Diane Papan
California State Assemblymember, District 21 since 2022. Re-elected in 2026. Next on the ballot in 2028.
- In office
- 3 yrs
- Since 2022
- Bills became law
- 13
- 36 sponsored, 2025–2026 session
- Votes missed
- 9.7%
- Chamber median 6.6%
- With party
- 100%
- On votes splitting the parties
- Last margin
- +56.3
- Won 2026
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET
Committees
As of 2026-10.
- Community Reinvestment Select · chair
- Fisheries and Aquaculture · vice chair
- Water, Parks and Wildlife · chair
- Alternative Protein Innovation Select
- Biotechnology and Medical Technology Select
- Environmental Safety and Toxic Materials
- Housing Construction Innovation Select
- Judiciary
- Ports and Goods Movement Select
- Select Committee on California and Armenia Mutual Trade, Art, and Cultural Exchange
- Select Committee on Growing and Retaining the Creative Economy in California
- Transportation
- Utilities and Energy
- Youth Mental Health and Treatment Accessibility Select
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
CaliforniaEnvironmentalQualityAct · Became law Sep 2026
SanMateoElectricBicycleSafetyPilotProgram · Became law Sep 2026
Planningandzoning · Became law Sep 2026
Lawsuits,liens,andotherencumbrances · Became law Sep 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Papan sits in the California State Assembly
Papan is closer to the center than 63% of the chamber's Democrats.
Closest: Buffy Wicks, Patrick Ahrens, Lori Wilson
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:46 PM ET
With Papan’s party
- Votes with the chamber's Democrats100%
- Cosponsorships of the other party's bills22%
Black tick: the average of Democrats in the California State Assembly.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Papan’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Papan | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Sep 1, 2026 | SB 886: California Technology Innovation and Ratepayer Protection Act. | Yes | Yes | No | Passed 62–7 |
| Sep 1, 2026 | SB 133: Education finance: education omnibus trailer bill. | Yes | Yes | No | Passed 66–9 |
| Aug 31, 2026 | SB 1246: Autonomous vehicles. | Yes | Yes | No | Passed 65–11 |
| Aug 31, 2026 | SB 1009: Juveniles: detention. | Not voting | Yes | No | Failed 24–33 |
| Aug 31, 2026 | SB 1301: Residential property insurance: nonrenewals. | Yes | Yes | No | Passed 63–11 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Papan 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 | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | California Assembly District 21 | Won | D+56.3 | D+52.4 | +3.9 |
| 2024 | California State Assembly, District 21 | Won | D+47.7 | — | — |
| 2022 | California State Assembly, District 21 | Won | D+44.9 | — | — |
Source: 99chambers results archive; 2026: California Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $680.2K
- Spent
- $594.8K
- Cash
- $755.7K
Source: California Secretary of State (Cal-Access) filings through Oct 17, 2026Updated Nov 7, 2026, 1:31 PM ET
Campaign committees
Open committees can still raise and spend money.
| Papan for Assembly 2026 State | Active |
Source: California Secretary of State (Cal-Access) filings through Oct 17, 2026Updated Nov 7, 2026, 1:31 PM ET
Seats Papan has held
- California State Assembly, District 21 · since 2022
Source: 99chambers results archive
Who Papan has run against
- Jabra Muhawieh (R) · 2026 general, won
- Mark Gilham (R) · 2024 election, won
- Giselle Hale (D) · 2022 election, won
Source: 99chambers results archive; 2026: California Secretary of State (unofficial)
How we know Papan
One person, matched across every source we use.
- Open States ocd-person/20c72bef-f518-4677-bbcb-83c502c36ede
- Wikidata Q115668848
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET