Senator Tom Umberg

Seat	Senate District 34
Party	Democratic
Capitol office	Room 7510 · 1021 O Street
Mailing address	1021 O St. Suite 7510, Sacramento, CA 95814
Capitol phone	916-651-4034
Write to	senator.umberg@senate.ca.gov (official address)
Tenure	Serving since December 3, 2018

Committees 6

Senate Judiciary Committee Chair standing
Senate Business, Professions and Economic Development Committee standing
Senate Elections and Constitutional Amendments Committee standing
Senate International Sporting Events: Olympics and World Cup Soccer Special Committee standing
Senate Military and Veterans Affairs Committee standing
Senate Privacy, Digital Technologies and Consumer Protection Committee standing

Bills, 2025–2026 session 49 as principal author · 142 as coauthor

All 49 bills as principal author ›

Coauthor of AB 1043, AB 1130, AB 1454, AB 1572, AB 1770, AB 2071, AB 2115, AB 2156, AB 2294, AB 2341, AB 2541, AB 46 and 130 more.

Bills and sponsors: Open States bulk data (public domain dedication), 2026-10-public.pgdump; status is read from the official actions. About the momentum score

Effectiveness 2025–26 session

1.315th of 39 in the Senate
89th percentile

Bills & joint resolutions authored	36
… passed committee / chamber / both	36 / 31 / 26
… became law	21
Carried in the other chamber (became law)	0 (0)
Points vs. Senate majority average	255 ÷ 193.97 = 1.31
Most-authored topics	Health & mental health (8), Courts & civil law (6), Elections & ethics (5)

Senate rankings · How the score works. A count of bill progress, not a judgment of the member's work.

Closest allies co-authorship, 2025–26

Most bills written together

Sasha Pérez DSenate 25 24
Sabrina Cervantes DSenate 31 21
Bob Archuleta DSenate 30 18
Dave Cortese DSenate 15 17
Ben Allen DSenate 24 16
Anna Caballero DSenate 14 15
Catherine Blakespear DSenate 38 15
Eloise Reyes DSenate 29 14
Henry Stern DSenate 27 14
Laura Richardson DSenate 35 14

“Written together” = 2025–2026 session bills and joint resolutions on which both are principal author or coauthor (measures with more than 60 sponsors are left out). Sharing bills does not imply a personal or political alliance.

District 34

Counties: Los Angeles, Orange
Find your district: Who represents me?
Assembly members sharing a county: Tom Lackey (34), Juan Carrillo (39), Pilar Schiavo (40), John Harabedian (41), Jacqui Irwin (42), Celeste Rodriguez (43), Nick Schultz (44), Jesse Gabriel (46), Blanca Rubio (48), Mike Fong (49), Rick Zbur (51), Jessica Caloza (52), Michelle Rodriguez (53), Mark González (54), Isaac Bryan (55), Lisa Calderon (56), Sade Elhawary (57), Phillip Chen (59), Tina McKinnor (61), José Solache (62), Blanca Pacheco (64), Mike Gipson (65), Al Muratsuchi (66), Sharon Quirk-Silva (67), Avelino Valencia (68), Josh Lowenthal (69), Tri Ta (70), Kate Sanchez (71), Diane Dixon (72), Cottie Petrie-Norris (73), Laurie Davies (74)

District 34 outlined; neighbours link to their members. Full map › · Census 2024 boundaries, simplified.

Official district map: see the official Senate page.

Lobbyist reports naming this member 2025–2026

No lobbyist expenditure reports naming this member are in our data.

Registered lobbyists and the organizations they represent are on our sister site, the California Lobby Guide.

A reported expenditure is a legal, disclosed activity and does not imply wrongdoing.

Source

Copied from https://sd34.senate.ca.gov/ on October 30, 2026, through Open States people data (CC0), checked against official legislature rosters. Not endorsed by the California State Senate.