Michigan House of Representatives seat · lines in effect since 2024
Michigan House District 40
A district of about 92,000 people, 48% of adults with a bachelor's degree. It votes D+18.4 relative to the nation for president.
Where it sits among all 110 seats
Every Michigan House of Representatives 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 | 2024 | 2026 | |
|---|---|---|---|---|
| U.S. Senate | D+37.6 | D+35.7 | No race | No race |
| Governor | D+40.0 | No race | No race | No race |
| Michigan House of Representatives | No race | No race | D+14.9 | D+28.4 |
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 110 seats. Small marks are other seats in Michigan. The black marker is District 40.
Higher than 85% of seats.
Lower than 67% of seats.
Higher than 72% of seats.
Higher than 55% of seats.
Higher than 76% of seats.
Denser than 56% 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 8151% college gradsD+14.8Held DDistrict 75
47% college gradsD+20.2CountingDistrict 47
54% college gradsD+24.6Held DDistrict 80
50% college gradsD+18.4Held D
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 2024.
- Matt Longjohn (D)
2025– · Won 2024 by 14.9, 2026 by 28.4
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)