997 | 0.6% |
| | Republican | John Boruff | 29,357 | 0.6% |
| | Democratic | Nak Shah | 27,203 | 0.6% |
| | Republican | Rogelio T. Gloria | 22,529 | 0.5% |
| | Republican | Nachum Shifren | 21,762 | 0.4% |
| | Peace and Freedom | Kabiruddin Karim Ali | 12,269 | 0.3% |
| | Republican | Linda R. Price (write-in) | 25 | 0.0% |
| Total votes | Total votes | Total votes | 4,852,406 | 100.0% |

### Election contest

In July 2012, Taitz sued to block the certification of the primary election results, alleging "rampant election fraud", but her suit was denied.

## General election
### Fundraising

| Candidate (party) | Receipts | Disbursements | Cash on hand | Debt |
| Dianne Feinstein (D) | $12,673,306 | $12,105,960 | $865,541 | $373,734 |
| Elizabeth Emken (R) | $1,114,350 | $1,110,209 | $4,140 | $4,479 |
| Source: Federal Election Commission |||||

#### Top contributors

| Dianne Feinstein | Contribution | Elizabeth Emken | Contribution |
| Pacific Gas and Electric Company | $120,700 | Thomas H. Lee Partners | $10,000 |
| JStreetPAC | $82,171 | DevicePharm, Inc. | $7,500 |
| General Atomics | $56,750 | Troy Group | $7,500 |
| Edison International | $54,250 | Jelly Belly | $5,500 |
| General Dynamics | $43,500 | Autism Advocate | $5,000 |
| BAE Systems | $40,000 | Geier Group | $5,000 |
| Diamond Foods | $31,599 | Generations Healthcare | $5,000 |
| Northrop Grumman | $30,800 | Gingery Development | $4,000 |
| International Alliance of Theatrical Stage Employees | $30,000 | MIR3, Inc. | $3,000 |
| Wells Fargo | $27,250 | Northrop Grumman | $2,800 |
| Source: OpenSecrets ||||

#### Top industries

| Dianne Feinstein | Contribution | Elizabeth Emken | Contribution |
| Lawyers/Law Firms | $565,129 | Retired | $63,849 |
| Retired | $463,058 | Republican/Conservative | $35,800 |
| Agribusiness | $367,132 | Financial Institutions | $26,100 |
| Real Estate | $334,321 | Real Estate | $19,200 |
| Lobbyists | $324,196 | Business Services | $16,000 |
| Financial Institutions | $321,744 | Misc Finance | $12,750 |
| Electric Utilities | $313,450 | Printing & Publishing | $8,000 |
| Entertainment Industry | $300,321 | Food & Beverage | $6,000 |
| Women's Issues | $207,449 | Petroleum Industry | $6,000 |
| High-Tech Industry | $205,789 | Lawyers/Law Firms | $5,458 |
| Source: OpenSecrets ||||

### Candidates

* Dianne Feinstein (D), incumbent U.S. Senator
* Elizabeth Emken (R), former Vice President of Autism Speaks

### Debates

No debates were scheduled. Senator Feinstein decided to focus on her own campaign rather than debate her challenger.

### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Solid D | November 1, 2012 |
| Sabato's Crystal Ball | Safe D | November 5, 2012 |
| Rothenberg Political Report | Safe D | November 2, 2012 |
| Real Clear Politics | Safe D | November 5, 2012 |

### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Dianne Feinstein (D) | Elizabeth Emken (R) | Other | Undecided |
| SurveyUSA | May 27–29, 2012 | 1,575 | ±2.5% | 50% | 34% | — | 15% |
| The Field Poll | June 21 – July 2, 2012 | 848 | ±3.5% | 51% | 32% | — | 17% |
| CBRT Pepperdine | July 30 – August 1, 2012 | 873 | ±3.3% | 46% | 34% | — | 21% |
| SurveyUSA | September 9–11, 2012 | 524 | ±4.2% | 55% | 37% | — | 9% |
| The Field Poll | September 6–18, 2012 | 902 | ±3.4% | 57% | 31% | — | 12% |
| SurveyUSA | October 7–9, 2012 | 539 | ±4.3% | 54% | 35% | — | 10% |
| Reason-Rupe | October 11–15, 2012 | 508 | ±5.1% | 60% | 34% | 2% | 5% |
| LA Times/USC | October 15–21, 2012 | 1,440 | ±n/a | 55% | 38% | 1% | 6% |
| The Field Poll | October 17–24, 2012 | 815 | ±3.6% | 56% | 32% | — | 12% |
| The Field Poll | October 25–30, 2012 | 751 | ±3.6% | 54% | 33% | — | 13% |

