Warren County, Illinois

2024 results by precinct

28 precincts · 7,447 votes cast

Trump · R+25

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	R	−25.1%	2,711	4,579	7,447
2020	R	−20.0%	3,090	4,676	7,924
2016	R	−16.5%	2,987	4,275	7,807
2012	D	+5.4%	4,044	3,618	7,818
2008	D	+8.1%	4,286	3,637	8,029
2004	R	−6.3%	3,938	4,474	8,457
2000	R	−4.9%	3,524	3,899	7,631
1996	D	+7.3%	3,500	2,974	7,250
1992	D	+4.0%	3,661	3,325	8,446
1988	R	−11.7%	3,617	4,584	8,254
1984	R	−27.5%	3,318	5,846	9,193
1980	R	−32.1%	2,756	5,667	9,071
1976	R	−20.5%	3,808	5,822	9,826
1972	R	−40.5%	2,969	7,021	10,008
1968	R	−28.5%	3,085	5,877	9,795
1964	R	−5.9%	4,670	5,258	9,931
1960	R	−30.6%	3,835	7,221	11,066
1956	R	−43.3%	2,996	7,580	10,582
1952	R	−45.9%	2,973	8,020	11,004
1948	R	−33.1%	3,367	6,738	10,179
1944	R	−28.6%	3,926	7,085	11,050
1940	R	−22.9%	4,878	7,790	12,735
1936	R	−12.1%	5,409	6,919	12,465
1932	D	+1.0%	5,610	5,498	11,258
1928	R	−48.7%	2,681	7,915	10,753
1924	R	−42.1%	2,440	6,912	10,623
1920	R	−44.8%	2,236	6,309	9,090
1916	R	−16.1%	4,498	6,294	11,145
1912	D	+19.5%	2,080	915	5,966
1908	R	−15.8%	2,327	3,283	6,066
1904	R	−34.5%	1,559	3,563	5,808
1900	R	−17.6%	2,501	3,618	6,351
1896	R	−12.9%	2,604	3,394	6,144
1892	R	−8.0%	2,294	2,725	5,376
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.

American

100.0%

Polish

0.7%

African American

2.2%

Multiple ancestry combinations reported; no single grouping above 1%.

American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.

Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 38.5 in this county, 39.1 nationally

Male

Age

Female

1.1%

85+

1.9%

2.6%

75–84

2.8%

5.7%

65–74

5.9%

6.3%

55–64

6.8%

5.5%

45–54

5.6%

5.2%

35–44

5.3%

5.8%

25–34

4.6%

6.3%

18–24

6.0%

9.2%

5–17

8.4%

2.4%

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

Median household income

2024 inflation-adjusted dollars

$67,385

Warren County ranks near the middle of US counties.

Warren County$67,385

Illinois$83,390

United States$80,734

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

Poverty rate

All persons below federal poverty line

14.6%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

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

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Other Christian

11.9%

Catholic & Orthodox

9.4%

Methodist

7.8%

Mainline Protestant

3.9%

Baptist

0.8%

Pentecostal & Holiness

0.2%

Source · 2020 US Religion Census. Remaining 66.0% of residents not counted as adherents by any reporting body.

Warren County's population has declined steadily as agriculture consolidates, leaving a smaller, older, and more reliably Republican electorate. In 2024 the GOP presidential margin reached 25 points, up sharply from the single-digit gaps of two decades ago.

The county's recent history is a story of close margins. The Democratic margin reached twenty points in 1912; the Republican margin reached forty-nine points in 1928. Most other elections have been decided by single-digit points.

Warren County's demographics — a population of 16,447, a 83% non-Hispanic-white share, a median household income of $67,385 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Shiawassee County and Juneau County.

Most similar counties

Warren County delivered a near-tie in 2024.