Don Mayhew
Missouri State Representative, District 124 since 2018. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 7 yrs
- Since 2018
- Bills became law
- 0
- 62 sponsored, 2025–2026 session
- Last margin
- +65.6
- Won 2024
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Corrections and Public Institutions · chair
- Government Efficiency · vice chair
- Rules Committee on Legislative Oversight · vice chair
- Budget
- Budget Conference
- Commerce
- Fiscal Review
- Justice System
- Redistricting Special
- Transportation
- Transportation Oversight
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
BUSINESS AND COMMERCE · Failed in the House May 2026
BUSINESS AND COMMERCE · Failed in the House Apr 2026
COUNTIES · Failed in the House Apr 2026
ANIMALS · Failed in the House Apr 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Career
Offices held, and every time Mayhew 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 | Missouri House of Representatives, District 124 | Won | R+65.6 |
| 2022 | Missouri House of Representatives, District 124 | Won | — |
| 2020 | Missouri House of Representatives, District 121 | Won | — |
| 2018 | Missouri House of Representatives, District 121 | Won | R+38.6 |
Source: 99chambers results archive
Seats Mayhew has held
- Missouri House of Representatives, District 124 · since 2022
- Missouri House of Representatives, District 121 · since 2018
Source: 99chambers results archive
Who Mayhew has run against
- Tara Hallmark (D) · 2024 general, won
- Matt Heltz (D) · 2018 general, won
Source: 99chambers results archive
How we know Mayhew
One person, matched across every source we use.
- Open States ocd-person/af64f0a2-f3ff-4c6d-b24f-62c3941d1da4
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET