California's 31st congressional district

California's 31st congressional district
California's 31st congressional district
	Interactive map of district boundaries
Representative	Gil Cisneros; D–Covina
Population (2024)	724,696
Median household; income	$90,291
Ethnicity	60.6% Hispanic; 19.6% Asian; 15.0% White; 2.3% Black; 1.8% Two or more races; 0.7% other;
Cook PVI	D+10

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

2023–2027 boundaries

Year	Office	Results^[3]^[4]^[5]
2008	President	Obama 63% - 36%
2010	Governor	Brown 57% - 37%
	Lt. Governor	Newsom 51% - 36%
	Secretary of State	Bowen 56% - 35%
	Attorney General	Harris 47% - 45%
	Treasurer	Lockyer 60% - 32%
	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%
	Governor	Newsom 58% - 42%
	Lt. Governor	Kounalakis 59% - 41%
	Secretary of State	Weber 59% - 41%
	Attorney General	Bonta 58% - 42%
	Treasurer	Ma 58% - 42%
	Controller	Cohen 56% - 44%
2024	President	Harris 57% - 40%
2024	Senate (Reg.)	Schiff 57% - 43%

Composition

FIPS County Code^[6]	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

Future composition

Los Angeles (part)
San Bernardino (part)

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
					1969–1973 Los Angeles
					1973–1975 Los Angeles
					1975–1983 Los Angeles
Mervyn 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 Dymally (Compton)	Democratic	January 3, 1981 – January 3, 1993	97th 98th 99th 100th 101st 102nd		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.
Hilda Solis (El Monte)	Democratic	January 3, 2001 – January 3, 2003	107th	Elected in 2000. Redistricted to the 32nd district.
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.
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.

Election results

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

1962

1962 United States House of Representatives elections in California^[7]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	76,631	52.2
	Republican	Gordon Hahn	70,154	47.8
Total votes			146,785	100.0
	Democratic win (new seat)

1964

1964 United States House of Representatives elections in California^[8]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	114,246	64.0
	Republican	Norman G. Shanahan	64,256	36.0
Total votes			178,502	100.0
	Democratic hold

1966

1966 United States House of Representatives elections in California^[9]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	92,875	63.4
	Republican	Norman G. Shanahan	53,708	36.6
Total votes			146,583	100.0
	Democratic hold

1968

1968 United States House of Representatives elections in California^[10]
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			160,232	100.0
	Democratic hold

1970

1970 United States House of Representatives elections in California^[11]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	102,071	73.2
	Republican	Fred L. Casmir	37,416	26.8
Total votes			139,487	100.0
	Democratic hold

1972

1972 United States House of Representatives elections in California^[12]
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			164,412	100.0
	Democratic hold

1974

1974 United States House of Representatives elections in California^[13]
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			85,948	100.0
	Democratic hold

1976

1976 United States House of Representatives elections in California^[14]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	83,155	100.0
	Democratic hold

1978

1978 United States House of Representatives elections in California^[15]
Party		Candidate	Votes	%
	Democratic	Charles H. Wilson (Incumbent)	55,667	67.8
	Republican	Don Grimshaw	26,490	32.2
Total votes			82,157	100.0
	Democratic hold

1980

1980 United States House of Representatives elections in California^[16]
Party		Candidate	Votes	%
	Democratic	Mervyn M. Dymally	69,146	64.4
	Republican	Don Grimshaw	38,203	35.6
Total votes			107,349	100.0
	Democratic hold

1982

1982 United States House of Representatives elections in California^[17]
Party		Candidate	Votes	%
	Democratic	Mervyn M. Dymally (Incumbent)	86,718	72.4
	Republican	Henry C. Minturn	33,043	27.6
Total votes			119,761	100.0
	Democratic hold

1984

1984 United States House of Representatives elections in California^[18]
Party		Candidate	Votes	%
	Democratic	Mervyn M. Dymally (Incumbent)	100,658	70.7
	Republican	Henry C. Minturn	41,691	29.3
Total votes			142,349	100.0
	Democratic hold

1986

1986 United States House of Representatives elections in California^[19]
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			109,781	100.0
	Democratic hold

1988

1988 United States House of Representatives elections in California^[20]
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			151,027	100.0
	Democratic hold

1990

1990 United States House of Representatives elections in California^[21]
Party		Candidate	Votes	%
	Democratic	Mervyn M. Dymally (Incumbent)	56,394	67.1
	Republican	Eunice N. Sato	27,593	32.9
Total votes			83,987	100.0
	Democratic hold

1992

1992 United States House of Representatives elections in California^[22]
Party		Candidate	Votes	%
	Democratic	Matthew G. Martínez (Incumbent)	68,324	62.6
	Republican	Reuben D. Franco	40,873	37.4
Total votes			109,197	100.0
	Democratic hold

1994

1994 United States House of Representatives elections in California^[23]
Party		Candidate	Votes	%
	Democratic	Matthew G. Martínez (Incumbent)	50,541	59.1
	Republican	John V. Flores	34,926	40.9
Total votes			85,467	100.0
	Democratic hold

1996

1996 United States House of Representatives elections in California^[24]
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			102,690	100.0
	Democratic hold

1998

1998 United States House of Representatives elections in California^[25]
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			87,360	100.0
	Democratic hold

2000

2000 United States House of Representatives elections in California^[26]
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			112,914	100.0
	Democratic gain from Republican

