Illinois House of Representatives seat · lines in effect since 2022
Illinois Representative District 105
A district of about 82,000 people, 33% of adults with a bachelor's degree. It votes R+27.1 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 | 2024 | |
|---|---|---|---|---|
| U.S. Senate | R+31.9 | No race | R+24.8 | No race |
| Governor | No race | R+26.2 | No race | No race |
| Illinois House of Representatives | No race | No race | No race | R+37.9 |
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 105.
Lower than 53% of seats.
Higher than 82% of seats.
Lower than 86% of seats.
Lower than 87% of seats.
Lower than 69% of seats.
Less dense than 91% 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 7333% college gradsR+24.6Held RDistrict 93
27% college gradsR+25.9Held RDistrict 101
29% college gradsR+34.3Held RDistrict 89
25% college gradsR+28.7Held 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.
- Tim Ruestman (R)
2027– · Won 2026 unopposed - Dennis Tipsword Jr. (R)
2023–2027 · Won 2022 unopposed, 2024 by 37.9
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)