Decatur, IL · which candidate this place backed in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain, and this place is a single county: Macon County, Illinois. The figures below are that county’s, which is the same territory — not a larger unit standing in for it.
Presidential nominating contests in Decatur, IL, by party and cycle.
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
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 →
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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.
