Marion County, Illinois: Appalachian Realigners county. In 2024, voted R+49%. Republican peak: R+49 in 2024.
Key facts
- 2024 presidential margin
- R+49MIT Election Lab
- Political typology
- Appalachian RealignersAkashic typology
- Population
- 37,0002024 5-year
- Median household income
- $61,2402024 5-year
- White (non-Hispanic)
- 89.9%2024 5-year
- Black
- 3.0%2024 5-year
- Hispanic / Latino
- 2.2%2024 5-year
- Peak Democratic margin
- D+27 in 1964MIT Election Lab
- Peak Republican margin
- R+49 in 2024MIT Election Lab
- Most similar
- Randolph County, IL · similarity 1.00
2024 results by precinct
2024 precinct map of Marion CountyPrecinct-level 2024 presidential results for Marion 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 | +6.6% |
| 1896 | +14.2% |
| 1900 | +9.6% |
| 1904 | −10.4% |
| 1908 | +7.1% |
| 1912 | +24.2% |
| 1916 | +9.7% |
| 1920 | −17.8% |
| 1924 | −8.4% |
| 1928 | −21.8% |
| 1932 | +26.0% |
| 1936 | +12.9% |
| 1940 | +13.7% |
| 1944 | +3.4% |
| 1948 | +6.4% |
| 1952 | −7.4% |
| 1956 | −11.7% |
| 1960 | −9.9% |
| 1964 | +27.3% |
| 1968 | −2.2% |
| 1972 | −21.3% |
| 1976 | +5.9% |
| 1980 | −21.3% |
| 1984 | −19.5% |
| 1988 | −0.6% |
| 1992 | +20.7% |
| 1996 | +11.4% |
| 2000 | −1.0% |
| 2004 | −10.0% |
| 2008 | −2.0% |
| 2012 | −19.1% |
| 2016 | −43.8% |
| 2020 | −46.6% |
| 2024 | −49.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 4,116 | 12,409 | 16,762 | ||
| R | 4,524 | 12,678 | 17,494 | ||
| R | 4,369 | 11,859 | 17,098 | ||
| R | 6,225 | 9,248 | 15,820 | ||
| R | 8,345 | 8,691 | 17,364 | ||
| R | 7,694 | 9,413 | 17,224 | ||
| R | 8,068 | 8,240 | 16,663 | ||
| D | 7,792 | 5,999 | 15,763 | ||
| D | 9,669 | 5,764 | 18,883 | ||
| R | 8,592 | 8,695 | 17,373 | ||
| R | 7,599 | 11,300 | 18,945 | ||
| R | 6,990 | 10,969 | 18,678 | ||
| D | 9,834 | 8,729 | 18,720 | ||
| R | 6,968 | 10,755 | 17,754 | ||
| R | 7,737 | 8,134 | 17,649 | ||
| D | 12,363 | 7,060 | 19,423 | ||
| R | 9,116 | 11,121 | 20,250 | ||
| R | 8,551 | 10,813 | 19,385 | ||
| R | 9,317 | 10,804 | 20,140 | ||
| D | 8,878 | 7,798 | 16,884 | ||
| D | 10,079 | 9,408 | 19,640 | ||
| D | 13,807 | 10,461 | 24,476 | ||
| D | 10,820 | 8,321 | 19,446 | ||
| D | 10,791 | 6,276 | 17,380 | ||
| R | 5,823 | 9,110 | 15,052 | ||
| R | 4,768 | 5,889 | 13,381 | ||
| R | 4,351 | 6,620 | 12,715 | ||
| D | 7,892 | 6,438 | 14,964 | ||
| D | 3,493 | 1,586 | 7,892 | ||
| D | 4,001 | 3,435 | 7,963 | ||
| R | 2,490 | 3,190 | 6,751 | ||
| D | 3,928 | 3,221 | 7,340 | ||
| D | 3,835 | 2,870 | 6,782 | ||
| D | 2,709 | 2,324 | 5,827 | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — |
Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
24.2%
English
13.6%
Irish
12.3%
American
8.0%
Polish
2.3%
Italian
1.8%
Scottish
1.2%
African American
2.4%
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: 41.5 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
$61,240
Marion County ranks near the middle of US counties.
Marion County$61,240
Illinois$83,390
United States$80,734
Marion 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
15.4%
Children face moderate poverty.
Children under 1819.5%
Working age (18–64)14.7%
Seniors (65+)7.6%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
97.5%
speak English only
Spanish1.5%
Asian & Pacific Islander0.5%
Other Indo-European0.4%
Other languages0.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 48.8% of residents not counted as adherents by any reporting body.
Marion County, anchored by the small city of Centralia, has shifted sharply rightward over the past two decades; its 2024 presidential margin of R+49.5 reflects a pattern common to rural southern Illinois counties with declining manufacturing employment.
The unraveling was not abrupt. The Democratic margin peaked at twenty-seven points in 1964 and narrowed across the late twentieth century. The 2000 election carried the county to the Republican party for the first time in many years, by one point. Between 2020 and 2024 the county moved three points toward the Republican candidate; the 2024 margin was forty-nine points.
The economic context is severe: a median household income of $61,240 — among the lowest at this geographic scale — and a 15% poverty rate. The county's voting pattern over the last decade is most similar to that of Randolph County and Jersey 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.
Marion County, Illinois. Akashic. https://akashic.app/county/17121/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More appalachian realigners counties
Frequently asked questions
How did Marion County, Illinois vote in 2024?
In 2024, Marion County, Illinois voted Republican by 49.5 points (R+49), carried by the Republican candidate. Out of 16,762 votes cast, 4,116 went Democratic and 12,409 went Republican.
What is Marion County, Illinois's political typology?
Akashic places Marion County, Illinois in the "Appalachian Realigners" typology — Lower-income counties of Greater Appalachia — a long, deep arc from Democratic to Republican. 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 19 times, and other 0 times.
When did Marion County, Illinois last vote Democratic?
The most recent presidential election in which Marion County, Illinois voted Democratic was 1996.
How many people live in Marion County, Illinois?
Marion County, Illinois has a population of 37,000 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Marion County, Illinois?
Median household income in Marion County, Illinois is $61,240 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Marion County, Illinois?
Akashic tracks 38 presidential elections in Marion County, Illinois from 1876 to 2024. Of those, 15 went Democratic and 19 went Republican. The county's typology — "Appalachian Realigners" — captures where that record, its demographics, and its recent swing place it among American communities.