### Results

United States Senate election in California, 2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Dianne Feinstein (incumbent) | 7,864,624 | 62.52% | +3.09% |
| | Republican | Elizabeth Emken | 4,713,887 | 37.48% | +2.46% |
| Total votes | Total votes | Total votes | 12,578,511 | 100.00% | N/A |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

#### By county

| | Dianne Feinstein | Dianne Feinstein | Elizabeth Emken | Elizabeth Emken |
| County | Votes | % | Votes | % |
| Alameda | 468,456 | 81.9% | 103,313 | 18.1% |
| Alpine | 409 | 64.1% | 229 | 35.9% |
| Amador | 7,051 | 40.8% | 10,232 | 59.2% |
| Butte | 43,681 | 49.3% | 44,981 | 50.7% |
| Calaveras | 8,878 | 41.6% | 12,479 | 58.4% |
| Colusa | 2,482 | 43.3% | 3,253 | 56.7% |
| Contra Costa | 300,194 | 70.1% | 128,310 | 29.9% |
| Del Norte | 4,065 | 47.4% | 4,502 | 52.6% |
| El Dorado | 35,776 | 41.3% | 50,820 | 58.7% |
| Fresno | 129,267 | 51.1% | 123,499 | 48.9% |
| Glenn | 3,520 | 39.0% | 5,515 | 61.0% |
| Humboldt | 36,162 | 65.0% | 19,437 | 35.0% |
| Imperial | 25,342 | 67.2% | 12,346 | 32.8% |
| Inyo | 3,333 | 42.6% | 4,494 | 57.4% |
| Kern | 92,252 | 42.3% | 125,906 | 57.7% |
| Kings | 13,304 | 42.6% | 17,916 | 57.4% |
| Lake | 13,543 | 59.0% | 9,424 | 41.0% |
| Lassen | 3,150 | 29.9% | 7,390 | 70.1% |
| Los Angeles | 2,183,654 | 71.5% | 868,924 | 28.5% |
| Madera | 15,997 | 41.1% | 22,942 | 58.9% |
| Marin | 105,153 | 80.1% | 26,105 | 19.9% |
| Mariposa | 3,551 | 40.3% | 5,268 | 59.7% |
| Mendocino | 24,254 | 70.3% | 10,224 | 29.7% |
| Merced | 32,955 | 55.0% | 27,000 | 45.0% |
| Modoc | 1,188 | 30.1% | 2,761 | 69.9% |
| Mono | 2,600 | 52.0% | 2,404 | 48.0% |
| Monterey | 84,585 | 69.6% | 36,930 | 30.4% |
| Napa | 37,122 | 66.5% | 18,682 | 33.5% |
| Nevada | 25,495 | 50.4% | 25,078 | 49.6% |
| Orange | 515,902 | 47.5% | 570,574 | 52.5% |
| Placer | 68,599 | 41.4% | 97,139 | 58.6% |
| Plumas | 4,162 | 42.8% | 5,560 | 57.2% |
| Riverside | 327,698 | 51.9% | 303,651 | 48.1% |
| Sacramento | 302,078 | 60.7% | 195,412 | 39.3% |
| San Benito | 11,389 | 61.1% | 7,255 | 38.9% |
| San Bernardino | 298,067 | 54.0% | 253,433 | 46.0% |
| San Diego | 622,781 | 54.4% | 521,884 | 45.6% |
| San Francisco | 305,126 | 88.5% | 39,589 | 11.5% |
| San Joaquin | 113,706 | 57.0% | 85,787 | 43.0% |
| San Luis Obispo | 62,216 | 50.8% | 60,262 | 49.2% |
| San Mateo | 213,503 | 77.2% | 62,979 | 22.8% |
| Santa Barbara | 93,921 | 59.6% | 63,599 | 40.4% |
| Santa Clara | 454,647 | 72.9% | 168,722 | 27.1% |
| Santa Cruz | 91,109 | 78.2% | 25,463 | 21.8% |
| Shasta | 27,155 | 36.5% | 47,184 | 63.5% |
| Sierra | 677 | 38.6% | 1,078 | 61.4% |
| Siskiyou | 8,196 | 42.0% | 11,334 | 58.0% |
| Solano | 98,251 | 66.0% | 50,634 | 34.0% |
| Sonoma | 154,892 | 73.7% | 55,256 | 26.3% |
| Stanislaus | 78,470 | 51.8% | 73,060 | 48.2% |
| Sutter | 12,395 | 41.2% | 17,715 | 58.8% |
| Tehama | 8,349 | 37.0% | 14,241 | 63.0% |
| Trinity | 2,658 | 47.5% | 2,943 | 52.5% |
| Tulare | 42,395 | 42.9% | 56,499 | 57.1% |
| Tuolumne | 10,336 | 42.8% | 13,823 | 57.2% |
| Ventura | 171,483 | 54.4% | 143,603 | 45.6% |
| Yolo | 49,148 | 67.7% | 23,468 | 32.3% |
| Yuba | 7,896 | 41.0% | 11,376 | 59.0% |
| Totals | 7,864,624 | 62.52% | 4,713,887 | 37.48% |
* Republican — >15%
* Republican — +12.5−15%
* Republican — +10−12.5%
* Republican — +7.5−10%
* Republican — +5−7.5%
* Republican — +2.5−5%
* Republican — +0−2.5%
* Democratic — +0−2.5%
* Democratic — +2.5−5%
* Democratic — +5−7.5%
* Democratic — +7.5-10%

