LaSalle County, Illinois: Industrial Catholic Metro county. In 2024, voted R+18%. Republican peak: R+53 in 1920.
Key facts
- 2024 presidential margin
- R+18MIT Election Lab
- Political typology
- Industrial Catholic MetroAkashic typology
- Population
- 108,7142024 5-year
- Median household income
- $73,0452024 5-year
- White (non-Hispanic)
- 85.5%2024 5-year
- Black
- 2.6%2024 5-year
- Hispanic / Latino
- 11.2%2024 5-year
- Peak Democratic margin
- D+19 in 1964MIT Election Lab
- Peak Republican margin
- R+53 in 1920MIT Election Lab
- Most similar
- Putnam County, IL · similarity 0.98
2024 results by precinct
2024 precinct map of LaSalle CountyPrecinct-level 2024 presidential results for LaSalle County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | +7.8% |
| 1896 | −17.2% |
| 1900 | −14.8% |
| 1904 | −33.2% |
| 1908 | −17.8% |
| 1912 | +11.0% |
| 1916 | −16.6% |
| 1920 | −52.8% |
| 1924 | −42.9% |
| 1928 | −7.1% |
| 1932 | +17.5% |
| 1936 | +9.2% |
| 1940 | +8.0% |
| 1944 | −12.9% |
| 1948 | −10.8% |
| 1952 | −21.3% |
| 1956 | −29.2% |
| 1960 | −0.0% |
| 1964 | +18.6% |
| 1968 | −6.0% |
| 1972 | −18.6% |
| 1976 | −4.1% |
| 1980 | −22.0% |
| 1984 | −14.2% |
| 1988 | +0.2% |
| 1992 | +14.4% |
| 1996 | +14.9% |
| 2000 | +4.5% |
| 2004 | −3.6% |
| 2008 | +11.1% |
| 2012 | −0.4% |
| 2016 | −14.4% |
| 2020 | −14.3% |
| 2024 | −18.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 21,029 | 30,717 | 52,508 | ||
| R | 22,442 | 30,113 | 53,687 | ||
| R | 19,543 | 26,689 | 49,743 | ||
| R | 23,073 | 23,256 | 47,405 | ||
| D | 27,443 | 21,872 | 50,185 | ||
| R | 24,263 | 26,101 | 50,729 | ||
| D | 23,355 | 21,276 | 46,007 | ||
| D | 21,643 | 15,299 | 42,491 | ||
| D | 23,276 | 16,078 | 49,931 | ||
| D | 22,271 | 22,166 | 44,650 | ||
| R | 20,532 | 27,388 | 48,139 | ||
| R | 16,818 | 27,323 | 47,835 | ||
| R | 23,105 | 25,114 | 48,865 | ||
| R | 21,405 | 31,190 | 52,687 | ||
| R | 22,940 | 26,054 | 51,610 | ||
| D | 30,923 | 21,216 | 52,139 | ||
| R | 27,532 | 27,552 | 55,125 | ||
| R | 18,318 | 33,461 | 51,862 | ||
| R | 21,321 | 32,857 | 54,277 | ||
| R | 19,666 | 24,453 | 44,440 | ||
| R | 21,489 | 28,179 | 51,878 | ||
| D | 29,704 | 25,296 | 55,399 | ||
| D | 26,926 | 22,240 | 51,201 | ||
| D | 27,500 | 19,179 | 47,587 | ||
| R | 20,807 | 24,039 | 45,228 | ||
| R | 6,216 | 21,417 | 35,417 | ||
| R | 6,626 | 23,751 | 32,434 | ||
| R | 14,625 | 20,662 | 36,459 | ||
| O | 7,036 | 4,858 | 19,784 | ||
| R | 7,589 | 11,159 | 20,074 | ||
| R | 5,628 | 11,967 | 19,095 | ||
| R | 8,671 | 11,781 | 20,956 | ||
| R | 8,108 | 11,548 | 20,047 | ||
| D | 9,365 | 7,957 | 18,033 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
24.6%
Irish
16.1%
English
9.6%
Italian
7.8%
Polish
6.2%
American
4.5%
French
2.6%
African American
2.1%
Multiple ancestry combinations reported; no single grouping above 1%.
Sample size too small to break out by ancestry reliably.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
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.
2024 ACS
Age distribution by sex
Median age: 42.2 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$73,045
LaSalle County ranks near the middle of US counties.
LaSalle County$73,045
Illinois$83,390
United States$80,734
LaSalle County ranks near the middle of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
13.9%
Children face moderate poverty.
Children under 1821.0%
Working age (18–64)12.4%
Seniors (65+)8.1%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
92.1%
speak English only
Spanish5.9%
Other Indo-European1.4%
Asian & Pacific Islander0.4%
Other languages0.2%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 60.8% of residents not counted as adherents by any reporting body.
LaSalle County, anchored by the Illinois River corridor and a mix of manufacturing towns and agricultural townships, has shifted roughly 20 points toward Republican presidential candidates over the past two decades, reflecting broader realignment among working-class Midwest counties.
Its margins are typically close. The Democratic margin reached nineteen points in 1964; the Republican margin reached fifty-three points in 1920. Between 2020 and 2024 the county moved four points toward the Republican candidate; the 2024 margin was eighteen points.
Its demographics sit near national norms: a 86% non-Hispanic-white share, a median household income of $73,045, and a 14% poverty rate. The county's voting pattern over the last decade is most similar to that of Putnam County and Lake County.
Most similar counties
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.
LaSalle County, Illinois. Akashic. https://akashic.app/county/17099/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More industrial catholic metro counties
Frequently asked questions
How did LaSalle County, Illinois vote in 2024?
In 2024, LaSalle County, Illinois voted Republican by 18.5 points (R+18), carried by the Republican candidate. Out of 52,508 votes cast, 21,029 went Democratic and 30,717 went Republican.
What is LaSalle County, Illinois's political typology?
Akashic places LaSalle County, Illinois in the "Industrial Catholic Metro" typology — Mid-size industrial metros with Catholic ethnic roots — among the most competitive, swing-prone ground in the country. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 10 times, Republican 23 times, and other 1 times.
When did LaSalle County, Illinois last vote Democratic?
The most recent presidential election in which LaSalle County, Illinois voted Democratic was 2008.
How many people live in LaSalle County, Illinois?
LaSalle County, Illinois has a population of 108,714 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in LaSalle County, Illinois?
Median household income in LaSalle County, Illinois is $73,045 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of LaSalle County, Illinois?
Akashic tracks 38 presidential elections in LaSalle County, Illinois from 1876 to 2024. Of those, 10 went Democratic and 23 went Republican. The county's typology — "Industrial Catholic Metro" — captures where that record, its demographics, and its recent swing place it among American communities.