Tom Umberg
California State Senator, District 34 since 2018. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 7 yrs
- Since 2018
- Bills became law
- 24
- 37 sponsored, 2025–2026 session
- Votes missed
- 2.3%
- Chamber median 4.2%
- With party
- 99%
- On votes splitting the parties
- Last margin
- +17.5
- Won 2022
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Judiciary · chair
- Business, Professions and Economic Development
- Elections and Constitutional Amendments
- International Sporting Events: Olympics and World Cup Soccer Special
- Military and Veterans Affairs
- Privacy, Digital Technologies and Consumer Protection
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Attorneys,arbitrators,judicialofficers,andalternativeresolutionproviders · Became law Sep 2026
Hazardousmaterials · Became law Sep 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Umberg sits in the California State Senate
Umberg is closer to the center than 80% of the chamber's Democrats.
Closest: Catherine Blakespear, Tim Grayson, Susan Rubio
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:46 PM ET
With Umberg’s party
- Votes with the chamber's Democrats99%
- Cosponsorships of the other party's bills27%
Black tick: the average of Democrats in the California State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Umberg’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Umberg | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Aug 31, 2026 | AB 1156: Williamson Act contracts: cancellation fees: photovoltaic solar facilities. | Yes | Yes | No | Passed 21–14 |
| Aug 31, 2026 | AB 1642: Wildfires: contamination standards. | Yes | Yes | No | Passed 30–2 |
| Aug 30, 2026 | AB 28: Solid waste landfills: subsurface temperatures. | Yes | Yes | No | Passed 31–3 |
| Aug 30, 2026 | AB 1198: Public works: prevailing wages. | Yes | Yes | No | Passed 31–9 |
| Aug 30, 2026 | AB 2434: Inmates: visitation. | Yes | Yes | No | Passed 30–9 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Umberg was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin |
|---|---|---|---|
| 2022 | California State Senate, District 34 | Won | D+17.5 |
| 2018 | California State Senate, District 34 | Won | D+1.2 |
| 2004 | California State Assembly, District 69 | Won | D+29.8 |
| 1992 | California State Assembly, District 69 | Won | D+26.0 |
| 1990 | California State Assembly, District 72 | Won | D+3.8 |
Source: 99chambers results archive
Seats Umberg has held
- California State Senate, District 34 · since 2018
- California State Assembly, District 69 · 2004–2006
- California State Assembly, District 69 · 1992–1994
- California State Assembly, District 72 · 1990–1992
Source: 99chambers results archive
Who Umberg has run against
- Rhonda Shader (R) · 2022 general, won
- Janet Nguyen (R) · 2018 general, won
- Otto Bade (R) · 2004 general, won
- Jo Ellen Allen (R) · 1992 general, won
- Curt Pringle (R) · 1990 general, won
Source: 99chambers results archive
How we know Umberg
One person, matched across every source we use.
- Open States ocd-person/cecabb81-51ab-46f5-9815-cc3486da0632
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET