California's 18th State Assembly district

California's 18th State Assembly district
Current assemblymember	Mia BontaD–Alameda
Population (2010) • Voting age • Citizen voting age	469,665[1]365,624[1]281,791[1]
Demographics	23.96% White 23.32% Black 26.30% Latino 23.50% Asian 0.56% Native American 0.70% Hawaiian/Pacific Islander 0.33% other 1.33[1]% remainder of multiracial
Registered voters	270,094
Registration	64.05% Democratic6.82% Republican24.79% No party preference

California's 18th State Assembly district is one of 80 CaliforniaState Assembly districts. It is currently represented by DemocratMia Bonta of Alameda after winning the special election. She is married to her predecessor and the state's 34th Attorney General, Rob Bonta.

District profile

The district encompasses the central East Bay, centered on the city of Oakland.

Alameda County – (28.83%) Alameda Oakland – (89.15%) Emeryville

Election results from statewide races

Year	Office	Results
2021	Governor	Newsom 90 – 10%
	Senator	Padilla 90.5 – 9.5%
2021	Recall	No 88.9 – 11.1%
2020	President[2]	Biden 86.5 – 11.3%
2018	Governor	Newsom 88.3 – 11.7%
	Senator	Feinstein 58.9 – 41.1%
2016	President	Clinton 85.9 – 8.4%
	Senator	Harris 78.7 – 21.3%
2014	Governor	Brown 89.6 – 10.4%
2012	President	Obama 86.9 – 10.2%
	Senator	Feinstein 89.5 – 10.5%

List of assembly members representing the district

Due to redistricting, the 18th district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by the California Citizens Redistricting Commission.

Assembly members	Party	Years served	Counties represented	Notes
Hugh McElroy LaRue	Democratic	January 3, 1883 – January 5, 1885	Sacramento
Winfield J. Davis	Republican	January 5, 1885 – January 3, 1887
Harry W. Carroll		January 3, 1887 – January 7, 1889
William M. Petrie		January 7, 1889 – January 5, 1891
Judson C. Brusie		January 5, 1891 – January 2, 1893
Owen Wade		January 2, 1893 – January 4, 1897	Napa
Frank Coombs		January 4, 1897 – January 2, 1899
Owen Wade		January 2, 1899 – January 1, 1901
Edward L. Webber		January 1, 1901 – January 5, 1903
John M. Higgins		January 5, 1903 – January 2, 1905	Sacramento
Frank J. O'Brien		January 2, 1905 – January 4, 1909
Eldridge Lafayette Hawk		January 4, 1909 – January 2, 1911
John C. March		January 2, 1911 – January 6, 1913
Thomas D. Johnston		January 6, 1913 – January 4, 1915	Contra Costa
William R. Sharkey	Progressive	January 4, 1915 – January 8, 1917
William E. Calahan	Republican	January 8, 1917 – December 25, 1919		Died in office.[3]
Vacant		December 25, 1919 – January 3, 1921
James N. Long	Republican	January 3, 1921 – January 8, 1923
Thomas M. Carlson		January 8, 1923 – January 5, 1925
Robert P. Easley		January 5, 1925 – January 5, 1931
Edwin H. Zion		January 5, 1931 – January 2, 1933	Stanislaus
Charles W. Fisher		January 2, 1933 – January 4, 1937	Alameda
Henry A. Dannenbrink	Democratic	January 4, 1937 – January 2, 1939
James H. Phillips	Republican	January 2, 1939 – January 4, 1943
Gardiner Johnson		January 4, 1943 – January 6, 1947
Thomas W. Caldecott		January 6, 1947 – September 26, 1957		Resigned from the State Assembly to become a judge.[4]
Vacant		September 26, 1957 – January 3, 1958
Don Mulford	Republican	January 3, 1958 – January 7, 1963		Sworn in after winning a special election.[5]
Edward M. Gaffney	Democratic	January 7, 1963 – January 4, 1965	San Francisco
Willie Brown		January 4, 1965 – November 30, 1974
Leo T. McCarthy		December 2, 1974 – November 30, 1982
Alister McAlister		December 6, 1982 – November 30, 1986	Alameda, Santa Clara
Delaine Eastin		December 1, 1986 – November 30, 1992
Johan Klehs		December 7, 1992 – November 30, 1994	Alameda
Michael Sweeny		December 5, 1994 – November 30, 1998
Ellen Corbett		December 7, 1998 – November 30, 2004
Johan Klehs		December 6, 2004 – November 30, 2006
Mary Hayashi		December 4, 2006 – November 30, 2012
Rob Bonta		December 3, 2012 – April 23, 2021		Resigned from the State Assembly to become the Attorney General of California.
Vacant		April 23, 2021 – September 7, 2021
Mia Bonta	Democratic	September 7, 2021 – present		Sworn in after winning special election.

