Illinois House of Representatives seat · lines in effect since 2022
Illinois Representative District 108
A district of about 117,000 people, 27% of adults with a bachelor's degree. It votes R+37.1 relative to the nation for president.
Where it sits among all 118 seats
Every Illinois 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.
| 2016 | 2018 | 2020 | |
|---|---|---|---|
| U.S. Senate | R+17.1 | No race | R+28.8 |
| Governor | No race | R+15.4 | 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 118 seats. Small marks are other seats in Illinois. The black marker is District 108.
Lower than 67% of seats.
Higher than 92% of seats.
Lower than 99% of seats.
Lower than 90% of seats.
Lower than 91% of seats.
Less dense than 90% 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 8727% college gradsR+38.1Held RDistrict 101
29% college gradsR+34.3Held RDistrict 99
25% college gradsR+40.8Held RDistrict 115
24% college gradsR+44.0Held 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 2022.
- Wayne A. Rosenthal (R)
2023– · Won 2022 unopposed, 2024 unopposed, 2026 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)