California State Senate seat · lines in effect since 2022
California Senate District 23
A district of about 1,029,000 people, 51% Hispanic, 23% of adults with a bachelor's degree. It votes D+0.6 relative to the nation for president.
2024 election
Nov 5, 2024- Suzette Valladares (R) · won52.3%
- Kipp Mueller (D)47.7%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 40 seats
Every California State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every election for this seat
15 races since 1968; the seat changed party 1 time. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Suzette Valladares (R) | Kipp Mueller (D) | 4.7 |
| Lines first used in 2012 | |||
| 2020 | Rosilicie Ochoa Bogh (R) | Abigail Medina (D) | 5.0 |
| 2016 | Mike Morrell (R) | Ronald J. Odonnell (D) | 13.2 |
| 2012 | Bill Emmerson (R) | Melissa Odonnell (D) | 12.6 |
| Lines first used in 2002 | |||
| 2008 | Fran Pavley (D) | Rick Montaine (R) | 40.2 |
| 2004 | Sheila James Kuehl (D) | Leonard Michael Lanzi (R) | 36.6 |
| Lines first used in 1992 | |||
| 2000 | Sheila James Kuehl (D) | Daniel B. Rego (R) | 45.9 |
| 1996 | Tom Hayden (D) | Scott Schreiber (R) | 24.6 |
| 1992 | Tom Hayden (D) | Leonard H. McRoskey (R) | 22.8 |
| Lines first used in 1982 | |||
| 1988 | David Roberti (D) | Tom Larkin (R) | 41.1 |
| 1984 | David Roberti (D) | Thomas Hunter Russell (R) | 35.2 |
| Lines first used in 1972 | |||
| 1980 | David Roberti (D) | Norman Aaron White (R) | 31.4 |
| 1976 | David Roberti (D)Flip | Allen R. Adams (R) | 38.6 |
| 1972 | Lou Cusanovich (R) | Edward K. Burke (D) | 11.1 |
| Lines first used in 1962 | |||
| 1968 | Lou Cusanovich (R) | Gerald J. Porter (D) | 28.9 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 23
The state's districts in other chambers that share residents with this one, and the share of District 23's area in each.
Who lives here, compared
Grey bars show the spread of all 40 seats. Small marks are other seats in California. The black marker is District 23.
Lower than 85% of seats.
Higher than 69% of seats.
Higher than 67% of seats.
Higher than 90% of seats.
Lower than 82% of seats.
Less dense than 69% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 3164% HispanicD+12.2Not up in 2026District 14
66% HispanicD+8.4Held DDistrict 19
40% Hispanic · 28% college gradsR+2.6Not up in 2026District 29
64% Hispanic · 21% college gradsD+14.5Not up in 2026
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET