99chambers

Illinois House of Representatives seat · lines in effect since 2022

Illinois Representative District 12

A district of about 103,000 people, 86% of adults with a bachelor's degree. It votes D+63.1 relative to the nation for president.

Margaret Croke (D) · since Nov 3, 2020Next 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.

D+63.116th most
Democratic
Most DemocraticMost Republican60th seat · the majority lineDistrict 12

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.

20222026
Illinois House of RepresentativesD+60.4D+71.4

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 118 seats. Small marks are other seats in Illinois. The black marker is District 12.

Adults with a bachelor's degree86% 100th pct · 1st of 118 in IL

Highest of 118 seats.

White adults without a degree9% 8th pct · 109th of 118 in IL

Lower than 92% of seats.

Hispanic residents8% 26th pct · 87th of 118 in IL

Lower than 74% of seats.

Black residents4% 37th pct · 75th of 118 in IL

Lower than 63% of seats.

Asian residents8% 73rd pct · 33rd of 118 in IL

Higher than 73% of seats.

People per square mile33,850 100th pct · 1st of 118 in IL

Densest of 118 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 11
82% college gradsD+73.2Held DDistrict 18
73% college gradsD+69.2Held DDistrict 13
66% college gradsD+78.2Held DDistrict 58
73% college gradsD+42.0Held 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 2022.

  1. Paul Kendrick (D)
    2027– · Won 2026 by 71.4
  2. Margaret Croke (D)
    2023–2027 · Won 2022 by 60.4, 2024 unopposed

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