# California's 31st congressional district

California's 31st congressional district is a congressional district in Los Angeles County, in the U.S. state of California. The district is located in the San Gabriel Valley and contains most of the Hispanic-majority areas in that region.
From January 3, 2023, following the 2020 redistricting cycle, the district is currently represented by Democrat Gil Cisneros.

## Recent election results from statewide races

| Year | Office | Results |
| 2008 | President | Obama 63% - 36% |
| 2010 | Governor | Brown 57% - 37% |
| 2010 | Lt. Governor | Newsom 51% - 36% |
| 2010 | Secretary of State | Bowen 56% - 35% |
| 2010 | Attorney General | Harris 47% - 45% |
| 2010 | Treasurer | Lockyer 60% - 32% |
| 2010 | Controller | Chiang 56% - 34% |
| 2012 | President | Obama 66% - 34% |
| 2014 | Governor | Brown 59% - 41% |
| 2016 | President | Clinton 66% - 29% |
| 2018 | Governor | Newsom 64% - 36% |
| 2018 | Attorney General | Becerra 67% - 33% |
| 2020 | President | Biden 64% - 33% |
| 2022 | Senate (Reg.) | Padilla 61% - 39% |
| 2022 | Governor | Newsom 58% - 42% |
| 2022 | Lt. Governor | Kounalakis 59% - 41% |
| 2022 | Secretary of State | Weber 59% - 41% |
| 2022 | Attorney General | Bonta 58% - 42% |
| 2022 | Treasurer | Ma 58% - 42% |
| 2022 | Controller | Cohen 56% - 44% |
| 2024 | President | Harris 57% - 40% |
| 2024 | Senate (Reg.) | Schiff 57% - 43% |

## Composition

| FIPS County Code | County | Seat | Population |
| 37 | Los Angeles | Los Angeles | 9,663,345 |
Under the 2020 redistricting, California's 31st congressional district is located in Southern California, taking up part of eastern Los Angeles County. It includes the cities of El Monte, West Covina, Baldwin Park, Azusa, San Dimas, La Verne, Duarte, South El Monte, Industry, La Puente, Bradbury, Irwindale, and Covina; the south sides of the cities of Glendora and Monrovia; and the census-designated places Avocado Heights, North El Monte, South San Jose Hills, West Puente Valley, Valinda, Mayflower Village, South Monrovia Island, Vincent, Citrus, and Charter Oak.
Los Angeles County is split between this district, the 28th district, the 34th district, and the 38th district. The 31st and the 28th are partitioned by Rio Hondo River, Garvey Ave, Highway 19, Highway 10, Eaton Wash, Temple City Blvd, Valley Blvd, Ellis Ln, Lower Azusa Rd, Grande Ave, Santa Anita Ave, Lynrose St, Flood Control Basin, Peck Rd, Randolph St, Cogswell Rd, Clark St, Durfree Ave, Santa Anita Wash, S 10th Ave, Jeffries Ave, Mayflower/Fairgreen Ave, Alta Vista/Fairgreen Ave, El Norte Ave, S 5th Ave, Valencia Way/N 5th Ave, Hillcrest Blvd, E Hillcrest Blvd, Grand Ave, E Greystone Ave, N Bradoaks Ave, Angeles National Forest, W Fork Rd, Highway 39, Cedar Creek, Iron Fork, Glendora Mountain Rd, Morris Reservoir, W Sierra Madre Ave, N Lorraine Ave, E Foothill Blvd, E Carroll Ave, Steffen St, S Lorraine Ave, AT and SF Railway, E Route 66, N Cataract Ave, San Dimas Canyon Rd, Clayton Ct, Live Oak Canyon, Rotary Dr, Highway 30, Williams Ave, Highway 210, Garey Ave, and Summer Ave.
The 31st, 35th, and 38th are partitioned by Whittier Narrows Recreation Area, N Lexington-Gallatin Rd, N Durfree Ave, E Thienes Ave, E Rush St, N Burkett Rd, Cunningham Dr, Eaglemont Dr, Oakman Dr, Arciero Dr, Grossmont Dr, Workman Mill Rd, Bunbury Dr, Fontenoy Ave, Ankerton, Whittier Woods Circle, Union Pacific Railroad, San Gabriel Freeway, N Peck Rd, Mission Mill Rd, Rose Hills Rd, Wildwood Dr, Clark Ave, San Jose Creek, Turnbull Canyon Rd, E Gale Ave, Pomona Freeway, Colima Rd, E Walnut Dr N, Nogales St, E Walnut Dr S, Fairway Dr, E Valley Blvd, Calle Baja, La Puente Rd, S Sentous Ave, N Nogales St, Amar Rd, Walnut City Parkland, San Bernardino Freeway, Fairplex Dr, Via Verde, Puddingstone Reservoir, McKinley Ave, N Whittle Ave, Arrow Highway, Fulton Rd, and Foothill Blvd.

