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California's 45th congressional district - Wikipedia

California's 45th congressional district

Map

Interactive map of district boundaries since January 3, 2023

Representative
Population (2023)737,224
Median household
income		$102,317[1]
Ethnicity
Cook PVID+2[2]

California's 45th congressional district is a congressional district in the U.S. state of California currently represented by Democrat Derek Tran.

The 45th district was created as a result of the redistricting cycle after the 1980 census.

The district is based in Orange and Los Angeles counties and includes all of Garden Grove, Westminster, Cerritos, Buena Park, Placentia, Hawaiian Gardens, Cypress, Fountain Valley, Artesia, Los Alamitos, Rossmoor, and La Palma, as well as parts of Brea, Lakewood, and Fullerton.

In 2018, incumbent Representative Mimi Walters competed against a field of four Democrats and an independent candidate in the primary election for the 2018 midterm elections. On February 25, 2018, UC Irvine (UCI) assistant law professor Dave Min received the endorsement of the California Democratic Party.[3]

Min, former White House senior technology advisor Brian Forde,[4] former legislative assistant to Sherrod Brown (D-OH) Kia Hamadanchy,[5] UCI law professor Katie Porter,[6] and UCI business professor John Graham ran in the "top two" primary in June 2018. Walters and Porter placed first and second and advanced to the general election in November.

On November 14, 2018, eight days after polls closed, Dave Wasserman, then the House Editor for The Cook Political Report, projected that Porter had won the general election.[7]

In 2024, the election in this district was one of the state's most competitive. In its current form after the 2020 redistricting, the district has a significant presence of Asian-American voters.[8]

Recent election results from statewide races

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Year Office Results[9][10][11][12]
2008 President McCain 52% - 48%
2010 Governor Whitman 54% - 40%
Lt. Governor Maldonado 47% - 38%
Secretary of State Dunn 50% - 41%
Attorney General Cooley 59% - 32%
Treasurer Walters 48% - 44%
Controller Strickland 50% - 41%
2012 President Romney 49.1% - 48.7%
2014 Governor Kashkari 53% - 47%
2016 President Clinton 54% - 41%
2018 Governor Newsom 50.4% - 49.6%
Attorney General Becerra 52% - 48%
2020 President Biden 52% - 46%
2022 Senate (Reg.) Meuser 51% - 49%
Governor Dahle 51% - 49%
Lt. Governor Underwood Jacobs 51% - 49%
Secretary of State Bernosky 51% - 49%
Attorney General Hochman 52% - 48%
Treasurer Guerrero 53% - 47%
Controller Chen 54% - 46%
2024 President Harris 49% - 48%
Senate (Reg.) Garvey 50.5% - 49.5%
FIPS County Code[13] County Seat Population
37 Los Angeles Los Angeles 9,663,345
59 Orange Santa Ana 3,135,755

Under the 2020 redistricting, California's 45th congressional district is located in Southern California, taking up western Orange County and east Los Angeles County. The area in Orange County includes the cities of Cypress, Brea, Placentia, Westminster, Garden Grove, Buena Park, Fountain Valley, Los Alamitos, La Palma, and northern Fullerton, part of Yorba Linda; and the census-designated places Rossmoor and Midway City. The area in Los Angeles County includes the cities of Cerritos, Artesia, Hawaiian Gardens, and part of Lakewood.

Orange County is split between this district, the 40th district, the 46th district, and the 47th district. The 45th and 40th are partitioned by Orange Freeway, E Lambert Rd, Sunrise Rd, Foothill Ln, Wandering Ln, N Associated Rd, E Birch St, S Valencia Ave, La Plaza Dr, La Floresta Dr, La Crescenta Dr, Highway 90, 1053 E Imperial Highway-343 Tolbert St, Vesuvius Dr, Rose Dr, Wabash Ave, 6th St, Golden Ave, Carbon Canyon Creek, E Yorba Linda Blvd, Jefferson St, 1401 Zion Ave-N Van Buren St, Buena Vista Ave, 17225 Orange Blossom Ln-1480 E Howard Pl, 17511 Pine Cir-Orchard Dr, Mariposa Ave, Lakeview Ave, E Miraloma Ave, Fee-Ana St, Sierra Madre Cir, E Orangethorpe Ave, Burlington Northern Santa Fe Railroad, Kensington Ave, N Kraemer Blvd, Carbon Creek, and E La Jolla St.

