California State Senate District 34
Tue, Nov 3 · Represented by Tom Umberg Democratic (not a candidate in 2026) · Member list as of Oct 28
No published poll names both candidates.Last result · 2022 general: Tom Umberg (D) 58.8, Rhonda Shader (R) 41.2
- Last election
- Tom Umberg (Democratic) won by 17.6 points, 2022
- On the 2026 ballot
- 2 candidates
Side by side
Left column: ShaderRight column: Valencia
- Donor-based spectrum
- LiberalCentristConservativeShaderValencia
- Races
- Won 0 of 1
- Won 1 of 1
- Years since first win
- Not available
- 4
How these are counted
The spectrum is a published research score, not our rating. How this works. Wins and losses count the races in our results files, the same as each profile.
More about this race
Candidates on the ballot
Open seat
The current holder, Tom Umberg, is not on the candidate list.
- Avelino ValenciaDemocraticCalifornia State Assemblymember
- Rhonda ShaderRepublicanLocal Small Businesswoman
Source: elections.cdn.sos.ca.gov (PDF), dated Aug 27
All State Senate districts
- Democratic
- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
Map settings
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Official results for California
History (14 elections for this seat)
- Votes for listed candidates
- 164,052
- Election day
- November 8, 2022
- District map
- Older district map (2022)
California Senate District 34, 1970 to 2022, 2022, every candidate Candidate Party Votes and share Share DemocraticTom UmbergWon(incumbent) Democratic 96,41958.8% RepublicanRhonda Shader Republican 67,63341.2% - Votes for listed candidates
- 267,035
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
California Senate District 34, 1970 to 2022, 2018, every candidate Candidate Party Votes and share Share DemocraticTom UmbergWon Democratic 135,06250.6% RepublicanJanet Nguyen(incumbent) Republican 131,97349.4% - Votes for listed candidates
- 165,012
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
California Senate District 34, 1970 to 2022, 2014, every candidate Candidate Party Votes and share Share RepublicanJanet NguyenWon Republican 95,79258.0% DemocraticJose Solorio Democratic 69,22042.0% - Votes for listed candidates
- 135,269
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
California Senate District 34, 1970 to 2022, 2010, every candidate Candidate Party Votes and share Share DemocraticLou CorreaWon(incumbent) Democratic 88,89265.7% RepublicanLucille Kring Republican 46,37734.3% - Votes for listed candidates
- 111,676
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
California Senate District 34, 1970 to 2022, 2006, every candidate Candidate Party Votes and share Share DemocraticLou CorreaWon Democratic 56,53450.6% RepublicanLynn Daucher Republican 55,14249.4% - Votes for listed candidates
- 102,510
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
California Senate District 34, 1970 to 2022, 2002, every candidate Candidate Party Votes and share Share DemocraticJoseph DunnWon(incumbent) Democratic 63,48561.9% RepublicanAraceli Gonzalez Republican 39,02538.1% - Votes for listed candidates
- 120,996
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
California Senate District 34, 1970 to 2022, 1998, every candidate Candidate Party Votes and share Share DemocraticJoseph DunnWon Democratic 62,06351.3% RepublicanRob Hurtt(incumbent) Republican 58,93348.7% - Votes for listed candidates
- 121,634
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
California Senate District 34, 1970 to 2022, 1994, every candidate Candidate Party Votes and share Share RepublicanRob HurttWon Republican 69,70557.3% DemocraticDonna Chessen Democratic 44,49936.6% LibertarianThomas E. Reimer Libertarian 7,4306.1% - Votes for listed candidates
- 156,301
- Election day
- November 6, 1990
- District map
- Older district map (1984 to 1991)
California Senate District 34, 1970 to 2022, 1990, every candidate Candidate Party Votes and share Share DemocraticRuben S. AyalaWon(incumbent) Democratic 80,94951.8% RepublicanCharles Bader Republican 75,35248.2% - Votes for listed candidates
- 141,831
- Election day
- November 4, 1986
- District map
- Older district map (1984 to 1991)
California Senate District 34, 1970 to 2022, 1986, every candidate Candidate Party Votes and share Share DemocraticRuben S. AyalaWon(incumbent) Democratic 93,41065.9% RepublicanSteve Turner Republican 48,42134.1% - Votes for listed candidates
- 152,028
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1983)
California Senate District 34, 1970 to 2022, 1982, every candidate Candidate Party Votes and share Share DemocraticRuben S. AyalaWon(incumbent) Democratic 101,70866.9% RepublicanDean L. Kurtz Republican 50,32033.1% - Votes for listed candidates
- 180,954
- Election day
- November 7, 1978
- District map
- Older district map (1974 to 1981)
California Senate District 34, 1970 to 2022, 1978, every candidate Candidate Party Votes and share Share DemocraticRobert PresleyWon(incumbent) Democratic 100,74955.7% RepublicanJohn Stanton Republican 80,20544.3% - Votes for listed candidates
- 147,740
- Election day
- November 4, 1974
- District map
- Older district map (1974 to 1981)
California Senate District 34, 1970 to 2022, 1974, every candidate Candidate Party Votes and share Share DemocraticRobert PresleyWon Democratic 70,84948.0% RepublicanW. Craig Biddle Republican 70,59747.8% OtherNial D. Meadows Other 6,2944.3% - Votes for listed candidates
- 279,586
- Election day
- November 3, 1970
- District map
- Older district map (1966 to 1973)
California Senate District 34, 1970 to 2022, 1970, every candidate Candidate Party Votes and share Share RepublicanDennis E. CarpenterWon Republican 189,12167.6% DemocraticDwight W. Mize Democratic 85,74030.7% OtherJohn W. Ellzey Other 4,7251.7%
1970 to 2022: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), retrieved Oct 28, 2026. Compiled by Carl Klarner (Harvard Dataverse) from official returns; not an official source
Only part of this chamber is up in a given cycle. Which districts vote on which date is not on file. Last contest in this district on file: 2022.
Download and cite
Cite this page
Election Wrld. (2026). California State Senate District 34, election results 1970 to 2022. https://www.electionwrld.com/ca/senate/34. Retrieved October 31, 2026.
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<p style="font-size:13px">Data: <a href="https://www.electionwrld.com">Election Wrld</a>, CC BY 4.0</p>Sources
Sources: Census TIGERweb Legislative MapServer (120th CDs layer 0, 119th CDs layer 4, 2026 SLD upper layer 1 and lower layer 2) (US Census Bureau, public domain), retrieved Oct 28, 2026; Open Civic Data division identifiers (census_autogenerated us_sldl/us_sldu and openstates state files); also (sld-recent.json): Open Civic Data division identifiers (country-us) (CC0 (repository); also (sld-recent.json): CC0 1.0), retrieved Oct 28, 2026; Open States people (current) CSVs (CC0-1.0 (Open States people data)), retrieved Oct 28, 2026, compiled by Open States volunteers and staff (rosters from state legislature sites) from official returns, not an official source; State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse) (CC0 1.0), retrieved Oct 28, 2026, compiled by Carl Klarner (Harvard Dataverse) from official returns, not an official source.
District id: ocd-division/country:us/state:ca/sldu:34
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY)Data as of Oct 28, 2026