Election results (1990–present)

Contents

• 1990
• 1992
• 1994
• 1996
• 1998
• 2000
• 2002
• 2004
• 2006
• 2008
• 2010
• 2012
• 2014
• 2016
• 2018
• 2020
• 2021 (special)
• 2022
• 2024

2024

2024California State Assembly 18th district election^[6][7]

Primary election
Party		Candidate	Votes	%
	Democratic	Mia Bonta (incumbent)	73,155	84.9
	American Independent	Andre Sandford	4,582	5.3
	Republican	Mindy Pechenuk	4,397	5.1
	Republican	Cheyenne Kenney	4,012	4.7
Total votes			86,146	100.0
General election
	Democratic	Mia Bonta (incumbent)	134,073	80.3
	American Independent	Andre Sandford	32,983	19.7
Total votes			167,056	100.0
	Democratichold

2022

2022California State Assembly 18th district election^[8][9]

Primary election
Party		Candidate	Votes	%
	Democratic	Mia Bonta	69,142	100.0
	Republican	Mindy Pechenuk (write-in)	31	0.0
Total votes			69,173	100.0
General election
	Democratic	Mia Bonta	120,863	89.9
	Republican	Mindy Pechenuk	13,504	10.1
Total votes			134,367	100.0
	Democratichold

2021 (special)

2021 California State Assembly 18th district special electionVacancy resulting from the resignation of Rob Bonta^[10][11]

Primary election
Party		Candidate	Votes	%
	Democratic	Mia Bonta	22,558	38.0
	Democratic	Janani Ramachandran	14,036	23.7
	Democratic	Malia Vella	10,053	16.9
	Republican	Stephen Slauson	5,725	9.6
	Democratic	Victor Aguilar	3,938	6.6
	Democratic	James Aguilar	1,039	1.8
	Democratic	Eugene Canson	1,029	1.7
	No party preference	Joel Britton	750	1.3
Total votes			59,128	100.0
General election
	Democratic	Mia Bonta	43,762	56.9
	Democratic	Janani Ramachandran	33,181	43.1
Total votes			76,943	100.0
	Democratichold

2020

2020California State Assembly 18th district election^[12][13]

Primary election
Party		Candidate	Votes	%
	Democratic	Rob Bonta (incumbent)	118,300	89.3
	Republican	Stephen Slauson	14,158	10.7
Total votes			132,458	100.0
General election
	Democratic	Rob Bonta (incumbent)	190,168	87.6
	Republican	Stephen Slauson	26,942	12.4
Total votes			217,110	100.0
	Democratichold

2018

2018California State Assembly 18th district election^[14][15]

Primary election
Party		Candidate	Votes	%
	Democratic	Rob Bonta (incumbent)	85,354	89.0
	Republican	Stephen Slauson	10,549	11.0
Total votes			95,903	100.0
General election
	Democratic	Rob Bonta (incumbent)	150,862	88.9
	Republican	Stephen Slauson	18,894	11.1
Total votes			184,754	100.0
	Democratichold

2016

2016California State Assembly 18th district election^[16][17]

Primary election
Party		Candidate	Votes	%
	Democratic	Rob Bonta (incumbent)	98,202	89.1
	Republican	Roseann Slonsky-Breault	12,057	10.9
Total votes			110,259	100.0
General election
	Democratic	Rob Bonta (incumbent)	156,163	87.0
	Republican	Roseann Slonsky-Breault	23,273	13.0
Total votes			179,436	100.0
	Democratichold

2014

2014California State Assembly 18th district election^[18][19]

Primary election
Party		Candidate	Votes	%
	Democratic	Rob Bonta (incumbent)	44,321	85.8
	Republican	David Erlich	7,358	14.2
Total votes			51,679	100.0
General election
	Democratic	Rob Bonta (incumbent)	88,243	86.7
	Republican	David Erlich	13,537	13.3
Total votes			101,780	100.0
	Democratichold

2012

2012California State Assembly 18th district election^[20][21]

Primary election
Party		Candidate	Votes	%
	Democratic	Rob Bonta	23,007	36.9
	Democratic	Abel Guillen	18,521	29.7
	Democratic	Joel Young	11,680	18.8
	Republican	Rhonda Weber	9,082	14.6
Total votes			62,290	100.0
General election
	Democratic	Rob Bonta	75,865	50.5
	Democratic	Abel Guillen	74,422	49.5
Total votes			150,287	100.0
	Democratichold

2010

2010California State Assembly 18th district election^[22]