The 45th and 46th are partitioned by Santa Ana River, W Lehnhardt Ave, Gloxinia Ave, Lilac Way, Edinger Ave, Pebble Ct, 10744 W Lehnhardt Ave-10726 Kedge Ave, 724 S Sail St-5641 W Barbette Ave-407 S Starboard St, Starboard St/S Cooper St, Taft St, Hazard Ave, N Euclid St, Westminster Ave, Clinton St, 14300 Clinton St-1001 Mar Les Dr, Mar Les Dr, 2729 Huckleberry Rd, N Fairview St, Fairview St, 13462 Garden Grove Blvd-13252 Marty Ln, Townley St/Siemon Ave, W Garden Grove Blvd, S Lewis St, W Chapman Ave, E Simmons Ave, S Haster St, Ascot Dr, W Orangewood Ave, S 9th St, 2209 S Waverly Dr-11751 S Waverly Dr, Euclid St, Haven Ln, W Dudley Ave, S Euclid St, Katella Ave, Dale St, Rancho Alamitos High School, Orangewood Ave, Barber City Channel, Arrowhead St, Del Rey Dr, Westcliff Dr, Lampson Ave, Fern St, Garden Glove Blvd, Union Pacific Railroad, 7772 W Chapman Ave-Bently Ave, Highway 39, Western Ave, Stanton Storm Channel, Knott Ave, 6970 Via Kannela-6555 Katella Ave, Cerritos Ave, 10490 Carlotta Ave-Ball Rd, John Beat Park, S Knott Ave, Solano Dr, Monterra Way, Campesina Dr, Holder Elementary School, W Orange Ave, 6698 Via Riverside Way-Orangeview Junior High School, W Lincoln Ave, 195 N Western Ave-298 N Western Ave, 3181 W Coolidge Ave-405 N Dale St, W Crescent Ave, N La Reina St, W La Palma Ave, Boisseranc Park, I-5 HOV Lane, Orangethorpe Ave, Fullerton Creek, Whitaker St, Commonwealth Ave, Los Angeles County Metro, W Malvern Ave, W Chapman Ave, E Chapman Ave, S Placentia Ave, Kimberly Ave, E Orangethorpe Ave, and 2500 E Terrace St-Highway 57.

The 45th and 47th are partitioned by Highway 405, Old Ranch Parkway, Seal Beach Blvd, St Cloud Dr, Montecito Rd, Rossmoor Center Way, 12240 Seal Beach Blvd-Los Alamitos Army Airfield, Bolsa Chica Channel, Rancho Rd, Harold Pl, Springdale St, 6021 Anacapa Dr-Willow Ln, Edward St, Bolsa Ave, Goldenwest St, McFadden Ave, Union Pacific Railroad, 15241 Cascade Ln-15241 Cedarwood Ave, Highway 39, Edinger Ave, Newland St, Heil Ave, Magnolia St, Warner Ave, Garfield Ave, and the Santa Ana River.

Los Angeles County is split between this district, the 38th district, and the 42nd district. The 45th and 42nd are partitioned by San Gabriel River, Palo Verde Ave, South St, Del Amo Blvd, Pioneer Blvd, Coyote Creek, Centralia Creek, Hawaiian Ave, Verne Ave, Bloomfield Park, Highway 605, 226th St, Dorado Cir, Cortner Ave, E Woodson St, Bloomfield Ave, Lilly Ave, Marna Ave, and Los Alamos Channel.

The 45th and 38th are partitioned by Valley View Ave, Southern Pacific Railroad, Alondra Blvd, 15917 Canyon Creek Rd-12371 Hermosura St, Norwalk Blvd, 166th St, and Cerritos College Child Development-Alondra Blvd.

Cities and CDPs with 10,000 or more people

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2,500 – 10,000 people

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List of members representing the district

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Member Party Dates Cong
ress(es) 		Electoral history Counties
District created January 3, 1983

Duncan Hunter
(Coronado)[14] 		Republican January 3, 1983 –
January 3, 1993 		98th
99th
100th
101st
102nd 		Redistricted from the 42nd 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 52nd district. 		1983–1993
Imperial, San Diego

Dana Rohrabacher
(Huntington Beach)[14] 		Republican January 3, 1993 –
January 3, 2003 		103rd
104th
105th
106th
107th 		Redistricted from the 42nd district and re-elected in 1992.
Re-elected in 1994.
Re-elected in 1996.
Re-elected in 1998.
Re-elected in 2000.
Redistricted to the 46th district. 		1993–2003
Orange

Mary Bono
(Palm Springs)[14] 		Republican January 3, 2003 –
January 3, 2013 		108th
109th
110th
111th
112th 		Redistricted from the 44th 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 36th district and lost re-election. 		2003–2013

Riverside

John Campbell
(Irvine)[15] 		Republican January 3, 2013 –
January 3, 2015 		113th Redistricted from the 48th district and re-elected in 2012.
Retired. 		2013–2023

Orange

Mimi Walters
(Irvine)[16] 		Republican January 3, 2015 –
January 3, 2019 		114th
115th 		Elected in 2014.
Re-elected in 2016.
Lost re-election.