##### Counties that flipped from Democratic to Republican

* Butte (largest city: Chico)
* Del Norte (largest community: Crescent City)
* Trinity (largest community: Weaverville)

#### By congressional district

Feinstein won 41 of the 53 congressional districts, including three held by Republicans.
| District | Feinstein | Emken | Representative |
| 1st | 42% | 58% | Doug LaMalfa |
| 2nd | 73% | 27% | Jared Huffman |
| 3rd | 56% | 44% | John Garamendi |
| 4th | 41% | 59% | Tom McClintock |
| 5th | 72% | 28% | Mike Thompson |
| 6th | 71% | 29% | Doris Matsui |
| 7th | 53% | 47% | Ami Bera |
| 8th | 43% | 57% | Paul Cook |
| 9th | 60% | 40% | Jerry McNerney |
| 10th | 52% | 48% | Jeff Denham |
| 11th | 72% | 28% | George Miller |
| 12th | 89% | 11% | Nancy Pelosi |
| 13th | 91% | 9% | Barbara Lee |
| 14th | 79% | 21% | Jackie Speier |
| 15th | 71% | 29% | Eric Swalwell |
| 16th | 59% | 41% | Jim Costa |
| 17th | 75% | 25% | Mike Honda |
| 18th | 72% | 28% | Anna Eshoo |
| 19th | 74% | 26% | Zoe Lofgren |
| 20th | 73% | 27% | Sam Farr |
| 21st | 56% | 44% | David Valadao |
| 22nd | 43% | 57% | Devin Nunes |
| 23rd | 38% | 62% | Kevin McCarthy |
| 24th | 56% | 44% | Lois Capps |
| 25th | 49% | 51% | Buck McKeon |
| 26th | 56% | 44% | Julia Brownley |
| 27th | 65% | 35% | Judy Chu |
| 28th | 73% | 27% | Adam Schiff |
| 29th | 78% | 22% | Tony Cárdenas |
| 30th | 69% | 31% | Brad Sherman |
| 31st | 59% | 41% | Gary Miller |
| 32nd | 67% | 33% | Grace Napolitano |
| 33rd | 65% | 35% | Henry Waxman |
| 34th | 85% | 15% | Xavier Becerra |
| 35th | 68% | 32% | Gloria Negrete McLeod |
| 36th | 54% | 46% | Raul Ruiz |
| 37th | 86% | 14% | Karen Bass |
| 38th | 67% | 33% | Linda Sánchez |
| 39th | 49% | 51% | Ed Royce |
| 40th | 81% | 19% | Lucille Roybal-Allard |
| 41st | 63% | 37% | Mark Takano |
| 42nd | 43% | 57% | Ken Calvert |
| 43rd | 78% | 22% | Maxine Waters |
| 44th | 85% | 15% | Janice Hahn |
| 45th | 44% | 56% | John B. T. Campbell III |
| 46th | 63% | 37% | Loretta Sánchez |
| 47th | 61% | 39% | Alan Lowenthal |
| 48th | 45% | 55% | Dana Rohrabacher |
| 49th | 47% | 53% | Darrell Issa |
| 50th | 40% | 60% | Duncan Hunter |
| 51st | 70% | 30% | Juan Vargas |
| 52nd | 54% | 46% | Scott Peters |
| 53rd | 63% | 37% | Susan Davis |