† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
1 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupDecatur, ILIllinoisUnited States
German18.6%16.1%12.5%
English12.4%6.9%9.5%
Irish10.4%10.6%9.4%
American6.0%3.3%5.3%
Italian1.7%5.4%4.8%
Polish1.7%6.0%2.2%
Scottish1.7%—1.3%
French1.5%0.7%1.6%
African American†15.6%12.1%9.9%
African0.4%0.5%0.5%
Mexican1.9%14.4%11.3%
Puerto Rican0.3%1.7%1.8%
Asian Indian0.6%2.1%1.4%
Filipino0.3%1.0%0.9%
Chinese0.2%1.0%1.3%
Korean0.2%0.4%0.4%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Decatur, IL
Illinois
United States
Median age
40.6
39.1
39.1
Age 18–24
8.4%
9.1%
9.2%
Age 65 and older
21.1%
16.9%
17.2%
Household economy
Measure
Decatur, IL
Illinois
United States
Median household income
$62,666
$83,390
$84,427
Poverty rate
15.0%
11.8%
12.5%
Bachelor's degree or higher (25+)
24.4%
37.9%
35.6%
Languages at home
Measure
Decatur, IL
Illinois
United States
Speaks a non-English language at home
4.1%
24.1%
22.3%
Spanish
1.7%
14.0%
13.6%
Religious landscape
Measure
Decatur, IL
Illinois
United States
Catholic
9.4%
24.2%
18.6%
Evangelical Protestant
22.2%
11.7%
16.5%
Unclaimed / not counted
53.7%
49.2%
51.5%
Mainline Protestant
7.2%
5.3%
5.2%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Decatur, IL
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−2.9%
1896
−13.1%
1900
−10.8%
1904
−33.3%
1908
−17.1%
1912
+8.8%
1916
−10.7%
1920
−33.9%
1924
−35.8%
1928
−42.0%
1932
+12.1%
1936
+27.1%
1940
+15.9%
1944
+7.5%
1948
+6.8%
1952
−7.2%
1956
−9.1%
1960
−2.1%
1964
+32.2%
1968
+4.7%
1972
−18.6%
1976
+6.3%
1980
−11.1%
1984
−8.9%
1988
+3.0%
1992
+15.8%
1996
+12.9%
2000
+0.9%
2004
−9.2%
2008
+1.1%
2012
−5.2%
2016
−17.7%
2020
−17.6%
2024
−18.9%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
39.7%Harris18,009
58.6%Trump26,562
1.7%
R+18.9
R+1.2
R+17.4
45,341
R
40.1%Biden19,847
57.7%Trump28,589
2.2%
R+17.6
D+0.1
R+22.1
49,534
R
38.2%Clinton18,343
55.9%Trump26,866
5.9%
R+17.7
R+12.6
R+19.8
48,060
R
46.5%Obama22,780
51.6%Romney25,309
1.9%
R+5.2
R+6.2
R+9.0
49,030
D
49.8%Obama25,487
48.7%McCain24,948
1.5%
D+1.1
D+10.3
R+6.2
51,216
R
45.1%Kerry23,341
54.3%Bush28,118
0.6%
R+9.2
R+10.1
R+6.8
51,746
D
49.0%Gore24,262
48.1%Bush23,830
2.8%
D+0.9
R+12.0
D+0.4
49,499
D
51.4%Clinton24,256
38.4%Dole18,161
10.2%
D+12.9
R+2.9
D+4.4
47,235
D
49.4%Clinton27,449
33.6%Bush18,684
17.0%
D+15.8
D+12.7
D+10.2
55,580
D
51.3%Dukakis25,364
48.2%Bush23,862
0.5%
D+3.0
D+11.9
D+10.8
49,489
R
45.4%Mondale25,463
54.3%Reagan30,457
0.3%
R+8.9
D+2.2
D+9.3
56,112
R
41.4%Carter22,325
52.4%Reagan28,298
6.2%
R+11.1
R+17.3
R+1.3
53,956
D
52.7%Carter28,243
46.4%Ford24,893
0.9%
D+6.3
D+24.8
D+4.2
53,599
R
40.6%McGovern20,296
59.2%Nixon29,596
0.3%
R+18.6
R+23.3
D+4.6
50,029
D
47.0%Humphrey23,369
42.3%Nixon21,027
10.7%
D+4.7
R+27.5
D+5.4
49,741
D
66.1%Johnson35,045
33.9%Goldwater17,957
0.0%
D+32.2
D+34.3
D+9.7
53,002
R
48.8%Kennedy26,029
51.0%Nixon27,151
0.2%
R+2.1
D+7.0
R+2.3
53,288
R
45.4%Stevenson23,066
54.5%Eisenhower27,673
0.1%
R+9.1
R+1.9
D+6.3
50,771
R
46.3%Stevenson22,277
53.6%Eisenhower25,744
0.1%
R+7.2
R+14.1
D+3.5
48,066
D
53.1%Truman21,487
46.3%Dewey18,719
0.6%
D+6.8
R+0.7
D+2.4
40,456
D
53.6%Roosevelt22,808
46.1%Dewey19,608
0.4%
D+7.5
R+8.3
±0.0
42,569
D
57.6%Roosevelt27,589
41.8%Willkie19,998
0.6%
D+15.9
R+11.2
D+5.9
47,864
D
62.9%Roosevelt27,360