Katie Porter
(Irvine)[17] 		Democratic January 3, 2019 –
January 3, 2023 		116th
117th 		Elected in 2018.
Re-elected in 2020.
Redistricted to the 47th district.

Michelle Steel
(Fountain Valley)[18] 		Republican January 3, 2023 –
January 3, 2025 		118th Redistricted from the 48th district and re-elected in 2022.
Lost re-election. 		2023–present:

Orange, Los Angeles

Derek Tran
(Orange) 		Democratic January 3, 2025–
present 		119th Elected in 2024.

1982 • 1984 • 1986 • 1988 • 1990 • 1992 • 1994 • 1996 • 1998 • 2000 • 2002 • 2004 • 2006 • 2008 • 2010 • 2012 • 2014 • 2016 • 2018 • 2020 • 2022 • 2024

Historical district boundaries

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From 2003 to 2013, this district was based in Riverside County. The district included the communities of Palm Springs, Moreno Valley, Palm Desert, Hemet, Cathedral City, Temecula, Blythe, Rancho Mirage, Murrieta, Indio, Indian Wells, La Quinta, Cabazon, Anza, Thermal, Idyllwild, Coachella, and other unincorporated areas of Riverside County.



  1. ^ Center for New Media & Promotion (CNMP), US Census Bureau. "My Congressional District". www.census.gov. Retrieved September 21, 2024.
  2. ^ "2022 Cook PVI: District Map and List". Cook Political Report. July 12, 2022. Retrieved January 10, 2023.
  3. ^ Hagen, Lisa (February 25, 2018). "California Dems endorse three candidates in pivotal House races". The Hill. Retrieved February 25, 2018.
  4. ^ Mai-Duc, Christine (July 19, 2017). "Former Obama advisor jumps in to challenge Rep. Mimi Walters in Orange County". Los Angeles Times. Retrieved July 25, 2017.
  5. ^ Wire, Sarah D. "A third challenger announces bid for Rep. Mimi Walters' Orange County seat". LA Times. Retrieved June 18, 2017.
  6. ^ Lagos, Marisa (May 21, 2017). "Democratic Hopefuls Look to Unseat Republicans in 2018". KQED News. Retrieved June 18, 2017.
  7. ^ Wasserman, Dave [@Redistrict] (November 14, 2018). "Projection: Katie Porter (D) has defeated Rep. Mimi Walters (R) in #CA45" (Tweet) – via Twitter.
  8. ^ Tensley, Brandon (November 3, 2022). "Battle over House seat in California is a wake-up call about the importance of Asian American voters". CNN. Retrieved September 8, 2023.
  9. ^ https://davesredistricting.org/maps#viewmap::fc9d2d06-7c7f-451c-92cb-122127a79c29
  10. ^ https://substack.com/@drewsavicki/p-47092588
  11. ^ "Complete Supplement to the Statement of Vote" (PDF). November 8, 2022. Archived (PDF) from the original on January 8, 2025. Retrieved January 21, 2025.
  12. ^ Giroux, Greg (January 24, 2025). "Two California Democrats Chart Middle Course in Trump Districts". Bloomberg Government. Retrieved February 5, 2025.
  13. ^ "California FIPS Codes". National Weather Service. Retrieved March 11, 2025.
  14. ^ a b c "Biographical Directory of the United States Congress 1774–2005" (PDF). govinfo.gov. Retrieved February 19, 2024.
  15. ^ "Ex-Congressman John Campbell asks $6.7 million for Irvine house with 'Bat-cave' garage". Orange County Register. July 8, 2016. Retrieved January 18, 2024.
  16. ^ Nominations clerk.house.gov
  17. ^ Nominations clerk.house.gov
  18. ^ Nominations clerk.house.gov
  19. ^ 1982 election results
  20. ^ 1984 election results
  21. ^ 1986 election results
  22. ^ 1988 election results
  23. ^ 1990 election results
  24. ^ 1992 election results
  25. ^ 1994 election results
  26. ^ 1996 election results
  27. ^ 1998 election results
  28. ^ 2000 election results
  29. ^ 2002 election results
  30. ^ 2004 election results
  31. ^ 2006 election results
  32. ^ 2008 election results
  33. ^ 2010 election results
  34. ^ 2012 election results
  35. ^ 2014 election results
  36. ^ 2016 election results
  37. ^ 2018 election results
  38. ^ 2020 election results
  39. ^ 2022 election results
  40. ^ 2024 election results

33°42′51″N 117°40′06″W / 33.71417°N 117.66833°W