Illinois House of Representatives seat · lines in effect since 2022

Illinois Representative District 110

A district of about 106,000 people, 17% of adults with a bachelor's degree. It votes R+57.1 relative to the nation for president.

Blaine Wilhour (R) · since Nov 6, 2018Next election Nov 7, 2028The 2026 race →

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.

R+57.1118th most
Democratic

Most DemocraticMost Republican60th seat · the majority lineDistrict 110

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+22.6	No race	R+44.3
Governor	No race	R+29.5	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 110.

Adults with a bachelor's degree17% 3rd pct · 115th of 118 in IL

13%86%

Lower than 97% of seats.

White adults without a degree75% 99th pct · 2nd of 118 in IL

3%76%

Higher than 99% of seats.

Hispanic residents2% 5th pct · 112th of 118 in IL

2%82%

Lower than 95% of seats.

Black residents3% 26th pct · 88th of 118 in IL

1%70%

Lower than 74% of seats.

Asian residents1% 7th pct · 110th of 118 in IL

0%25%

Lower than 93% of seats.

People per square mile39 3rd pct · 114th of 118 in IL

2834K

Less dense than 97% 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 116
IllinoisR+56.1Held R District 117
IllinoisR+54.1Held R District 102
21% college gradsR+55.0Held R District 107
22% college gradsR+53.3Held 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.

Blaine Wilhour (R)
2023– · Won 2022 unopposed, 2024 unopposed, 2026 unopposed

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)