35.8%Landon15,585
1.2%
D+27.1
D+15.0
D+2.8
43,486
D
55.0%Roosevelt21,638
42.9%Hoover16,868
2.1%
D+12.1
D+54.1
R+5.7
39,346
R
28.7%Smith9,932
70.7%Hoover24,492
0.7%
R+42.0
R+6.2
R+24.5
34,654
R
24.4%Davis6,670
60.2%Coolidge16,458
15.4%
R+35.8
R+1.9
R+10.6
27,331
R
31.3%Cox7,917
65.3%Harding16,486
3.4%
R+33.9
R+23.3
R+7.7
25,257
R
42.3%Wilson11,181
53.0%Hughes13,997
4.7%
R+10.7
R+19.4
R+13.8
26,427
O
36.1%Wilson4,435
27.3%Taft3,356
36.5%
Roosevelt +0.4
D+25.9
R+10.8
12,278
R
38.9%Bryan4,615
56.0%Taft6,643
5.1%
R+17.1
D+16.2
R+7.5
11,866
R
29.5%Parker2,952
62.8%Roosevelt6,284
7.7%
R+33.3
R+22.5
R+13.6
10,008
R
43.5%Bryan4,874
54.3%McKinley6,086
2.3%
R+10.8
D+2.3
R+3.3
11,216
R
42.6%Bryan4,756
55.7%McKinley6,216
1.6%
R+13.1
R+10.2
R+7.0
11,154
R
45.2%Cleveland4,303
48.0%Harrison4,575
6.8%
R+2.9
—
R+4.5
9,524
Congressional elections · 2 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2022
R
41.3%14,573
56.8%20,042
35,282
2020
R
41.1%20,127
55.3%27,072
48,949
voter registration
Registered voters
Total registered voters, over time
Registered voters
Voter registration in Decatur, IL
Year
Total registered
2016
79,765
2018
79,379
2020
80,880
2022
80,906
2024
75,295
domestic migration
Who moves in and out
Net domestic migration over time
−462 net domestic migration · 2025
20112025
Net −11,989 over 2011–2025 · gain loss
Domestic migration in Decatur, IL in Decatur, IL: net domestic migration by year
Year
Net domestic migration
2011
−373
2012
−748
2013
−845
2014
−1,213
2015
−1,269
2016
−1,118
2017
−1,079
2018
−977
2019
−564
2021
−997
2022
−1,225
2023
−783
2024
−336
2025
−462
Decatur anchors Macon County, a once-reliably Democratic union stronghold that shifted sharply rightward as Archer Daniels Midland's workforce contracted and the region's industrial base eroded over the past three decades.
Across the recorded series it reached a Democratic high of 32.2 points in 1964 and a Republican high of 42.0 points in 1928. Between 2020 and 2024 the metro moved 1.2 points toward the Republican candidate; the 2024 margin was 18.9 points.
A population of 101,849, a 73% non-Hispanic-white share, and a median household income of $62,666 describe the metro. The metro's voting pattern over the last decade is most similar to that of Flint, MI and Elizabeth City, NC.
Akashic
Political twins — metros
The metros whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
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.
Decatur, IL, Illinois. Akashic. https://akashic.app/cbsa/19500/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Decatur, IL, Illinois voted Republican by 18.9 points (R+18.9), carried by the Republican candidate. Out of 45,341 votes cast, 18,009 went Democratic and 26,562 went Republican.
When did Decatur, IL, Illinois last vote Democratic?
The most recent presidential election in which Decatur, IL, Illinois voted Democratic was 2008.
How many people live in Decatur, IL, Illinois?
Decatur, IL, Illinois has a population of 101,849 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Decatur, IL, Illinois?
Median household income in Decatur, IL, Illinois is $62,666 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Decatur, IL, Illinois?
Akashic tracks 34 presidential elections in Decatur, IL, Illinois from 1892 to 2024. Of those, 13 went Democratic and 20 went Republican.
