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California's 45th congressional district is a congressional district in the U.S. state of California. Katie Porter, a Democrat, has represented the district since January 2019. She is the first Democrat to do so.

California's 45th congressional district
Interactive map of district boundaries since 2023 (Used in the 2022 elections)
Representative	Katie Porter D–Irvine
Population (2021)	808,871
Median household income	$111,257[1]
Ethnicity	52.2% White 23.5% Asian 18.1% Hispanic 3.6% Two or more races 1.9% Black 0.6% other
Cook PVI	D+3[2]

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

The district is based in Orange County and includes all of Irvine, Tustin, North Tustin, Villa Park, Laguna Hills, Lake Forest, and Rancho Santa Margarita, as well as parts of Anaheim, Orange, Laguna Woods, Mission Viejo, and Trabuco Canyon.

Competitiveness

2018 midterm elections

Incumbent 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, 8 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 statewide races

Election results from statewide races
Year	Office	Results
1990	Governor[8]	Wilson 60.5% – 32.3%
1992	President[9]	Bush 42.3% – 32.2%
	Senator[10]	Herschensohn 56.6% – 34.0%
	Senator (Special)[10]	Seymour 54.5% – 40.4%
1994	Governor[11]	Wilson 67.6% – 27.5%
	Senator[12]	Huffington 58.7% – 31.7%
1996	President[13]	Dole 50.5% – 37.9%
1998	Governor[14]	Lungren 51.7% – 45.0%
	Senator[15]	Fong 56.2% – 39.4%
2000	President[16]	Bush 55.6% – 39.9%
	Senator[17]	Feinstein 50.0% – 41.8%
2002	Governor[18]	Simon 51.5% – 42.3%
2003	Recall[19][20]	Yes 68.4% – 31.6%
		Schwarzenegger 59.6% – 23.5%
2004	President[21]	Bush 56.0% – 43.1%
	Senator[22]	Boxer 49.5% – 47.0%
2006	Governor[23]	Schwarzenegger 65.2% - 31.0%
	Senator[24]	Feinstein 50.5% – 45.0%
2008	President[25]	Obama 51.5% – 46.9%
2010	Governor[26]	Whitman 50.2% – 43.9%
	Senator[27]	Fiorina 52.1% – 42.4%
2012	President[28]	Romney 54.8% – 43.0%
	Senator[29]	Emken 55.6% – 44.4%
2014	Governor[30]	Kashkari 58.5% – 41.5%
2016	President[31]	Clinton 49.8% – 44.4%
	Senator[32]	Harris 66.0% – 34.0%
2018	Governor[33]	Cox 50.6% – 49.4%
	Senator[34]	Feinstein 54.3% – 45.7%
2020	President[35]	Biden 53.6% – 42.5%
2021	Recall[36]	No 52.6% – 47.4%

Composition

#	County	Seat	Population
37	Los Angeles	Los Angeles	9,829,544
59	Orange	Santa Ana	3,167,809

As of the 2020 redistricting, California's 45th congressional district is located in Southern California. It takes up western Orange County and east Los Angeles.

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.

The 45th district takes in the cities of Cypress, Brea, Placentia, Westminster, Garden Grove, Buena Park, Fountain Valley, and northern Fullerton, as well as the census-designated place Rossmoor.

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. The 45th district takes in the cities of Cerritos, Artesia, and Hawaiian Gardens.

Cities & CDP with 10,000 or more people

• Garden Grove - 171,949
• Fullerton - 143,617
• Westminster - 90,643
• Buena Park - 84,034
• Fountain Valley - 57,047
• Placentia - 51,233
• Cypress - 50,151
• Brea - 47,325
• Cerritos - 49,578
• Artesia - 16,395
• Hawaiian Gardens - 14,149
• Rossmoor - 10,625

List of members representing the district

Member	Party	Dates	Cong ress(es)	Electoral history	Counties
District created January 3, 1983
Duncan Hunter	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	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	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	Republican	January 3, 2013 – January 3, 2015	113th	Redistricted from the 48th district and re-elected in 2012. Retired.	2013–Present Orange
Mimi Walters	Republican	January 3, 2015 – January 3, 2019	114th 115th	Elected in 2014. Re-elected in 2016. Lost re-election.
Katie Porter	Democratic	January 3, 2019 – Present	116th 117th	Elected in 2018. Re-elected in 2020. Redistricted to the 47th district.
Michelle Steel	Republican	January 3, 2023 –		Redistricted from the 48th district and re-elected in 2022.	2023–present: Orange County

Election results

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

1982

1982 United States House of Representatives elections in California[37]

Party		Candidate	Votes	%
	Republican	Duncan Hunter (Incumbent)	117,771	68.6
	Democratic	Richard Hill	50,148	29.2
	Libertarian	Jack R. Sanders	3,839	2.2
Total votes			171,758	100.0
	Republican hold

1984

1984 United States House of Representatives elections in California[38]

Party		Candidate	Votes	%
	Republican	Duncan Hunter (Incumbent)	149,011	75.1
	Democratic	David W. Guthrie	45,325	22.9
	Libertarian	Patrick "Pat" Wright	3,971	2.0
Total votes			198,307	100.0
	Republican hold

1986

1986 United States House of Representatives elections in California[39]

Party		Candidate	Votes	%
	Republican	Duncan Hunter (Incumbent)	118,900	58.1
	Democratic	Hewitt Fitts Ryan	82,800	40.5
	Libertarian	Lee Schwartz	2,975	1.4
Total votes			204,675	100.0
	Republican hold

