HarrisDemocratic25.4%4,240TrumpRepublican73.2%12,189KennedyIndependent1.3%210
R+47.7- Lead
- 7,949
- Total
- 16,662
- vs nation
- R+46.2
- Turnout
- 59.7%
Akashiccounty
Jefferson County, IL
Office (updates table and map)
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
President results by year
2024 turnout 59.7% of 28,130 citizens 18+
BidenDemocratic26.4%4,608TrumpRepublican71.6%12,476JorgensenLibertarian1.2%214
R+45.1- Lead
- 7,868
- Total
- 17,436
- vs nation
- R+49.6
- Turnout
- 60.2%
ClintonDemocratic26.0%4,425TrumpRepublican68.8%11,695JohnsonLibertarian3.4%573
R+42.8- Lead
- 7,270
- Total
- 16,999
- vs nation
- R+44.9
- Turnout
- 56.9%
ObamaDemocratic37.3%6,089RomneyRepublican60.1%9,811JOHNSONLibertarian1.7%273
R+22.8- Lead
- 3,722
- Total
- 16,320
- vs nation
- R+26.7
- Turnout
- —
ObamaDemocratic43.5%7,462McCainRepublican54.3%9,302OtherAll other candidates2.2%377
R+10.7- Lead
- 1,840
- Total
- 17,141
- vs nation
- R+18.0
- Turnout
- —
KerryDemocratic39.6%6,713BushRepublican59.9%10,160OtherAll other candidates0.4%75
R+20.3- Lead
- 3,447
- Total
- 16,948
- vs nation
- R+17.9
- Turnout
- —
GoreDemocratic43.5%6,685BushRepublican54.4%8,362NaderGreen1.4%211
R+10.9- Lead
- 1,677
- Total
- 15,360
- vs nation
- R+11.4
- Turnout
- —
ClintonDemocratic48.5%7,263DoleRepublican39.6%5,937PerotReform11.0%1,647
D+8.9- Lead
- 1,326
- Total
- 14,981
- vs nation
- D+0.3
- Turnout
- —
Key facts
- 2024 presidential margin
- R+47.7MIT Election Lab
- Population
- 36,5502024 5-year
- Median household income
- $63,1182024 5-year
- White (non-Hispanic)
- 83.6%2024 5-year
- Black
- 5.8%2024 5-year
- Hispanic / Latino
- 2.8%2024 5-year
- Peak Democratic margin
- D+27.7 in 1932MIT Election Lab
- Peak Republican margin
- R+47.7 in 2024MIT Election Lab
- Most similar
- Marion County, IL · twin score 92.0
Midterm durability
Total general-election participants divided by same-year citizen voting-age population. These are total ballots or participating voters—not presidential candidate votes.
- 2024 total turnout
- 59.7%16,798 participants ÷ 28,130 CVAP
- 2020→2022 drop-off
- +13.3 ptsVolatile
- Drop-off versus state
- -8.8 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026 scenario
- 46.4%–49.1%Recent-cycle and two-cycle persistence scenarios; not a forecast
| Election | Participants | CVAP | Turnout | Quality |
|---|---|---|---|---|
| 2016 · Presidential | 16,999 | 29,855 | 56.9% | C/A |
| 2018 · Midterm | 14,411 | 29,461 | 48.9% | A/A |
| 2020 · Presidential | 17,562 | 29,178 | 60.2% | A/A |
| 2022 · Midterm | 13,396 | 28,573 | 46.9% | C/A |
| 2024 · Presidential | 16,798 | 28,130 | 59.7% | A/A |
Sources and methods
- 2016: numerator source 159, denominator source 157; top ticket votes; canonical-complete-contest-floor-v1; allocation share 0.0%; series 148/111.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2022: numerator source 159, denominator source 157; top ticket votes; canonical-complete-contest-floor-v1; allocation share 0.0%; series 154/183.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
Precinct data
Results by precinct
70 precincts · 16,798 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -MT VERNON 02MT VERNON 02 | 240 | 815 | 13 | 1,068 | 22.5% | 76.3% | R+53.8 |
|---|---|---|---|---|---|---|---|
| Precinct -MT VERNON 01MT VERNON 01 | 229 | 607 | 28 | 864 | 26.5% | 70.3% | R+43.8 |
| Precinct -FIELDFIELD | 163 | 645 | 15 | 823 | 19.8% | 78.4% | R+58.6 |
| Precinct -SHILOH 4SHILOH 4 | 303 | 491 | 26 | 820 | 37.0% | 59.9% | R+22.9 |
| Precinct -SHILOH 2SHILOH 2 | 229 | 552 | 17 | 798 | 28.7% | 69.2% | R+40.5 |
| Precinct -MCCLELLANMCCLELLAN | 139 | 581 | 18 | 738 | 18.8% | 78.7% | R+59.9 |
| Precinct -DODDS 1DODDS 1 | 149 | 570 | 14 | 733 | 20.3% | 77.8% | R+57.4 |
| Precinct -CASNERCASNER | 105 | 577 | 17 | 699 | 15.0% | 82.5% | R+67.5 |
| Precinct -SHILOH 3SHILOH 3 | 227 | 381 | 15 | 623 | 36.4% | 61.2% | R+24.7 |
| Precinct -MT VERNON 05MT VERNON 05 | 183 | 379 | 15 | 577 | 31.7% | 65.7% | R+34.0 |
| Precinct -SHILOH 5SHILOH 5 | 191 | 371 | 8 | 570 | 33.5% | 65.1% | R+31.6 |
| Precinct -WEBBER 2WEBBER 2 | 76 | 463 | 13 | 552 | 13.8% | 83.9% | R+70.1 |
| Precinct -WEBBER 1WEBBER 1 | 91 | 437 | 13 | 541 | 16.8% | 80.8% | R+64.0 |
| Precinct -ROME 1ROME 1 | 123 | 392 | 8 | 523 | 23.5% | 75.0% | R+51.4 |
| Precinct -DODDS 2DODDS 2 | 129 | 382 | 5 | 516 | 25.0% | 74.0% | R+49.0 |
| Precinct -MT VERNON 07MT VERNON 07 | 140 | 338 | 11 | 489 | 28.6% | 69.1% | R+40.5 |
| Precinct -GRAND PRAIRIEGRAND PRAIRIE | 69 | 402 | 6 | 477 | 14.5% | 84.3% | R+69.8 |
| Precinct -PENDLETONPENDLETON | 72 | 368 | 10 | 450 | 16.0% | 81.8% | R+65.8 |
| Precinct -SHILOH 1SHILOH 1 | 104 | 331 | 14 | 449 | 23.2% | 73.7% | R+50.6 |
| Precinct -BALD HILLBALD HILL | 94 | 343 | 9 | 446 | 21.1% | 76.9% | R+55.8 |
| Precinct -MT VERNON 08MT VERNON 08 | 158 | 248 | 16 | 422 | 37.4% | 58.8% | R+21.3 |
| Precinct -MT VERNON 03MT VERNON 03 | 148 | 251 | 6 | 405 | 36.5% | 62.0% | R+25.4 |
| Precinct -ELK PRAIRIEELK PRAIRIE | 78 | 319 | 7 | 404 | 19.3% | 79.0% | R+59.7 |
| Precinct -ROME 2ROME 2 | 71 | 312 | 7 | 390 | 18.2% | 80.0% | R+61.8 |
| Precinct -SPRING GARDEN 1SPRING GARDEN 1 | 80 | 275 | 6 | 361 | 22.2% | 76.2% | R+54.0 |
| Precinct -SPRING GARDEN 2SPRING GARDEN 2 | 56 | 278 | 7 | 341 | 16.4% | 81.5% | R+65.1 |
| Precinct -FARRINGTONFARRINGTON | 40 | 260 | 10 | 310 | 12.9% | 83.9% | R+71.0 |
| Precinct -MT VERNON 09MT VERNON 09 | 125 | 159 | 12 | 296 | 42.2% | 53.7% | R+11.5 |
| Precinct -MT VERNON 10MT VERNON 10 | 139 | 123 | 5 | 267 | 52.1% | 46.1% | D+6.0 |
| Precinct -BLISSVILLEBLISSVILLE | 38 | 202 | 4 | 244 | 15.6% | 82.8% | R+67.2 |
| Precinct -MT VERNON 06MT VERNON 06 | 128 | 86 | 3 | 217 | 59.0% | 39.6% | D+19.4 |
| Precinct -MT VERNON 04MT VERNON 04 | 98 | 94 | 3 | 195 | 50.3% | 48.2% | D+2.1 |
| Precinct -MOORES PRAIRIEMOORES PRAIRIE | 25 | 157 | 8 | 190 | 13.2% | 82.6% | R+69.5 |
| BALD HILL 1 Voting District17_1708100101 | 0 | 0 | 0 | 0 | — | — | No votes |
| BLISSVILLE Voting District17_1708100201 | 0 | 0 | 0 | 0 | — | — | No votes |
| CASNER 1 Voting District17_1708100301 | 0 | 0 | 0 | 0 | — | — | No votes |
| DODDS 1 Voting District17_1708100401 | 0 | 0 | 0 | 0 | — | — | No votes |
| DODDS 2 Voting District17_1708100402 | 0 | 0 | 0 | 0 | — | — | No votes |
| ELK PRAIRIE 1 Voting District17_1708100501 | 0 | 0 | 0 | 0 | — | — | No votes |
| FARRINGTON Voting District17_1708100601 | 0 | 0 | 0 | 0 | — | — | No votes |
| FIELD Voting District17_1708100701 | 0 | 0 | 0 | 0 | — | — | No votes |
| GRAND PRAIRIE Voting District17_1708100801 | 0 | 0 | 0 | 0 | — | — | No votes |
| MCCLELLAN 1 Voting District17_1708100901 | 0 | 0 | 0 | 0 | — | — | No votes |
| MCCLELLAN 2 Voting District17_1708100902 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOORES PRAIRIE Voting District17_1708101001 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 1 Voting District17_1708101101 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 10 Voting District17_1708101110 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 11 Voting District17_1708101111 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 12 Voting District17_1708101112 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 13 Voting District17_1708101113 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 14 Voting District17_1708101114 