Michigan State Senate seat · lines in effect since 2026
Michigan Senate District 31
A district of about 267,000 people, 40% of adults with a bachelor's degree. It votes R+19.1 relative to the nation for president.
Where it sits among all 38 seats
Every Michigan State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2018 | 2020 | |
|---|---|---|
| U.S. Senate | R+29.6 | R+30.8 |
| Governor | R+26.1 | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 38 seats. Small marks are other seats in Michigan. The black marker is District 31.
Higher than 70% of seats.
Lower than 62% of seats.
Higher than 95% of seats.
Lower than 92% of seats.
Higher than 62% of seats.
Less dense than 78% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 2029% college gradsR+16.4Held RDistrict 23
42% college gradsR+23.2Held RDistrict 35
28% college gradsD+1.4Held DDistrict 18
26% college gradsR+23.5Held R
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2026.
- John Wetzel (R)
2027– · Won 2026 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)