# California's 20th congressional district

California's 20th congressional district is a congressional district in California including much of the southern and southeastern part of the state's Central Valley. The district is currently represented by Republican Vince Fong. Fong was elected in a special election on May 21, 2024, after Kevin McCarthy resigned from Congress following the motion to vacate that ousted him from the office of House Speaker.
Redistricting in 2022 returned the district to the San Joaquin Valley. The new 20th district includes parts of Kern, Tulare, Kings, and Fresno counties. It includes the southern Sierra Nevada and western Mojave Desert, with three "fingers" extending west into the valley. Cities in the district include Clovis, Tehachapi, Ridgecrest, Taft, Lemoore, the west and northeast sides of Bakersfield, the south side of Visalia, the northeast side of Tulare, the north side of Hanford, and a sliver of northeastern Fresno including California State University, Fresno. The new 20th district is the most Republican district in California, with a Cook Partisan Voting Index rating of R+16.
Before 2022, it encompassed much of the Central Coast region. The district included Monterey and San Benito counties, most of Santa Cruz County, and portions of Santa Clara County.
Before redistricting in 2011, the 20th district was located in the San Joaquin Valley. It covered Kings County and portions of Fresno and Kern counties, including most of the city of Fresno. That area is now largely divided between the 21st and 16th districts, while most of the current 20th was within the former 17th.

## Recent election results from statewide races

| Year | Office | Results |
| 2008 | President | McCain 65% - 35% |
| 2010 | Governor | Whitman 64% - 30% |
| 2010 | Lt. Governor | Maldonado 65% - 23% |
| 2010 | Secretary of State | Dunn 63% - 29% |
| 2010 | Attorney General | Cooley 70% - 22% |
| 2010 | Treasurer | Walters 59% - 34% |
| 2010 | Controller | Strickland 58% - 34% |
| 2012 | President | Romney 67% - 33% |
| 2014 | Governor | Kashkari 68% - 32% |
| 2016 | President | Trump 63% - 32% |
| 2018 | Governor | Cox 66% - 34% |
| 2018 | Attorney General | Bailey 66% - 34% |
| 2020 | President | Trump 61% - 36% |
| 2022 | Senate (Reg.) | Meuser 68% - 32% |
| 2022 | Governor | Dahle 70% - 30% |
| 2022 | Lt. Governor | Underwood Jacobs 68% - 32% |
| 2022 | Secretary of State | Bernosky 68% - 32% |
| 2022 | Attorney General | Hochman 69% - 31% |
| 2022 | Treasurer | Guerrero 68% - 32% |
| 2022 | Controller | Chen 71% - 29% |
| 2024 | President | Trump 64% - 34% |
| 2024 | Senate (Reg.) | Garvey 66% - 34% |

## Composition

| FIPS County Code | County | Seat | Population |
| 19 | Fresno | Fresno | 1,017,162 |
| 29 | Kern | Bakersfield | 913,820 |
| 31 | Kings | Hanford | 152,682 |
| 107 | Tulare | Visalia | 479,468 |

### Cities and CDPs with 10,000 or more people

* Fresno – 542,107
* Bakersfield – 403,455
* Visalia – 141,384
* Clovis – 120,124
* Tulare – 68,875
* Hanford – 57,990
* Oildale – 36,135
* Ridgecrest – 27,959
* Lemoore – 27,038
* Rosamond – 20,961
* Lakeside – 20,648
* Rosedale – 18,639
* Tehachapi – 10,881

### 2,500 – 10,000 people

* Golden Hills – 9,578
* Taft – 8,546
* Lemoore Station – 6,568
* Bear Valley Springs – 5,592
* Greenacres – 5,496
* Mojave – 4,699
* Ford City – 4,348
* Tarpey Village – 3,997
* Lake Isabella – 3,573
* Yokuts Valley – 3,564
* Auberry – 3,238
* Stallion Springs – 3,139
* Weldon – 2,645
* Frazier Park – 2,592

## List of members representing the district

| Member | Party | Dates | Cong ress | Electoral history | Counties |
| District created March 4, 1933 ||||||
| George Burnham (San Diego) | Republican | March 4, 1933 – January 3, 1937 | 73rd 74th | Elected in 1932. Re-elected in 1934. Retired. | 1933–1943 Imperial, San Diego |
| Edouard Izac (San Diego) | Democratic | January 3, 1937 – January 3, 1943 | 75th 76th 77th | Elected in 1936. Re-elected in 1938. Re-elected in 1940. Redistricted to the 23rd district. | 1933–1943 Imperial, San Diego |
| John Carl Hinshaw (Pasadena) | Republican | January 3, 1943 – August 5, 1956 | 78th 79th 80th 81st 82nd 83rd 84th | Redistricted from the 11th district and re-elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Died. | 1943–1975 Los Angeles |
| Vacant | Vacant | August 5, 1956 – January 3, 1957 | 84th | | 1943–1975 Los Angeles |
| H. Allen Smith (Glendale) | Republican | January 3, 1957 – January 3, 1973 | 85th 86th 87th 88th 89th 90th 91st 92nd | 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. Retired. | 1943–1975 Los Angeles |
| Carlos Moorhead (Los Angeles) | Republican | January 3, 1973 – January 3, 1975 | 93rd | Elected in 1972. Redistricted to the 22nd district. | 1943–1975 Los Angeles |
| Barry Goldwater Jr. (Los Angeles) | Republican | January 3, 1975 – January 3, 1983 | 94th 95th 96th 97th | Redistricted from the 27th district and re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Retired to run for U.S. senator. | 1975–1983 Southwestern Los Angeles, eastern Ventura |
| Bill Thomas (Bakersfield) | Republican | January 3, 1983 – January 3, 1993 | 98th 99th 100th 101st 102nd | Redistricted from the 18th district and re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Redistricted to the 21st district. | 1983–1993 Inyo, Kern, Los Angeles (Lancaster), San Luis Obispo |
| Cal Dooley (Fresno) | Democratic | January 3, 1993 – January 3, 2005 | 103rd 104th 105th 106th 107th 108th | Redistricted from the 17th district and re-elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Retired. | 1993–2003 Western Fresno, northwestern Kern, Kings, western Tulare |
| Cal Dooley (Fresno) | Democratic | January 3, 1993 – January 3, 2005 | 103rd 104th 105th 106th 107th 108th | Redistricted from the 17th district and re-elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Retired. | 2003–2013 Western Fresno, northwestern Kern, Kings |
| Jim Costa (Fresno) | Democratic | January 3, 2005 – January 3, 2013 | 109th 110th 111th 112th | Elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Redistricted to the 16th district. | 2003–2013 Western Fresno, northwestern Kern, Kings |
| Sam Farr (Carmel) | Democratic | January 3, 2013 – January 3, 2017 | 113th 114th | Redistricted from the 17th district and re-elected in 2012. Re-elected in 2014. Retired. | 2013–2023 Monterey and San Benito, and portions of Santa Clara and Santa Cruz |
| Jimmy Panetta (Carmel Valley) | Democratic | January 3, 2017 – January 3, 2023 | 115th 116th 117th | Elected in 2016. Re-elected in 2018. Re-elected in 2020. Redistricted to the 19th district. | 2013–2023 Monterey and San Benito, and portions of Santa Clara and Santa Cruz |
| Kevin McCarthy (Bakersfield) | Republican | January 3, 2023 – December 31, 2023 | 118th | Redistricted from the 23rd district and re-elected in 2022. Resigned. | 2023–present Parts of the southern San Joaquin Valley, the Tehachapi Mountains and southern Sierra Nevada, and the northwestern Mojave Desert |
| Vacant | Vacant | December 31, 2023 – June 3, 2024 | 118th | | 2023–present Parts of the southern San Joaquin Valley, the Tehachapi Mountains and southern Sierra Nevada, and the northwestern Mojave Desert |
| Vince Fong (Bakersfield) | Republican | June 3, 2024 – present | 118th 119th | Elected to finish McCarthy's term. Re-elected in 2024. | 2023–present Parts of the southern San Joaquin Valley, the Tehachapi Mountains and southern Sierra Nevada, and the northwestern Mojave Desert |

## Election results
### 1932

1932 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | George Burnham | 43,757 | 50.3 |
| | Democratic | Claude Chandler | 43,304 | 49.7 |
| Total votes | Total votes | Total votes | 87,061 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1934

1934 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | George Burnham (Incumbent) | 51,682 | 52.4 |
| | Democratic | Edouard Izac | 46,957 | 47.6 |
| Total votes | Total votes | Total votes | 98,639 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1936

1936 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edouard Izac | 59,208 | 56.4 |
| | Republican | Ed P. Simple | 44,925 | 42.8 |
| | Communist | Esco L. Richardson | 916 | 0.8 |
| Total votes | Total votes | Total votes | 105,049 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1938

1938 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edouard Izac (Incumbent) | 65,243 | 60.4 |
| | Republican | John L. Bacon | 42,710 | 39.6 |
| Total votes | Total votes | Total votes | 107,953 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1940

1940 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edouard Izac (Incumbent) | 69,874 | 51.1 |
| | Republican | John L. Bacon | 66,132 | 48.3 |
| | Communist | Esco L. Richardson | 806 | 0.6 |
| Total votes | Total votes | Total votes | 136,812 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1942

1942 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw | 62,628 | 48.4 |
| | Democratic | Joseph O. Donovan | 55,479 | 42.9 |
| | Prohibition | Virgil G. Hinshaw | 6,864 | 5.3 |
| | Townsend | Janie Bele McCarty | 3,537 | 2.7 |
| | Communist | Orla E. Lair | 792 | 0.6 |
| Total votes | Total votes | Total votes | 129,300 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1944

1944 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 112,663 | 51.8 |
| | Democratic | Archibald B. Young | 101,090 | 46.5 |
| | Prohibition | Charles Hiram Randall | 3,615 | 1.5 |
| Total votes | Total votes | Total votes | 217,368 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1946

1946 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 98,283 | 63.2 |
| | Democratic | Everett G. Burkhalter | 67,317 | 36.8 |
| Total votes | Total votes | Total votes | 165,600 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1948

1948 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 204,710 | 81.6 |
| | Democratic | William B. Esterman | 46,232 | 18.4 |
| Total votes | Total votes | Total votes | 250,942 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1950

1950 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 211,012 | 85.1 |
| | Progressive | Myra Tanner Weiss | 26,508 | 10.7 |
| | Prohibition | Frank Nelson | 10,339 | 4.2 |
| Total votes | Total votes | Total votes | 247,859 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1952

1952 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 109,509 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1954

1954 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | John Carl Hinshaw (Incumbent) | 71,213 | 71.2 |
| | Democratic | Eugene Radding | 28,838 | 28.8 |
| Total votes | Total votes | Total votes | 100,051 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1956

1956 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith | 85,459 | 70.8 |
| | Democratic | Eugene Radding | 35,249 | 29.2 |
| Total votes | Total votes | Total votes | 120,708 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1958

1958 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 72,311 | 66 |
| | Democratic | Eugene Radding | 37,331 | 34 |
| Total votes | Total votes | Total votes | 109,642 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1960

1960 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 90,214 | 70.1 |
| | Democratic | Eugene Radding | 38,497 | 29.9 |
| Total votes | Total votes | Total votes | 128,711 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1962

1962 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 119,938 | 70.6 |
| | Democratic | Leon Mayer | 49,850 | 29.4 |
| Total votes | Total votes | Total votes | 169,788 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1964

1964 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 132,402 | 67.9 |
| | Democratic | C. Bernard Kaufman | 62,645 | 32.1 |
| Total votes | Total votes | Total votes | 195,047 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1966

1966 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 128,896 | 73.4 |
| | Democratic | Raymond Freschi | 46,730 | 26.6 |
| Total votes | Total votes | Total votes | 175,626 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1968

1968 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 133,148 | 69.3 |
| | Democratic | Don White | 56,008 | 29.2 |
| | Peace and Freedom | Robert J. Clarke | 2,965 | 1.5 |
| Total votes | Total votes | Total votes | 192,121 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1970

1970 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | H. Allen Smith (Incumbent) | 116,437 | 69.1 |
| | Democratic | Michael M. Stolzberg | 50,033 | 29.7 |
| | American Independent | Earl C. Harper | 2,100 | 1.2 |
| Total votes | Total votes | Total votes | 168,570 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1972

1972 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Carlos Moorhead | 120,299 | 57.4 |
| | Democratic | John Binkley | 89,219 | 42.6 |
| Total votes | Total votes | Total votes | 209,518 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1974

1974 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Barry Goldwater Jr. | 96,324 | 61.2 |
| | Democratic | Arline M. Mathews | 61,119 | 38.8 |
| Total votes | Total votes | Total votes | 157,443 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1976

1976 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Barry Goldwater Jr. (Incumbent) | 146,158 | 67.2 |
| | Democratic | Patty Lear Corman | 71,193 | 32.8 |
| Total votes | Total votes | Total votes | 217,351 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1978

1978 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Barry Goldwater Jr. (Incumbent) | 129,714 | 66.4 |
| | Democratic | Pat Lear | 65,695 | 33.6 |
| Total votes | Total votes | Total votes | 195,409 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1980

1980 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Barry Goldwater Jr. (Incumbent) | 199,674 | 78.8 |
| | Democratic | Matt Miller | 43,024 | 17.0 |
| | Libertarian | Christopher R. Darwin | 10,605 | 4.2 |
| Total votes | Total votes | Total votes | 253,303 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1982

1982 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Bill Thomas | 123,312 | 68.1 |
| | Democratic | Robert J. Bethea | 57,769 | 31.9 |
| Total votes | Total votes | Total votes | 181,081 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1984

1984 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Bill Thomas (Incumbent) | 151,732 | 70.9 |
| | Democratic | Michael T. LeSage | 62,307 | 29.1 |
| Total votes | Total votes | Total votes | 214,039 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1986