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

* West Covina – 109,501
* El Monte – 109,450
* Baldwin Park – 72,176
* Glendora – 52,558
* Covina – 51,268
* Azusa – 50,000
* La Puente – 38,062
* Monrovia – 37,931
* San Dimas – 34,064
* La Verne – 31,334
* West Puente Valley – 22,959
* Valinda – 22,437
* Duarte – 21,727
* South San Jose Hills – 19,855
* South El Monte – 19,567
* Vincent – 15,714
* Avocado Heights – 13,317
* Citrus – 10,243

### 2,500 to 10,000 people

* Charter Oak – 9,739
* South Monrovia Island – 6,515
* Mayflower Village – 5,402
* North El Monte – 3,730

## List of members representing the district

| Member | Party | Dates | Cong ress(es) | Electoral history | Counties |
| District created January 3, 1963 ||||||
| Charles H. Wilson (Hawthorne) | Democratic | January 3, 1963 – January 3, 1981 | 88th 89th 90th 91st 92nd 93rd 94th 95th 96th | Elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Lost re-nomination. | 1963–1969 Los Angeles |
| Charles H. Wilson (Hawthorne) | Democratic | January 3, 1963 – January 3, 1981 | 88th 89th 90th 91st 92nd 93rd 94th 95th 96th | Elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Lost re-nomination. | 1969–1973 Los Angeles |
| Charles H. Wilson (Hawthorne) | Democratic | January 3, 1963 – January 3, 1981 | 88th 89th 90th 91st 92nd 93rd 94th 95th 96th | Elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Lost re-nomination. | 1973–1975 Los Angeles |
| Charles H. Wilson (Hawthorne) | Democratic | January 3, 1963 – January 3, 1981 | 88th 89th 90th 91st 92nd 93rd 94th 95th 96th | Elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Lost re-nomination. | 1975–1983 Los Angeles |
| Mervyn M. Dymally (Compton) | Democratic | January 3, 1981 – January 3, 1993 | 97th 98th 99th 100th 101st 102nd | Elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Retired. | 1975–1983 Los Angeles |
| Mervyn M. Dymally (Compton) | Democratic | January 3, 1981 – January 3, 1993 | 97th 98th 99th 100th 101st 102nd | Elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Retired. | 1983–1993 Los Angeles (Carson, Compton) |
| Matthew G. Martínez (Monterey Park) | Democratic | January 3, 1993 – July 27, 2000 | 103rd 104th 105th 106th | Redistricted from the 30th district and re-elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Lost re-nomination. | 1993–2003 Los Angeles (Baldwin Park, East L.A.) |
| Matthew G. Martínez (Monterey Park) | Republican | July 27, 2000 – January 3, 2001 | 106th | Switched to Republican Party after losing re-nomination. | 1993–2003 Los Angeles (Baldwin Park, East L.A.) |
| Hilda Solis (El Monte) | Democratic | January 3, 2001 – January 3, 2003 | 107th | Elected in 2000. Redistricted to the 32nd district. | 1993–2003 Los Angeles (Baldwin Park, East L.A.) |
| Xavier Becerra (Los Angeles) | Democratic | January 3, 2003 – January 3, 2013 | 108th 109th 110th 111th 112th | Redistricted from the 30th district and re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Redistricted to the 34th district. | 2003–2013 Los Angeles (Hollywood, Northeast L.A.) |
| Gary Miller (Rancho Cucamonga) | Republican | January 3, 2013 – January 3, 2015 | 113th | Redistricted from the 42nd district and re-elected in 2012. Retired. | 2013–2023 Inland Empire including San Bernardino and Rancho Cucamonga |
| Pete Aguilar (Redlands) | Democratic | January 3, 2015 – January 3, 2023 | 114th 115th 116th 117th | Elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Redistricted to the 33rd district. | 2013–2023 Inland Empire including San Bernardino and Rancho Cucamonga |
| Grace Napolitano (Norwalk) | Democratic | January 3, 2023 – January 3, 2025 | 118th | Redistricted from the 32nd district and re-elected in 2022. Retired. | 2023–present Arcadia, El Monte, Baldwin Park, Duarte, West Covina, Covina, Azusa, southern Glendora, and most of Ramona in eastern Los Angeles County |
| Gil Cisneros (Covina) | Democratic | January 3, 2025 present | 119th | Elected in 2024. | 2023–present Arcadia, El Monte, Baldwin Park, Duarte, West Covina, Covina, Azusa, southern Glendora, and most of Ramona in eastern Los Angeles County |