2002

2002 United States House of Representatives elections in California^[27]
Party		Candidate	Votes	%
	Democratic	Xavier Becerra (Incumbent)	54,569	81.2
	Republican	Luis Vega	12,674	18.8
Total votes			67,243	100.0
	Democratic hold

2004

2004 United States House of Representatives elections in California^[28]
Party		Candidate	Votes	%
	Democratic	Xavier Becerra (Incumbent)	89,363	80.3
	Republican	Luis Vega	22,048	19.7
Total votes			111,411	100.0
	Democratic hold

2006

2006 United States House of Representatives elections in California^[29]
Party		Candidate	Votes	%
	Democratic	Xavier Becerra (Incumbent)	64,952	100.0
	Democratic hold

2008

2008 United States House of Representatives elections in California^[30]
Party		Candidate	Votes	%
	Democratic	Xavier Becerra (Incumbent)	110,955	100.0
	Democratic hold

2010

2010 United States House of Representatives elections in California^[31]
Party		Candidate	Votes	%
	Democratic	Xavier Becerra (Incumbent)	76,363	83.8
	Republican	Stephen C. Smith	14,740	16.2
Total votes			91,103	100.0
	Democratic hold

2012

2012 United States House of Representatives elections in California^[32]
Party		Candidate	Votes	%
	Republican	Gary Miller (Incumbent)	88,964	55.2
	Republican	Robert Dutton	72,255	44.8
Total votes			161,219	100.0
	Republican hold

2014

2014 United States House of Representatives elections in California^[33]
Party		Candidate	Votes	%
	Democratic	Pete Aguilar	51,622	51.7
	Republican	Paul Chabot	48,162	48.3
Total votes			99,784	100.0
	Democratic gain from Republican

2016

2016 United States House of Representatives elections in California^[34]
Party		Candidate	Votes	%
	Democratic	Pete Aguilar (Incumbent)	121,070	56.1
	Republican	Paul Chabot	94,866	43.9
Total votes			215,936	100.0
	Democratic hold

2018

2018 United States House of Representatives elections in California^[35]
Party		Candidate	Votes	%
	Democratic	Pete Aguilar (Incumbent)	110,343	58.7
	Republican	Sean Flynn	77,352	41.3
Total votes			187,695	100.0
	Democratic hold

2020

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

2022

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

Historical district boundaries

Formerly, from 2003 to 2013, the district 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.

References

↑ US Census
↑ "2025 Cook PVI℠: District Map and List (119th Congress)". Cook Political Report. Retrieved April 5, 2025.
↑ "CA 2022 Congressional". davesredistricting.org. Retrieved October 7, 2025.
↑ "Supplement to Statement of Vote" (PDF). November 8, 2022. Archived (PDF) from the original on January 8, 2025. Retrieved January 21, 2025.
↑ "Supplement to Statement of Vote" (PDF). November 5, 2024. Archived (PDF) from the original on April 9, 2025. Retrieved April 5, 2025.
↑ "California FIPS Codes". National Weather Service. Retrieved March 11, 2025.
↑ 1962 election results
↑ 1964 election results
↑ 1966 election results
↑ 1968 election results
↑ 1970 election results
↑ 1972 election results
↑ 1974 election results
↑ 1976 election results
↑ 1978 election results
↑ 1980 election results
↑ 1982 election results
↑ 1984 election results
↑ 1986 election results
↑ 1988 election results
↑ 1990 election results
↑ 1992 election results
↑ 1994 election results
↑ 1996 election results
↑ 1998 election results
↑ 2000 election results
↑ 2002 election results
↑ 2004 election results
↑ 2006 election results
↑ 2008 election results
↑ 2010 election results
↑ 2012 election results
↑ 2014 election results
↑ 2016 election results
↑ 2018 election results

External links

34°06′36″N 117°21′12″W / 34.11000°N 117.35333°W / 34.11000; -117.35333

[1] US Census

[Cook-2] "2025 Cook PVI℠: District Map and List (119th Congress)". Cook Political Report. Retrieved April 5, 2025.

[3] "CA 2022 Congressional". davesredistricting.org. Retrieved October 7, 2025.

[4] "Supplement to Statement of Vote" (PDF). November 8, 2022. Archived (PDF) from the original on January 8, 2025. Retrieved January 21, 2025.

[5] "Supplement to Statement of Vote" (PDF). November 5, 2024. Archived (PDF) from the original on April 9, 2025. Retrieved April 5, 2025.

[6] "California FIPS Codes". National Weather Service. Retrieved March 11, 2025.

[7] 1962 election results

[8] 1964 election results

[9] 1966 election results

[10] 1968 election results

[11] 1970 election results

[12] 1972 election results

[13] 1974 election results

[14] 1976 election results

[15] 1978 election results

[16] 1980 election results

[17] 1982 election results

[18] 1984 election results

[19] 1986 election results

[20] 1988 election results

[21] 1990 election results

[22] 1992 election results

[23] 1994 election results

[24] 1996 election results

[25] 1998 election results

[26] 2000 election results

[27] 2002 election results

[28] 2004 election results

[29] 2006 election results

[30] 2008 election results

[31] 2010 election results

[32] 2012 election results

[33] 2014 election results

[34] 2016 election results

[35] 2018 election results

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California's 31st congressional district
Interactive map of district boundaries
Representative	Gil Cisneros D–Covina
Population (2024)	724,696
Median household income	$90,291^[1]
Ethnicity	60.6% Hispanic 19.6% Asian 15.0% White 2.3% Black 1.8% Two or more races 0.7% other
Cook PVI	D+10^[2]