state senate districtIllinois 40th State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+6.5
2008D+21.2
2012D+15.5
2016D+9.5
2020D+7.1
2024D+0.3
net swing · 2004→2024R+6.2D+6.5 → D+0.3
vs. U.S. · 2024D+1.8D+0.3 vs R+1.5
presidential returns
2024 turnout 59.7% of 158,596 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
46,522
46,213
1,888
94,623
158,596
59.7%
2020
52,641
45,576
1,791
100,008
156,216†
64.0%
2016
48,283
39,410
5,355
93,048
152,230†
61.1%
2012
51,371
37,368
1,631
90,370
146,928†
61.5%
2008
56,516
36,515
1,532
94,563
143,954†
65.7%
2004
45,751
40,111
272
86,134
140,979†
61.1%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupIL SD 40IllinoisUnited States
German15.6%16.1%12.5%
Irish12.0%10.6%9.4%
Polish9.3%6.0%2.2%
Italian7.4%5.4%4.8%
English5.4%6.9%9.5%
American2.6%3.3%5.3%
Swedish1.3%1.5%—
Dutch1.0%——
African American†20.4%12.1%9.9%
African4.4%0.5%0.5%
Nigerian0.7%0.3%0.2%
Mexican11.5%14.4%11.3%
Puerto Rican1.0%1.7%1.8%
Guatemalan0.2%0.3%0.5%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
IL SD 40
Illinois
United States
Median age
38.3
39.1
39.1
Age 18–24
9.0%
9.1%
9.2%
Age 65 and older
15.5%
16.9%
17.2%
Household economy
Measure
IL SD 40
Illinois
United States
Median household income
$75,271
$83,390
$84,427
Poverty rate
13.1%
11.8%
12.5%
Bachelor's degree or higher (25+)
36.5%
37.9%
35.6%
Languages at home
Measure
IL SD 40
Illinois
United States
Speaks a non-English language at home
24.0%
24.1%
22.3%
Spanish
14.5%
14.0%
13.6%
Russian, Polish, or other Slavic
2.3%
2.5%
0.7%
Other Indo-European
2.7%
2.6%
2.0%
Other Asian & Pacific Island
1.0%
1.0%
1.1%
Religious landscape
Measure
IL SD 40
Illinois
United States
Catholic
—
24.2%
18.6%
Evangelical Protestant
—
11.7%
16.5%
Unclaimed / not counted
—
49.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Illinois 40th State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+6.5%
2008
+21.2%
2012
+15.5%
2016
+9.5%
2020
+7.1%
2024
+0.3%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
49.2%Harris46,522
48.8%Trump46,213
2.0%
D+0.3
R+6.7
D+1.8
94,623
D
52.6%Biden52,641
45.6%Trump45,576
1.8%
D+7.1
R+2.5
D+2.6
100,008
D
51.9%Clinton48,283
42.4%Trump39,410
5.8%
D+9.5
R+6.0
D+7.4
93,048
D
56.8%Obama51,371
41.4%Romney37,368
1.8%
D+15.5
R+5.7
D+11.6
90,370
D
59.8%Obama56,516
38.6%McCain36,515
1.6%
D+21.2
D+14.6
D+13.9
94,563
D
53.1%Kerry45,751
46.6%Bush40,111
0.3%
D+6.5
—
D+9.0
86,134
current representation
Current officeholders
DPatrick JoyceState Senate · 40
State legislative officeholder from OpenStates nightly current-legislator data.
With a D+64.3 margin in 2024, this Chicago-area district ranks among the most heavily concentrated Democratic-voting state senate districts in Illinois, reflecting dense urban population patterns that consistently produce outsized partisan differentials.
Across the recorded series it reached a Democratic high of 21.2 points in 2008. Between 2020 and 2024 the district moved 6.7 points toward the Republican candidate; the 2024 margin was 0.3 points.
A population of 217,318, a 55% non-Hispanic-white share, and a median household income of $75,271 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 18 and State Senate District 43.
Akashic
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Illinois 40th State Senate District. Akashic. https://akashic.app/sld-upper/17040/. Accessed May 20, 2026. License: CC BY 4.0.
How did Illinois 40th State Senate District vote in 2024?
In 2024, Illinois 40th State Senate District voted a near-tie (D+0.3), carried by the Democratic candidate. Out of 94,623 votes cast, 46,522 went Democratic and 46,213 went Republican.
How many people live in Illinois 40th State Senate District?
Illinois 40th State Senate District has a population of 217,318 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 40th State Senate District?
Median household income in Illinois 40th State Senate District is $75,271 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 40th State Senate District?
Akashic tracks 6 presidential elections in Illinois 40th State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