## Election results
### 1962

1962 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 76,631 | 52.2 |
| | Republican | Gordon Hahn | 70,154 | 47.8 |
| Total votes | Total votes | Total votes | 146,785 | 100.0 |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |

### 1964

1964 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 114,246 | 64.0 |
| | Republican | Norman G. Shanahan | 64,256 | 36.0 |
| Total votes | Total votes | Total votes | 178,502 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1966

1966 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 92,875 | 63.4 |
| | Republican | Norman G. Shanahan | 53,708 | 36.6 |
| Total votes | Total votes | Total votes | 146,583 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1968

1968 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 94,387 | 58.9 |
| | Republican | James R. Dunn | 62,711 | 39.1 |
| | American Independent | Stanley L. Schulte | 3,134 | 2.0 |
| Total votes | Total votes | Total votes | 160,232 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1970

1970 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 102,071 | 73.2 |
| | Republican | Fred L. Casmir | 37,416 | 26.8 |
| Total votes | Total votes | Total votes | 139,487 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1972

1972 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 85,954 | 52.3 |
| | Republican | Ben Valentine | 69,876 | 42.5 |
| | Peace and Freedom | Roberta Lynn Wood | 8,582 | 5.2 |
| Total votes | Total votes | Total votes | 164,412 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1974

1974 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 60,560 | 70.5 |
| | Republican | Norman A. Hodges | 23,039 | 26.8 |
| | Peace and Freedom | William C. Taylor | 2,349 | 2.7 |
| Total votes | Total votes | Total votes | 85,948 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1976

1976 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 83,155 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1978

1978 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Charles H. Wilson (Incumbent) | 55,667 | 67.8 |
| | Republican | Don Grimshaw | 26,490 | 32.2 |
| Total votes | Total votes | Total votes | 82,157 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1980

1980 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally | 69,146 | 64.4 |
| | Republican | Don Grimshaw | 38,203 | 35.6 |
| Total votes | Total votes | Total votes | 107,349 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1982

1982 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally (Incumbent) | 86,718 | 72.4 |
| | Republican | Henry C. Minturn | 33,043 | 27.6 |
| Total votes | Total votes | Total votes | 119,761 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1984

1984 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally (Incumbent) | 100,658 | 70.7 |
| | Republican | Henry C. Minturn | 41,691 | 29.3 |
| Total votes | Total votes | Total votes | 142,349 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1986

1986 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally (Incumbent) | 77,126 | 70.3 |
| | Republican | Jack McMurray | 30,322 | 27.6 |
| | Peace and Freedom | B. Kwaku Duren | 2,333 | 2.1 |
| Total votes | Total votes | Total votes | 109,781 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1988

1988 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally (Incumbent) | 100,919 | 71.6 |
| | Republican | Arnold C. May | 36,017 | 25.5 |
| | Peace and Freedom | B. Kwaku Duren | 4,091 | 2.9 |
| Total votes | Total votes | Total votes | 151,027 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1990

1990 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mervyn M. Dymally (Incumbent) | 56,394 | 67.1 |
| | Republican | Eunice N. Sato | 27,593 | 32.9 |
| Total votes | Total votes | Total votes | 83,987 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1992

1992 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matthew G. Martínez (Incumbent) | 68,324 | 62.6 |
| | Republican | Reuben D. Franco | 40,873 | 37.4 |
| Total votes | Total votes | Total votes | 109,197 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1994

1994 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matthew G. Martínez (Incumbent) | 50,541 | 59.1 |
| | Republican | John V. Flores | 34,926 | 40.9 |
| Total votes | Total votes | Total votes | 85,467 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1996

1996 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matthew G. Martínez (Incumbent) | 69,285 | 67.5 |
| | Republican | John Flores | 28,705 | 28.0 |
| | Libertarian | Michael Everling | 4,700 | 4.5 |
| Total votes | Total votes | Total votes | 102,690 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1998

1998 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matthew G. Martínez (Incumbent) | 61,173 | 70.0 |
| | Republican | Frank C. Moreno | 19,786 | 22.7 |
| | Green | Krista Lieberg-Wong | 4,377 | 5.0 |
| | Libertarian | Michael B. Everling | 1,121 | 1.3 |
| | Natural Law | Gary Hearne | 903 | 1.03 |
| Total votes | Total votes | Total votes | 87,360 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2000

2000 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Hilda Solis | 89,600 | 79.4 |
| | Green | Krista Lieberg-Wong | 10,294 | 9.1 |
| | Libertarian | Michael McGuire | 7,138 | 6.3 |
| | Natural Law | Richard D. Griffin | 5,882 | 5.2 |
| Total votes | Total votes | Total votes | 112,914 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2002

2002 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (Incumbent) | 54,569 | 81.2 |
| | Republican | Luis Vega | 12,674 | 18.8 |
| Total votes | Total votes | Total votes | 67,243 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2004

2004 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (Incumbent) | 89,363 | 80.3 |
| | Republican | Luis Vega | 22,048 | 19.7 |
| Total votes | Total votes | Total votes | 111,411 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2006

2006 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (Incumbent) | 64,952 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2008

2008 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (Incumbent) | 110,955 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2010

2010 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (Incumbent) | 76,363 | 83.8 |
| | Republican | Stephen C. Smith | 14,740 | 16.2 |
| Total votes | Total votes | Total votes | 91,103 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2012

2012 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Republican | Gary Miller (Incumbent) | 88,964 | 55.2 |
| | Republican | Robert Dutton | 72,255 | 44.8 |
| Total votes | Total votes | Total votes | 161,219 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2014

2014 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pete Aguilar | 51,622 | 51.7 |
| | Republican | Paul Chabot | 48,162 | 48.3 |
| Total votes | Total votes | Total votes | 99,784 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2016

2016 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pete Aguilar (Incumbent) | 121,070 | 56.1 |
| | Republican | Paul Chabot | 94,866 | 43.9 |
| Total votes | Total votes | Total votes | 215,936 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2018

2018 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pete Aguilar (Incumbent) | 110,343 | 58.7 |
| | Republican | Sean Flynn | 77,352 | 41.3 |
| Total votes | Total votes | Total votes | 187,695 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

2020 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pete Aguilar (Incumbent) | 175,315 | 61.3 |
| | Republican | Agnes Gibboney | 110,735 | 38.7 |
| Total votes | Total votes | Total votes | 286,045 | 100 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2022

2022 United States House of Representatives elections in California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Grace Napolitano (Incumbent) | 91,472 | 59.5 |
| | Republican | Daniel Bocic Martinez | 62,153 | 40.5 |
| Total votes | Total votes | Total votes | 153,625 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Historical district boundaries

Formerly, from 2003 to 2013, the district was located in Los Angeles County. It was the only congressional district entirely based within the City of Los Angeles, and included Hollywood and some predominantly Hispanic/Latino sections of central and northeast Los Angeles.