Illinois State Senate seat · lines in effect since 2022
Illinois Legislative District 16
A district of about 201,000 people, 27% Hispanic and 46% Black, 19% of adults with a bachelor's degree. It votes D+50.2 relative to the nation for president.
2024 election
Nov 5, 2024- Willie Preston (D) · won100.0%
Unopposed.
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
19 races since 1970; the seat changed party 1 time. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Willie Preston (D) | — | Unopposed |
| 2022 | Willie Preston (D) | — | Unopposed |
| Lines first used in 2012 | |||
| 2020 | Jacqueline Collins (D) | — | Unopposed |
| 2016 | Jacqueline Collins (D) | — | Unopposed |
| 2012 | Jacqueline Collins (D) | — | Unopposed |
| Lines first used in 2002 | |||
| 2010 | Jacqueline Collins (D) | — | Unopposed |
| 2006 | Jacqueline Collins (D) | Matthew M. Szydagis (R) | 84.3 |
| 2002 | Jacqueline Collins (D) | Robert J. Pettis (R) | 77.7 |
| Lines first used in 1992 | |||
| 1998 | Donne E. Trotter (D) | James Gutierrez (R) | 81.0 |
| 1996 | Donne E. Trotter (D) | — | Unopposed |
| 1992 | Donne E. Trotter (D) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | Ethel Skyles Alexander (D) | — | Unopposed |
| 1986 special | Ethel Skyles Alexander (D) | — | Unopposed |
| 1984 | Charles Chew (D) | — | Unopposed |
| 1982 | Charles Chew (D) | — | Unopposed |
| Lines first used in 1972 | |||
| 1978 | Robert J. Egan (D) | William K. Dammeier (R) | 15.3 |
| 1974 | Robert J. Egan (D)Flip | Edward T. Scholl (R) | 4.4 |
| 1972 | Howard T. Scholl (R) | Robert J. Egan (D) | 13.4 |
| Lines first used in 1962 | |||
| 1970 | Robert J. Egan (D) | Walter P. Hoffelder (R) | 13.6 |
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 16
The state's districts in other chambers that share residents with this one, and the share of District 16's area in each.
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 16.
Lowest of 59 seats.
Lower than 78% of seats.
Higher than 81% of seats.
Higher than 95% of seats.
Lower than 76% of seats.
Denser than 81% 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 423% Hispanic · 45% BlackD+56.4Not up in 2026District 14
46% Black · 30% college gradsD+41.0Held DDistrict 15
49% Black · 25% college gradsD+50.2Held DDistrict 17
66% Black · 26% college gradsD+62.6Held 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