Peoria County, Illinois: Industrial Catholic Metro county. In 2024, voted D+5%. Republican peak: R+44 in 1924.
Key facts
- 2024 presidential margin
- D+5MIT Election Lab
- Political typology
- Industrial Catholic MetroAkashic typology
- Population
- 179,6452024 5-year
- Median household income
- $65,1082024 5-year
- White (non-Hispanic)
- 67.3%2024 5-year
- Black
- 17.3%2024 5-year
- Hispanic / Latino
- 6.0%2024 5-year
- Peak Democratic margin
- D+30 in 1936MIT Election Lab
- Peak Republican margin
- R+44 in 1924MIT Election Lab
- Most similar
- Sandoval County, NM · similarity 0.95
2024 results by precinct
2024 precinct map of Peoria CountyPrecinct-level 2024 presidential results for Peoria 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 | +4.9% |
| 1896 | −7.1% |
| 1900 | −6.1% |
| 1904 | −32.2% |
| 1908 | −9.4% |
| 1912 | +26.2% |
| 1916 | +0.3% |
| 1920 | −40.6% |
| 1924 | −43.8% |
| 1928 | −14.3% |
| 1932 | +19.5% |
| 1936 | +30.2% |
| 1940 | +9.2% |
| 1944 | −2.0% |
| 1948 | −6.0% |
| 1952 | −18.3% |
| 1956 | −25.6% |
| 1960 | −7.6% |
| 1964 | +17.4% |
| 1968 | −8.2% |
| 1972 | −29.6% |
| 1976 | −14.5% |
| 1980 | −23.4% |
| 1984 | −10.6% |
| 1988 | −3.2% |
| 1992 | +9.1% |
| 1996 | +8.6% |
| 2000 | +2.9% |
| 2004 | +0.1% |
| 2008 | +13.9% |
| 2012 | +4.4% |
| 2016 | +3.1% |
| 2020 | +6.3% |
| 2024 | +4.6% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 40,564 | 36,896 | 79,138 | ||
| D | 43,578 | 38,252 | 83,973 | ||
| D | 38,060 | 35,633 | 79,102 | ||
| D | 40,209 | 36,774 | 78,411 | ||
| D | 45,906 | 34,579 | 81,704 | ||
| D | 41,121 | 41,051 | 82,771 | ||
| D | 38,604 | 36,398 | 76,812 | ||
| D | 37,383 | 30,990 | 74,102 | ||
| D | 38,099 | 30,718 | 81,328 | ||
| R | 35,253 | 37,605 | 73,230 | ||
| R | 36,830 | 45,607 | 82,899 | ||
| R | 28,276 | 47,815 | 83,510 | ||
| R | 34,606 | 46,526 | 82,123 | ||
| R | 27,264 | 50,324 | 78,032 | ||
| R | 30,937 | 37,021 | 74,105 | ||
| D | 47,360 | 33,327 | 80,687 | ||
| R | 39,061 | 45,529 | 84,676 | ||
| R | 30,145 | 50,888 | 81,141 | ||
| R | 33,955 | 49,245 | 83,339 | ||
| R | 31,026 | 35,018 | 66,352 | ||
| R | 32,837 | 34,171 | 67,251 | ||
| D | 42,009 | 34,911 | 77,221 | ||
| D | 48,063 | 25,425 | 74,865 | ||
| D | 37,605 | 25,166 | 63,716 | ||
| R | 23,150 | 31,024 | 54,913 | ||
| R | 6,343 | 25,243 | 43,112 | ||
| R | 9,453 | 24,541 | 37,182 | ||
| D | 18,718 | 18,615 | 38,395 | ||
| O | 8,364 | 2,594 | 22,020 | ||
| R | 8,898 | 10,828 | 20,635 | ||
| R | 5,697 | 11,868 | 19,135 | ||
| R | 9,433 | 10,700 | 20,647 | ||
| R | 9,068 | 10,486 | 19,898 | ||
| D | 8,053 | 7,266 | 15,924 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
19.8%
Irish
12.1%
English
11.0%
American
4.0%
Italian
3.0%
Polish
1.9%
Scottish
1.9%
African American
13.8%
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. 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: 38.1 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
$65,108
Peoria County ranks near the middle of US counties.
Peoria County$65,108
Illinois$83,390
United States$80,734
Peoria 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
15.7%
Children face moderate poverty.
Children under 1820.5%
Working age (18–64)14.5%
Seniors (65+)10.3%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
91.1%
speak English only
Spanish3.1%
Asian & Pacific Islander2.5%
Other Indo-European2.3%
Other languages1.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 56.8% of residents not counted as adherents by any reporting body.
Anchored by the city of Peoria, this county along the Illinois River has shifted noticeably from its earlier competitive standing, with the 2024 presidential margin landing at D+4.6 in a metro long watched as a national bellwether.
Its margins are typically close. The Democratic margin reached thirty points in 1936; the Republican margin reached forty-four points in 1924. Between 2020 and 2024 the county moved two points toward the Republican candidate; the 2024 margin was five points.
Its demographics sit near national norms: a 67% non-Hispanic-white share, a median household income of $65,108, and a 16% poverty rate. The county's voting pattern over the last decade is most similar to that of Sandoval County and St. Joseph 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.
Peoria County, Illinois. Akashic. https://akashic.app/county/17143/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More industrial catholic metro counties
Frequently asked questions
How did Peoria County, Illinois vote in 2024?
In 2024, Peoria County, Illinois voted Democratic by 4.6 points (D+5), carried by the Democratic candidate. Out of 79,138 votes cast, 40,564 went Democratic and 36,896 went Republican.
What is Peoria County, Illinois's political typology?
Akashic places Peoria 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 15 times, Republican 18 times, and other 1 times.
When did Peoria County, Illinois last vote Republican?
The most recent presidential election in which Peoria County, Illinois voted Republican was 1988.
How many people live in Peoria County, Illinois?
Peoria County, Illinois has a population of 179,645 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Peoria County, Illinois?
Median household income in Peoria County, Illinois is $65,108 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Peoria County, Illinois?
Akashic tracks 38 presidential elections in Peoria County, Illinois from 1876 to 2024. Of those, 15 went Democratic and 18 went Republican. The county's typology — "Industrial Catholic Metro" — captures where that record, its demographics, and its recent swing place it among American communities.