Mark Matthiesen
Missouri State Representative, District 107 since 2016. Ran for re-election in 2026; the count goes on.
- In office
- 9 yrs
- Since 2016
- Bills became law
- 0
- 28 sponsored, 2025–2026 session
- Last margin
- +21.0
- Won 2024
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET
Committees
As of 2026-10.
- Insurance · vice chair
- Consent and Procedure
- General Laws
- Ways and Means
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
POLITICAL SUBDIVISIONS · Failed in the Senate Mar 2026
ELECTIONS · Failed in the House May 2026
COUNTY OFFICIALS · Failed in the House Apr 2026
CHILDREN AND MINORS · Failed in the House Apr 2026
AMBULANCES AND AMBULANCE DISTRICTS · Failed in the House Apr 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Career
Offices held, and every time Matthiesen 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 | Missouri House District 107 | Counting | R+0.8 | R+19.6 | −18.8 |
| 2024 | Missouri House of Representatives, District 107 | Won | R+21.0 | — | — |
| 2022 | Missouri House of Representatives, District 107 | Won | R+19.9 | — | — |
| 2018 | Missouri House of Representatives, District 70 | Lost | D+0.7 | — | — |
| 2016 | Missouri House of Representatives, District 70 | Won | R+5.8 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Seats Matthiesen has held
- Missouri House of Representatives, District 107 · since 2022
- Missouri House of Representatives, District 70 · since 2016
Source: 99chambers results archive
Who Matthiesen has run against
- Gary Wester (D) · 2026 general
- Gary Wester (D) · 2024 election, won
- Tracy Grundy (D) · 2022 election, won
- Paula Brown (D) · 2018 election, lost
- Byron Delear (D) · 2016 election, won
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Matthiesen
One person, matched across every source we use.
- Open States ocd-person/661f49f4-e075-491e-aad8-4dde65ecb6df
- Wikidata Q55075516
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET