Mark Chapman
Oklahoma State Representative, District 12 since 2024. Ran in 1 election in 2024, winning 1. Re-elected in 2026. Next on the ballot in 2028.
- In office
- 1 yr
- Since 2024
- Bills became law
- 6
- 41 sponsored, 2025–2026 session
- Votes missed
- 8.1%
- Chamber median 7.0%
- With party
- 91%
- On votes splitting the parties
- Last margin
- +42.3
- Won 2026
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET
Committees
As of 2026-10.
- Utilities · vice chair
- Administrative Rules
- Energy and Natural Resources Oversight
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Became law May 2026
Became law May 2026
Became law May 2026
Became law May 2025
Became law May 2025
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Chapman sits in the Oklahoma House of Representatives
Chapman is closer to the center than 41% of the chamber's Republicans.
Closest: Eric Roberts, Chad Caldwell, Carl Newton
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:59 PM ET
With Chapman’s party
- Votes with the chamber's Republicans91%
Black tick: the average of Republicans in the Oklahoma House of Representatives.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Chapman’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Chapman | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| May 6, 2026 | SB 1916: Insurance Department; creating certain division within the Insurance Department;… | No | Yes | Yes | Passed 46–39 |
| Apr 28, 2026 | SB 1365: Central Purchasing Act; exempting certain purchases made by the Oklahoma Tourism and… | Yes | Yes | Yes | Passed 43–42 |
| Apr 21, 2026 | SB 1122: Ad valorem tax; requiring the State Board of Equalization to assess certain broadband… | Yes | Yes | No | Passed 56–38 |
| Apr 14, 2026 | SB 2060: Improvement districts; master development districts; requirements and procedures; bonds.… | Yes | Yes | No | Passed 54–40 |
| Apr 14, 2026 | HB 4036: Bringing Sitcoms Home from Hollywood Pilot Program Revolving Fund; making an… | No | Yes | No | Passed 53–42 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Chapman 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 | Oklahoma House of Representatives, District 12 | Won | R+42.3 | R+56.9 | −14.6 |
| 2024 | Oklahoma House of Representatives, District 12 | Won | R+58.1 | R+56.9 | +1.2 |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $126.1K
- Spent
- $127.8K
Source: Oklahoma Ethics Commission filings through Oct 17, 2026Updated Nov 1, 2026, 1:33 AM ET
Campaign committees
Open committees can still raise and spend money.
| MARK CHAPMAN State | Active |
| MARK CHAPMAN State | Active |
Source: Oklahoma Ethics Commission filings through Oct 17, 2026Updated Nov 1, 2026, 1:33 AM ET
Seats Chapman has held
- Oklahoma House of Representatives, District 12 · since 2024
Source: 99chambers results archive
Who Chapman has run against
- Tiffany Prater (D) · 2026 election, won
- Crystal Lagrone (D) · 2024 election, won
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Chapman
One person, matched across every source we use.
- Open States ocd-person/a688f8ac-d265-4830-963f-617b726524ed
- Wikidata Q131176192
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:52 PM ET