Mark Spencer
Indiana State Senator, District 3 since 2024. Next on the ballot in 2028.
- In office
- 1 yr
- Since 2024
- Bills became law
- 4
- 25 sponsored, 2025–2026 session
- Votes missed
- 8.0%
- Chamber median 2.2%
- With party
- 97%
- On votes splitting the parties
- Last margin
- +46.2
- Won 2024
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Homeland Security and Transportation · ranking democratic member
- Public Policy · ranking democratic member
- Veterans Affairs and The Military · ranking democratic member
- Child Services Interim Study
- Commerce and Economic Development Interim Study
- Commerce and Technology
- Elections Interim Study
- Energy, Utilities and Telecommunications Interim Study
- Natural Resources
- Public Policy Interim Study
- Public Safety and Military Affairs Interim Study
- Roads and Transportation Interim Study
- Utilities
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
AGENCIES; Department of Agriculture (ISDA) · Became law Mar 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Spencer sits in the Indiana State Senate
Spencer is closer to the center than 60% of the chamber's Democrats.
Closest: Fady Qaddoura, Greg Taylor, Lonnie Randolph
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:50 PM ET
With Spencer’s party
- Votes with the chamber's Democrats97%
- Cosponsorships of the other party's bills72%
Black tick: the average of Democrats in the Indiana State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Spencer’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Spencer | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Feb 27, 2026 | HB 1266: Department of education and education matters. | No | No | Yes | Passed 28–19 |
| Feb 26, 2026 | SB 285: Housing matters. | No | No | Yes | Passed 28–22 |
| Feb 26, 2026 | SB 27: Stadium authority. | Yes | Yes | Yes | Passed 45–4 |
| Feb 25, 2026 | SB 277: Indiana department of environmental management. | No | No | Yes | Passed 26–21 |
| Feb 24, 2026 | HB 1004: Various education matters. | No | No | Yes | Passed 28–20 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Spencer 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 |
|---|---|---|---|
| 2024 | Indiana State Senate, District 3 | Won | D+46.2 |
Source: 99chambers results archive
Seats Spencer has held
- Indiana State Senate, District 3 · since 2024
Source: 99chambers results archive
Who Spencer has run against
- Will Miller (R) · 2024 general, won
Source: 99chambers results archive
How we know Spencer
One person, matched across every source we use.
- Open States ocd-person/c553dcc6-1c2c-49d8-be04-e89e4d123d8b
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET