State Senate District 55 State Senate District (IL) — Elections 1876–2024

Illinois 55th State Senate District, Illinois: Republican loyalist district. In 2024, voted R+32%. Republican peak: R+32 in 2024.

Key facts

2024 presidential margin: R+32MIT Election Lab
Political archetype: Republican loyalistAkashic typology
Population: 329,9342024 5-year
Median household income: $72,7112024 5-year
White (non-Hispanic): 85.6%2024 5-year
Black: 6.5%2024 5-year
Hispanic / Latino: 3.6%2024 5-year
Peak Democratic margin: D+26 in 1964MIT Election Lab
Peak Republican margin: R+32 in 2024MIT Election Lab

2024 results by constituent county

11 counties · 1 D · 10 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	R	−32.1%	54,049	106,619	163,771
2020	R	−30.9%	56,356	108,695	169,127
2016	R	−31.0%	50,058	99,395	159,322
2012	R	−13.9%	63,088	84,068	150,929
2008	R	−0.0%	78,304	78,342	159,380
2004	R	−8.8%	70,051	83,747	154,924
2000	R	−2.9%	67,118	71,310	142,165
1996	D	+9.1%	64,350	52,318	131,948
1992	D	+16.1%	72,210	48,030	150,014
1988	R	−0.5%	66,626	67,329	134,672
1984	R	−18.5%	58,023	84,419	142,903
1980	R	−17.7%	54,576	79,306	140,034
1976	D	+4.5%	73,050	66,656	141,392
1972	R	−19.5%	55,340	82,310	138,075
1968	R	−4.6%	57,355	63,717	137,779
1964	D	+26.1%	86,145	50,462	136,607
1960	R	−1.1%	69,912	71,517	141,598
1956	R	−7.4%	61,546	71,367	133,067
1952	R	−3.3%	65,314	69,817	135,317
1948	D	+6.8%	58,935	51,378	111,479
1944	R	−1.3%	58,461	59,972	119,421
1940	D	+3.9%	72,341	66,801	140,406
1936	D	+14.8%	68,787	50,432	123,641
1932	D	+25.5%	67,446	39,513	109,692
1928	R	−10.2%	43,787	53,840	98,445
1924	R	−11.8%	30,144	40,358	86,535
1920	R	−26.2%	24,705	44,691	76,408
1916	D	+0.3%	42,177	41,930	87,593
1912	D	+17.5%	20,993	12,745	46,998
1908	R	−0.4%	23,414	23,621	49,842
1904	R	−11.8%	17,701	22,953	44,452
1900	D	+2.2%	23,126	22,089	46,410
1896	D	+4.9%	22,788	20,638	44,064
1892	D	+5.4%	18,157	16,095	38,158
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

28.9%

Irish

11.7%

English

11.5%

American

6.5%

Italian

3.2%

Polish

2.1%

French

2.0%

Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 40.8 in this county, 39.1 nationally

Male

Age

Female

0.9%

85+

1.5%

2.4%

75–84

3.1%

5.4%

65–74

5.8%

6.9%

55–64

6.9%

6.0%

45–54

5.9%

6.5%

35–44

6.2%

6.3%

25–34

6.0%

4.3%

18–24

4.1%

8.3%

5–17

7.9%

2.8%

2.6%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$72,711

State Senate District 55 ranks near the middle of US counties.

State Senate District 55$72,711

Illinois$83,390

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

11.8%

Child poverty is below the national average.

Children under 1814.3%

Working age (18–64)11.1%

Seniors (65+)10.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

96.6%

speak English only

Spanish2.0%

Other Indo-European0.9%

Asian & Pacific Islander0.4%

Other languages0.2%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

16.6%

Other Christian

10.0%

Baptist

9.4%

Mainline Protestant

7.1%

Methodist

4.1%

Pentecostal & Holiness

2.3%

Non-Christian

0.8%

Source · 2020 US Religion Census. Remaining 49.5% of residents not counted as adherents by any reporting body.

With a 2024 presidential margin of R+50.5, this downstate district ranks among the state's most reliably one-sided constituencies, where demographic and geographic patterns have produced consistent, lopsided results across cycles.

The Republican margin in Illinois 55th State Senate District reached its widest at thirty-two points in 2024. The margin in 2024 was thirty-two points, in line with the district's deep historical pattern.

Its loyalty is rooted in its place. Median household income of $72,711, a 86% non-Hispanic-white share, and a population of 329,934 together describe a district whose political habits are deeply settled.

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Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

State Senate District 55, Illinois. Akashic. https://akashic.app/sld-upper/17055/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did State Senate District 55, Illinois vote in 2024?

In 2024, State Senate District 55, Illinois voted Republican by 32.1 points (R+32), carried by the Republican candidate. Out of 163,771 votes cast, 54,049 went Democratic and 106,619 went Republican.

What is State Senate District 55, Illinois's political archetype?

Akashic classifies State Senate District 55, Illinois as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 13 times, Republican 21 times, and other 0 times.

When did State Senate District 55, Illinois last vote Democratic?

The most recent presidential election in which State Senate District 55, Illinois voted Democratic was 1996.

How many people live in State Senate District 55, Illinois?

State Senate District 55, Illinois has a population of 329,934 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in State Senate District 55, Illinois?

Median household income in State Senate District 55, Illinois is $72,711 — below the national median of $80,734. The Illinois state median is $83,390.

What is the political history of State Senate District 55, Illinois?

Akashic tracks 38 presidential elections in State Senate District 55, Illinois from 1876 to 2024. Of those, 13 went Democratic and 21 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.

Illinois 55th State Senate District has voted Republican in seven straight presidential cycles.

Key facts

Demographics

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Frequently asked questions