Illinois House of Representatives seat · lines in effect since 2022

Illinois Representative District 107

A district of about 96,000 people, 22% of adults with a bachelor's degree. It votes R+53.3 relative to the nation for president.

Brad Halbrook (R) · since Nov 6, 2012Next 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+53.3114th most
Democratic

Most DemocraticMost Republican60th seat · the majority lineDistrict 107

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+41.0	No race	R+44.5
Governor	No race	R+37.2	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 107.

Adults with a bachelor's degree22% 13th pct · 103rd of 118 in IL

13%86%

Lower than 87% of seats.

White adults without a degree74% 97th pct · 4th of 118 in IL

3%76%

Higher than 97% of seats.

Hispanic residents2% 3rd pct · 114th of 118 in IL

2%82%

Lower than 97% of seats.

Black residents1% 0th pct · 118th of 118 in IL

1%70%

Lowest of 118 seats.

Asian residents1% 15th pct · 100th of 118 in IL

0%25%

Lower than 85% of seats.

People per square mile47 7th pct · 110th of 118 in IL

2834K

Less dense than 93% 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 102
21% college gradsR+55.0Held R District 117
IllinoisR+54.1Held R District 116
IllinoisR+56.1Held R District 100
24% college gradsR+50.0Held 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.

Republican (R)
2027– · Won 2026 unopposed
Brad Halbrook (R)
2023–2027 · Won 2022 unopposed, 2024 unopposed

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