California's 31st senatorial district

California's 31st State Senate district
Current senator	Richard Roth D–Riverside
Population (2010)  • Voting age  • Citizen voting age	940,612[1] 659,186[1] 476,314[1]
Demographics	28.71% White 9.17% Black 52.40% Latino 7.85% Asian 0.58% Native American 0.43% Hawaiian/Pacific Islander 0.25% other 0.61[1]% remainder of multiracial
Registered voters	451,552[2]
Registration	44.99% Democratic 27.50% Republican 21.90% No party preference

California's 31st senatorial district is one of 40 California State Senate districts. It is currently represented by Democrat Richard Roth of Riverside.

The district encompasses urbanized and suburban parts of the Inland Empire in northwestern Riverside County. It forms an arc stretching from Corona in the west to Perris in the southeast, centered on the city of Riverside.

The 31st Senate District has nested within it both the 60th Assembly District, represented by Democrat Corey Jackson; and the 61st Assembly District, represented by Democrat Tina McKinnor.^[3]

In the United States House of Representatives, the 30th Senate District is split between the California's 41st congressional district, represented by Republican Ken Calvert;^[4] and California's 42nd congressional district, represented by Democrat Robert Garcia.^[5]

Year	Office	Results
2021	Recall	No 54.5 – 45.5%
2020	President	Biden 58.3 – 39.6%
2018	Governor	Newsom 55.9 – 44.1%
	Senator	Feinstein 50.7 – 49.3%
2016	President	Clinton 57.4 – 36.9%
	Senator	Harris 53.5 – 46.5%
2014	Governor	Brown 50.6 – 49.4%
2012	President	Obama 57.5 – 40.3%
	Senator	Feinstein 59.0 – 41.0%

Senators	Party	Years served	Electoral history	Counties represented
District established January 3, 1887
A. W. Crandall (San Jose)	Republican	January 3, 1887 – January 2, 1893	Elected in 1886. Re-elected in 1888. [data missing]	Santa Clara
L. A. Whitehurst (Gilroy)	Democratic	January 2, 1893 – January 4, 1897	Elected in 1892. [data missing]
Henry V. Morehouse (San Jose)	Republican	January 4, 1897 – January 1, 1901	Elected in 1898. [data missing]
Louis Oneal (San Jose)	Republican	January 1, 1901 – January 2, 1905	Elected in 1900. [data missing]
Henry W. Lynch (Pleyto)	Republican	January 2, 1905 – January 6, 1913	Elected in 1904. Re-elected in 1908. [data missing]	Monterey, San Benito, San Luis Obispo
Edwin M. Butler (Los Angeles)	Republican	January 6, 1913 – January 8, 1917	Elected in 1912. [data missing]	Los Angeles
Harry A. Chamberlin (Los Angeles)	Republican	January 8, 1917 – January 7, 1929	Elected in 1916. Re-elected in 1920. Re-elected in 1924. [data missing]
Henry E. Carter (Los Angeles)	Republican	January 7, 1929 – January 2, 1933	Elected in 1928. [data missing]
Edgar W. Stow (Goleta)	Republican	January 2, 1933 – January 4, 1937	Elected in 1932. [data missing]	Santa Barbara
John J. Hollister Sr. (Santa Barbara)	Democratic	January 4, 1937 – January 6, 1941	Elected in 1936. Lost re-election.
Clarence C. Ward (Santa Barbara)	Republican	January 6, 1941 – May 9, 1955	Elected in 1940. Re-elected in 1944. Re-elected in 1948. Re-elected in 1952. Died.
Vacant		May 9, 1955 – December 2, 1955
John J. Hollister Jr. (Santa Barbara)	Democratic	December 2, 1955 – November 23, 1961	Elected to finish Ward's term. Re-elected in 1956. Re-elected in 1960. Died.
Vacant		November 23, 1961 – February 24, 1962
Alvin C. Weingand (Santa Barbara)	Democratic	February 24, 1962 – January 2, 1967	Elected to finish Hollister Jr.'s term. Re-elected in 1964. Redistricted to the 24th district and lost re-election.
James Q. Wedworth (Hawthorne)	Democratic	January 2, 1967 – November 30, 1976	Elected in 1966. Re-elected in 1968. Re-elected in 1972. Redistricted to the 27th district and lost re-election.	Los Angeles
George Deukmejian (Long Beach)	Republican	December 6, 1976 – January 8, 1979	Redistricted from the 37th district and re-elected in 1976. Resigned after becoming Attorney General.
Vacant		January 8, 1979 – April 26, 1979
Ollie Speraw (Long Beach)	Republican	April 26, 1979 – November 30, 1984	Elected to finish vacant term. Re-elected in 1980. Retired.
William Campbell (Hacienda Heights)	Republican	December 3, 1984 – December 15, 1989	Redistricted from the 33rd district and re-elected in 1984. Re-elected in 1988. Resigned.	Los Angeles, Orange
Vacant		December 15, 1989 – April 16, 1990
Frank Hill (Whittier)	Republican	April 16, 1990 – November 30, 1992	Elected to finish Campbell's term. Redistricted to the 29th district.
Bill Leonard (San Bernardino)	Republican	December 7, 1992 – November 30, 1996	Redistricted from the 25th district and re-elected in 1992. Retired to run for State Assembly.	Riverside, San Bernardino
Jim Brulte (Rancho Cucamonga)	Republican	December 2, 1996 – November 30, 2004	Elected in 1996. Re-elected in 2000. Retired due to term limits.
Robert Dutton (Rancho Cucamonga)	Republican	December 6, 2004 – November 30, 2012	Elected in 2004. Re-elected in 2008. Retired to run for U.S. House of Representatives.
Richard Roth (Riverside)	Democratic	December 3, 2012 – present	Elected in 2012. Re-elected in 2016. Re-elected in 2020. Retired due to term limits.	Riverside
Sabrina Cervantes (elect) (Riverside)	Democratic	December 2, 2024	Elected in 2024.

• California State Senate
• California State Senate districts
• Districts in California

• District map from the California Citizens Redistricting Commission