1988

1988 United States House of Representatives elections in California[40]

Party		Candidate	Votes	%
	Republican	Duncan Hunter (Incumbent)	166,451	74.0
	Democratic	Pete Lepiscopo	54,012	24.0
	Libertarian	Perry Willis	4,440	2.0
Total votes			224,903	100.0
	Republican hold

1990

1990 United States House of Representatives elections in California[41]

Party		Candidate	Votes	%
	Republican	Duncan Hunter (Incumbent)	123,591	72.8
	Libertarian	Joe Shea	46,068	27.2
Total votes			169,659	100.0
	Republican hold

1992

1992 United States House of Representatives elections in California[42]

Party		Candidate	Votes	%
	Republican	Dana Rohrabacher (Incumbent)	123,731	54.5
	Democratic	Patricia "Pat" McCabe	88,508	39.0
	Libertarian	Gary David Copeland	14,777	6.5
Total votes			227,016	100.0
	Republican hold

1994

1994 United States House of Representatives elections in California[43]

Party		Candidate	Votes	%
	Republican	Dana Rohrabacher (Incumbent)	124,875	69.1
	Democratic	Brett Williamson	55,849	30.9
Total votes			180,724	100.0
	Republican hold

1996

1996 United States House of Representatives elections in California[44]

Party		Candidate	Votes	%
	Republican	Dana Rohrabacher (Incumbent)	125,326	61.0
	Democratic	Sally Alexander	68,312	33.2
	Libertarian	Mark Murphy	8,813	4.3
	Natural Law	Rand McDevitt	3,071	1.5
Total votes			205,522	100.0
	Republican hold

1998

1998 United States House of Representatives elections in California[45]

Party		Candidate	Votes	%
	Republican	Dana Rohrabacher (Incumbent)	94,296	58.7
	Democratic	Patricia W. Neal	60,022	37.3
	Libertarian	Don Hull	4,337	2.7
	Natural Law	William "Bill" Verkamp Jr.	2,115	1.3
Total votes			160,770	100.0
	Republican hold

2000

2000 United States House of Representatives elections in California[46]

Party		Candidate	Votes	%
	Republican	Dana Rohrabacher (Incumbent)	136,275	62.2
	Democratic	Ted Crisell	71,066	32.4
	Libertarian	Don Hull	8,409	3.8
	Natural Law	Constance Betton	3,635	1.6
Total votes			219,385	100.0
	Republican hold

2002

2002 United States House of Representatives elections in California[47]

Party		Candidate	Votes	%
	Republican	Mary Bono (Incumbent)	87,101	65.3
	Democratic	Elle K. Kurplewski	43,692	32.7
	Libertarian	Rod Miller-Boyer	2,740	2.0
Total votes			133,533	100.0
	Republican hold

2004

2004 United States House of Representatives elections in California[48]

Party		Candidate	Votes	%
	Republican	Mary Bono (Incumbent)	153,523	66.7
	Democratic	Richard J. Meyer	76,967	33.3
Total votes			230,490	100.0
	Republican hold

2006

2006 United States House of Representatives elections in California[49]

Party		Candidate	Votes	%
	Republican	Mary Bono (Incumbent)	99,638	60.7
	Democratic	David Roth	64,613	39.3
Total votes			164,251	100.0
	Republican hold

2008

2008 United States House of Representatives elections in California[50]

Party		Candidate	Votes	%
	Republican	Mary Bono (Incumbent)	155,166	58.3
	Democratic	Julie Bornstein	111,026	41.7
Total votes			266,192	100.0
Turnout				74.4
	Republican hold

2010

2010 United States House of Representatives elections in California[51]

Party		Candidate	Votes	%
	Republican	Mary Bono (Incumbent)	106,472	51.5
	Democratic	Steve Pougnet	87,141	42.1
	American Independent	Bill Lussenheide	13,188	6.4
Total votes			206,801	100.0
Turnout				60.5
	Republican hold

2012

2012 United States House of Representatives elections in California[52]

Party		Candidate	Votes	%
	Republican	John Campbell (Incumbent)	171,417	58.5
	Democratic	Sukhee Kang	121,814	41.5
Total votes			293,231	100.0
	Republican hold

2014

2014 United States House of Representatives elections in California[53]

Party		Candidate	Votes	%
	Republican	Mimi Walters	106,083	65.1
	Democratic	Drew E. Leavens	56,819	34.9
Total votes			162,902	100.0
	Republican hold

2016

2016 United States House of Representatives elections in California[54]

Party		Candidate	Votes	%
	Republican	Mimi Walters (Incumbent)	182,408	58.6
	Democratic	Ron Varasteh	128,996	41.4
Total votes			311,404	100.0
	Republican hold

2018

2018 United States House of Representatives elections in California[55]

Party		Candidate	Votes	%
	Democratic	Katie Porter	158,906	52.1
	Republican	Mimi Walters (Incumbent)	146,383	47.9
Total votes			305,289	100.0
	Democratic gain from Republican

2020

2020 United States House of Representatives elections in California

Party		Candidate	Votes	%
	Democratic	Katie Porter (Incumbent)	221,843	53.5
	Republican	Greg Raths	193,096	46.5
Total votes			414,939	100.0
	Democratic hold

Historical district boundaries

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.

See also

• List of United States congressional districts

References

External links

• GovTrack.us: California's 45th congressional district
• RAND California Election Returns: District Definitions
• California Voter Foundation map - CD45

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