1986 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Bill Thomas (Incumbent) | 129,989 | 72.6 |
| | Democratic | Jules H. Moquin | 49,027 | 27.4 |
| Total votes | Total votes | Total votes | 179,016 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1988

1988 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Bill Thomas (Incumbent) | 162,779 | 71.1 |
| | Democratic | Lita Reid | 62,037 | 27.1 |
| | Libertarian | David L. Bersohn | 4,190 | 1.8 |
| Total votes | Total votes | Total votes | 229,006 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1990

1990 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Bill Thomas (Incumbent) | 112,962 | 59.8 |
| | Democratic | Michael A. Thomas | 65,101 | 34.5 |
| | Libertarian | William Howard Dilbeck | 10,555 | 5.6 |
| | No party | Reid (write-in) | 307 | 0.2 |
| Total votes | Total votes | Total votes | 188,925 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1992

1992 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley | 72,679 | 64.9 |
| | Republican | Ed Hunt | 39,388 | 35.1 |
| Total votes | Total votes | Total votes | 112,067 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1994

1994 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley (Incumbent) | 57,394 | 56.70 |
| | Republican | Paul Young | 43,836 | 43.30 |
| Total votes | Total votes | Total votes | 101,230 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1996

1996 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley (Incumbent) | 65,381 | 56.6 |
| | Republican | Trice Harvey | 45,276 | 39.1 |
| | Libertarian | Jonathan Richter | 5,048 | 4.3 |
| Total votes | Total votes | Total votes | 115,705 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1998

1998 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley (Incumbent) | 60,599 | 60.73 |
| | Republican | Cliff Unruh | 39,183 | 39.27 |
| Total votes | Total votes | Total votes | 99,782 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2000

2000 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley (Incumbent) | 66,235 | 52.4 |
| | Republican | Rich Rodriguez | 57,563 | 45.5 |
| | Natural Law | Walter Kenneth Ruehlig | 1,416 | 1.1 |
| | Libertarian | Arnold Kriegbaum | 1,320 | 1.0 |
| Total votes | Total votes | Total votes | 126,534 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2002

2002 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cal Dooley (Incumbent) | 47,627 | 63.7 |
| | Republican | Andre Minuth | 25,628 | 34.3 |
| | Libertarian | Varrin Swearingen | 1,515 | 2.0 |
| Turnout | Turnout | Turnout | 74,770 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2004

2004 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa | 61,005 | 53.5 |
| | Republican | Roy Ashburn | 53,231 | 46.5 |
| Total votes | Total votes | Total votes | 114,236 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2006

2006 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa (Incumbent) | 61,120 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2008

2008 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa (Incumbent) | 93,023 | 74.33 |
| | Republican | Jim Lopez | 32,118 | 25.67 |
| Total votes | Total votes | Total votes | 125,141 | 100.0 |
| Turnout | Turnout | Turnout | | 60.55 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2010

2010 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa (Incumbent) | 46,247 | 51.71 |
| | Republican | Andy Vidak | 43,197 | 48.29 |
| Total votes | Total votes | Total votes | 89,444 | 100.00 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2012

2012 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sam Farr (Incumbent) | 172,996 | 74.1 |
| | Republican | Jeff Taylor | 60,566 | 25.9 |
| Total votes | Total votes | Total votes | 233,562 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2014

2014 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sam Farr (Incumbent) | 106,034 | 75.2 |
| | Republican | Ronald Paul Kabat | 35,010 | 24.8 |
| Total votes | Total votes | Total votes | 141,044 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2016

2016 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jimmy Panetta | 180,980 | 70.8 |
| | Republican | Casey Lucius | 74,811 | 29.2 |
| Total votes | Total votes | Total votes | 255,791 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2018

2018 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jimmy Panetta (Incumbent) | 183,677 | 81.4 |
| | No party preference | Ronald Paul Kabat | 42,044 | 18.6 |
| Total votes | Total votes | Total votes | 225,721 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

2020 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jimmy Panetta (incumbent) | 236,896 | 76.8 |
| | Republican | Jeff Gorman | 71,658 | 23.2 |
| Total votes | Total votes | Total votes | 308,554 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2022

2022 United States House of Representatives elections in California, 20th district :
| Party | Party | Candidate | Votes | % |
| | Republican | Kevin McCarthy (incumbent) | 153,847 | 67.2 |
| | Democratic | Marisa Wood | 74,934 | 32.8 |
| Total votes | Total votes | Total votes | 228,781 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 2024 (special)

2024 California's 20th congressional district special election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Vince Fong | 50.442 | 60.6% | N/A |
| | Republican | Mike Boudreaux | 32,777 | 39.4% | N/A |
| Total votes | Total votes | Total votes | 68,134 | 100.0% | |
| | Republican hold | Republican hold | Republican hold | Republican hold | Republican hold |