Jo Daviess County, Illinois

2024 results by precinct

28 precincts · 12,414 votes cast

Trump · R+17

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	R	−16.8%	5,051	7,136	12,414
2020	R	−16.4%	5,109	7,166	12,525
2016	R	−14.6%	4,462	6,121	11,334
2012	D	+1.2%	5,667	5,534	11,429
2008	D	+10.5%	6,403	5,170	11,750
2004	R	−7.4%	5,311	6,174	11,584
2000	R	−7.0%	4,585	5,304	10,322
1996	D	+2.8%	4,171	3,915	9,306
1992	R	−2.0%	4,044	4,249	10,454
1988	R	−8.6%	4,141	4,923	9,137
1984	R	−27.2%	3,348	5,877	9,302
1980	R	−28.0%	2,678	5,186	8,971
1976	R	−15.6%	3,979	5,478	9,628
1972	R	−26.9%	3,318	5,763	9,097
1968	R	−24.8%	3,228	5,563	9,408
1964	D	+2.2%	4,818	4,607	9,425
1960	R	−17.5%	4,293	6,111	10,417
1956	R	−39.8%	2,906	6,762	9,686
1952	R	−42.7%	2,858	7,132	10,003
1948	R	−24.3%	3,220	5,299	8,570
1944	R	−32.3%	3,298	6,465	9,797
1940	R	−30.6%	3,864	7,285	11,192
1936	R	−4.9%	5,079	5,619	10,950
1932	D	+9.6%	5,497	4,520	10,177
1928	R	−24.1%	3,856	6,333	10,283
1924	R	−35.1%	1,477	4,864	9,659
1920	R	−56.2%	1,604	6,098	7,997
1916	R	−23.6%	3,505	5,775	9,622
1912	D	+18.2%	2,226	1,233	5,460
1908	R	−14.3%	2,310	3,132	5,739
1904	R	−33.3%	1,598	3,388	5,368
1900	R	−14.7%	2,543	3,444	6,143
1896	R	−19.5%	2,391	3,594	6,158
1892	D	+2.0%	2,793	2,680	5,740
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%

Sample size too small to break out by ancestry reliably.

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. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 51.5 in this county, 39.1 nationally

Male

Age

Female

1.6%

85+

1.8%

4.2%

75–84

5.5%

8.4%

65–74

8.5%

7.7%

55–64

7.9%

5.7%

45–54

5.7%

5.2%

35–44

4.9%

4.6%

25–34

4.3%

3.3%

18–24

2.6%

7.4%

5–17

6.9%

2.0%

1.9%

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

Median household income

2024 inflation-adjusted dollars

$73,993

Jo Daviess County ranks near the middle of US counties.

Jo Daviess County$73,993

Illinois$83,390

United States$80,734

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

Poverty rate

All persons below federal poverty line

7.8%

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

Catholic & Orthodox

21.9%

Mainline Protestant

10.1%

Methodist

8.2%

Other Christian

1.7%

Non-Christian

0.4%

Pentecostal & Holiness

0.3%

Source · 2020 US Religion Census. Remaining 57.4% of residents not counted as adherents by any reporting body.

Jo Daviess County, Illinois's northwestern corner, has shifted steadily toward Republican margins over the past two decades, posting R+16.8 in 2024 despite a modest population of roughly 22,000 spread across river towns and farmland.

The county's recent history is a story of close margins. The Democratic margin reached eighteen points in 1912; the Republican margin reached fifty-six points in 1920. Most other elections have been decided by single-digit points.

Jo Daviess County's demographics — a population of 21,851, a 94% non-Hispanic-white share, a median household income of $73,993 — 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 Houston County and Sandusky County.

Most similar counties

Jo Daviess County delivered a near-tie in 2024.