Party		Candidate	Votes	%
	Democratic	Mary Hayashi (incumbent)	85,237	75.2
	Republican	Michael Havig	28,124	24.8
Total votes			113,361	100.0
	Democratichold

2008

2008California State Assembly 18th district election^[23]

Party		Candidate	Votes	%
	Democratic	Mary Hayashi (incumbent)	115,780	77.5
	Republican	Lou Filipovich	33,596	22.5
Total votes			149,376	100.0
	Democratichold

2006

2006California State Assembly 18th district election^[24]

Party		Candidate	Votes	%
	Democratic	Mary Hayashi	69,411	67.8
	Republican	Jill Buck	32,897	32.2
Total votes			102,308	100.0
	Democratichold

2004

2004California State Assembly 18th district election^[25]

Party		Candidate	Votes	%
	Democratic	Johan Klehs (incumbent)	106,635	83.6
	Libertarian	Ronald J. Colfer	20,888	16.4
	No party	Lou Filipovich (write-in)	17	0.0
Total votes			127,540	100.0
	Democratichold

2002

2002California State Assembly 18th district election^[26]

Party		Candidate	Votes	%
	Democratic	Ellen M. Corbett (incumbent)	60,627	71.7
	Republican	Jack Hovingh	24,028	28.3
Total votes			84,655	100.0
	Democratichold

2000

2000California State Assembly 18th district election^[27]

Party		Candidate	Votes	%
	Democratic	Ellen Corbett (incumbent)	91,991	75.4
	Republican	Syed Rifat Mahmood	29,936	24.6
Total votes			121,927	100.0
	Democratichold

1998

1998California State Assembly 18th district election^[28]

Party		Candidate	Votes	%
	Democratic	Ellen M. Corbett	63,491	65.8
	Republican	Carol Nowicki	33,060	34.2
Total votes			96,551	100.0
	Democratichold

1996

1996California State Assembly 18th district election^[29]

Party		Candidate	Votes	%
	Democratic	Michael Sweeney (incumbent)	89,122	100.0
Total votes			89,122	100.0
	Democratichold

1994

1994California State Assembly 18th district election^[30]

Party		Candidate	Votes	%
	Democratic	Michael Sweeney	69,863	69.7
	Republican	Don J. Grundmann	30,310	30.3
Total votes			100,173	100.0
	Democratichold

1992

1992California State Assembly 18th district election^[31]

Party		Candidate	Votes	%
	Democratic	Johan Klehs (incumbent)	87,971	65.0
	Republican	Don J. Grundmann	38,027	28.1
	Libertarian	Terry L. Floyd	9,297	6.9
Total votes			135,295	100.0
	Democratichold

1990

1990California State Assembly 18th district election^[32]

Party		Candidate	Votes	%
	Democratic	Delaine Eastin (incumbent)	65,654	100.0
Total votes			65,654	100.0
	Democratichold

See also

• California State Assembly
• California State Assembly districts
• Districts in California

References

1. "Citizens Redistricting Commission Final Report, 2011"(PDF).
2. "2020 Presidential by Legislative District & Most Recent Election Result". CNalysis. Archived from the original on June 4, 2021. Retrieved June 9, 2021.
3. "William Calahan"(PDF). clerk.assembly.ca.gov.
4. "Thomas W. Caldecott". joincalifornia.com.
5. "Don Mulford Oath of Office"(PDF). clerk.assembly.ca.gov.
6. "March 5, 2024, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
7. "November 5, 2024, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
8. "June 7, 2022, Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
9. "November 8, 2022, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
10. "Official Canvass - State Assembly - 18th Assembly District* - Special Primary Election, June 29, 2021"(PDF). Secretary of State of California. Retrieved November 19, 2025.
11. "Official Canvass - State Assembly - 18th Assembly District* - Special General Election, August 31, 2021"(PDF). Secretary of State of California. Retrieved November 19, 2025.
12. "March 3, 2020, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
13. "November 3, 2020, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
14. "June 5, 2018, Statewide Direct Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
15. "November 6, 2018, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
16. "June 7, 2016, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
17. "November 8, 2016, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
18. "June 3, 2014, Statewide Direct Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
19. "November 4, 2014, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
20. "June 5, 2012, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
21. "November 6, 2012, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
22. "November 2, 2010, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
23. "November 4, 2008, Presidential General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 19, 2025.
24. "November 7, 2006, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
25. "November 2, 2004, Presidential General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
26. "November 5, 2002, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
27. "November 7, 2000, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
28. "November 3, 1998, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
29. "November 5, 1996, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
30. "November 8, 1994, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
31. "November 3, 1992, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.
32. "November 6, 1990, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 19, 2025.

External links

• District map from the California Citizens Redistricting Commission