Illinois State Senate seat · lines in effect since 2022
Illinois Legislative District 31
A district of about 201,000 people, 30% Hispanic, 38% of adults with a bachelor's degree. It votes D+19.6 relative to the nation for president.
2024 election
Nov 5, 2024- Mary Edly-Allen (D) · won58.2%
- Ashley Jensen (R)41.8%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 59 seats
Every Illinois State Senate 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 election for this seat
18 races since 1970; the seat changed party 4 times. District numbers are redrawn after each census: each group is one set of lines.
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 31
The state's districts in other chambers that share residents with this one, and the share of District 31's area in each.
- U.S. House
- IL-10 100%
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 | |
|---|---|---|---|---|
| President | D+16.6 | No race | D+22.3 | D+17.9 |
| U.S. Senate | D+7.8 | No race | D+15.7 | No race |
| Governor | No race | D+8.4 | No race | 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 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 59 seats. Small marks are other seats in Illinois. The black marker is District 31.
Higher than 55% of seats.
Lower than 53% of seats.
Higher than 83% of seats.
Higher than 57% of seats.
Higher than 57% of seats.
Less dense than 55% 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 2541% Hispanic · 35% college gradsD+18.9Not up in 2026District 43
34% Hispanic · 26% college gradsD+14.5Not up in 2026District 10
26% Hispanic · 40% college gradsD+12.1Not up in 2026District 49
43% college gradsD+11.6Not up in 2026
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