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California's 31st congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Grace Napolitano D–Norwalk
Population (2023)	717,084
Median household income	$88,407
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+15

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 Grace Napolitano.

Recent results in statewide elections

Election results from statewide races
Year	Office	Results
1990	Governor	Feinstein 60.6% – 34.8%
1992	President	Clinton 51.7% – 32.3%
	Senator	Boxer 48.9% – 41.1%
	Senator (special)	Feinstein 57.7% – 33.7%
1994	Governor	Brown 52.7% – 43.1%
	Senator	Feinstein 50.5% – 38.3%
1996	President	Clinton 65.4% – 25.8%
1998	Governor	Davis 71.6% – 25.3%
	Senator	Boxer 62.1% – 34.1%
2000	President	Gore 69.3% – 27.4%
	Senator	Feinstein 70.4% – 22.3%
2002	Governor	Davis 68.6% – 19.5%
2003	Recall	67.6% – 32.4%
		Bustamante 58.5% – 26.5%
2004	President	Kerry 76.9% – 21.6%
	Senator	Boxer 80.1% – 14.6%
2006	Governor	Angelides 66.8% – 26.8%
	Senator	Feinstein 79.1% – 14.0%
2008	President	Obama 79.9% – 17.8%
2010	Governor	Brown 77.9% – 16.6%
	Senator	Boxer 78.1% – 16.2%
2012	President	Obama 57.2% – 40.6%
	Senator	Feinstein 58.7% – 41.3%
2014	Governor	Brown 52.1% – 47.9%
2016	President	Clinton 57.7% – 36.6%
	Senator	Harris 57.2% – 42.8%
2018	Governor	Newsom 56.6% – 43.4%
	Senator	Feinstein 51.2% – 48.8%
2020	President	Biden 58.8% – 38.9%
2021	Recall	54.8% – 45.2%
2022	Governor	Newsom 58.4 - 41.6%
	Senator	Padilla 60.7 - 39.3%

Composition

As of the 2020 redistricting, California's 31st congressional district is located in Southern California. It takes up part of eastern Los Angeles County.

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. The 31st district takes in 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

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
					1969–1973 Los Angeles
					1973–1975 Los Angeles
					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.)
	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 – present	118th	Redistricted from the 32nd district and re-elected in 2022. Retiring at end of term.	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 (elect) (Yorba Linda)	Democratic	January 3, 2025		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

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.

See also

• List of United States congressional districts
• California's congressional districts

References

1. US Census
2. "2022 Cook PVI: District Map and List". Cook Political Report. Retrieved January 10, 2023.
3. Statement of Vote (1990 Governor)
4. Statement of Vote (1992 President)
5. Statement of Vote (1992 Senate)
6. Statement of Vote (1992 Senate)
7. Statement of Vote (1994 Governor)
8. Statement of Vote (1994 Senate)
9. Statement of Vote (1996 President)
10. Statement of Vote (1998 Governor) Archived September 29, 2011, at the Wayback Machine
11. Statement of Vote (1998 Senate) Archived September 29, 2011, at the Wayback Machine
12. Statement of Vote (2000 President)
13. Statement of Vote (2000 Senator)
14. Statement of Vote (2002 Governor)
15. Statement of Vote (2003 Recall Question)
16. Statement of Vote (2003 Governor)
17. Statement of Vote (2004 President)
18. Statement of Vote (2004 Senator)
19. Statement of Vote (2006 Governor)
20. Statement of Vote (2006 Senator)
21. Statement of Vote (2008 President)
22. Statement of Vote (2010 Governor)
23. Statement of Vote (2010 Senator)
24. Statement of Vote (2012 President)
25. Statement of Vote (2012 Senator)
26. Statement of Vote (2014 Governor)
27. Statement of Vote (2016 President)
28. Statement of Vote (2016 Senator)
29. Statement of Vote (2018 Governor)
30. Statement of Vote (2018 Senator)
31. "Daily Kos Elections' presidential results by congressional district for 2020, 2016, and 2012".
32. "Counties by Congressional District for Recall Question" (PDF). sos.ca.gov. September 14, 2021. Retrieved May 2, 2022.
33. "Counties by Congressional Districts for Governor" (PDF). sos.ca.gov. November 8, 2022. Retrieved May 4, 2023.
34. 1962 election results
35. 1964 election results
36. 1966 election results
37. 1968 election results
38. 1970 election results
39. 1972 election results
40. 1974 election results
41. 1976 election results
42. 1978 election results
43. 1980 election results
44. 1982 election results
45. 1984 election results
46. 1986 election results
47. 1988 election results
48. 1990 election results
49. 1992 election results
50. 1994 election results
51. 1996 election results
52. 1998 election results
53. 2000 election results
54. 2002 election results
55. 2004 election results
56. 2006 election results
57. 2008 election results
58. 2010 election results
59. 2012 election results
60. 2014 election results
61. 2016 election results
62. 2018 election results

External links

• GovTrack.us: California's 31st congressional district
• RAND California Election Returns: District Definitions
• California Voter Foundation map - CD31

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

• Congressional districts of California
• Government of San Bernardino County, California
• Inland Empire
• Rancho Cucamonga, California
• San Bernardino, California
• Colton, California
• Constituencies established in 1963
• 1963 establishments in California