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 2 Voting District17_1708101102 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 3 Voting District17_1708101103 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 4 Voting District17_1708101104 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 5 Voting District17_1708101105 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 6 Voting District17_1708101106 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 7 Voting District17_1708101107 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 8 Voting District17_1708101108 | 0 | 0 | 0 | 0 | — | — | No votes |
| MOUNT VERNON 9 Voting District17_1708101109 | 0 | 0 | 0 | 0 | — | — | No votes |
| PENDLETON 1 Voting District17_1708101201 | 0 | 0 | 0 | 0 | — | — | No votes |
| ROME 1 Voting District17_1708101301 | 0 | 0 | 0 | 0 | — | — | No votes |
| ROME 2 Voting District17_1708101302 | 0 | 0 | 0 | 0 | — | — | No votes |
| SHILOH 1 Voting District17_1708101401 | 0 | 0 | 0 | 0 | — | — | No votes |
| SHILOH 2 Voting District17_1708101402 | 0 | 0 | 0 | 0 | — | — | No votes |
| SHILOH 3 Voting District17_1708101403 | 0 | 0 | 0 | 0 | — | — | No votes |
| SHILOH 4 Voting District17_1708101404 | 0 | 0 | 0 | 0 | — | — | No votes |
| SPRING GARDEN 1 Voting District17_1708101501 | 0 | 0 | 0 | 0 | — | — | No votes |
| SPRING GARDEN 2 Voting District17_1708101502 | 0 | 0 | 0 | 0 | — | — | No votes |
| WEBBER 1 Voting District17_1708101601 | 0 | 0 | 0 | 0 | — | — | No votes |
| WEBBER 2 Voting District17_1708101602 | 0 | 0 | 0 | 0 | — | — | No votes |
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +7.3% |
| 1896 | +15.6% |
| 1900 | +8.3% |
| 1904 | −10.1% |
| 1908 | +2.5% |
| 1912 | +21.2% |
| 1916 | +5.1% |
| 1920 | −8.8% |
| 1924 | +7.0% |
| 1928 | −10.7% |
| 1932 | +27.7% |
| 1936 | +16.7% |
| 1940 | +11.1% |
| 1944 | +3.5% |
| 1948 | +9.4% |
| 1952 | −6.2% |
| 1956 | −8.7% |
| 1960 | −11.7% |
| 1964 | +21.4% |
| 1968 | −5.8% |
| 1972 | −19.2% |
| 1976 | +9.5% |
| 1980 | −13.5% |
| 1984 | −14.5% |
| 1988 | +0.7% |
| 1992 | +18.0% |
| 1996 | +8.9% |
| 2000 | −10.9% |
| 2004 | −20.3% |
| 2008 | −10.7% |
| 2012 | −22.8% |
| 2016 | −42.8% |
| 2020 | −45.1% |
| 2024 | −47.7% |
DemocraticRepublican
Federal and statewide elections · 3 House · 37 Senate · 3 Senate special · 13 governor
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
U.S. Senate
Each row shows U.S. Senate votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
U.S. Senate special elections
Each row shows U.S. Senate special votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
Governor
Each row shows Governor votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
voter registration
Registered voters
Total registered voters, over time
Registered voters
| Year | Total registered |
|---|---|
| 2016 | 31,677 |
| 2018 | 25,933 |
| 2020 | 26,018 |
| 2022 | 25,355 |
| 2024 | 25,340 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+105 net domestic migration · 2025
20112025
Net −2,033 over 2011–2025 · gain loss
Arrivals reported $47,152 in average income, against $69,341 for residents who stayed — 32% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+47.7 on average — about the same lean as Jefferson County, IL (R+47.7).
Where arrivals came from lean of each source
- Marion County, IL83R+49.5
- Franklin County, IL75R+50.5
- Williamson County, IL31R+38.7
- Wayne County, IL27R+70.9
- Washington County, IL26R+57.2
- Hamilton County, IL24R+63.3
Where departures went households, 2022–23
- Marion County, IL96
- Franklin County, IL56
- Williamson County, IL40
- Washington County, IL35
- Wayne County, IL33
- Hamilton County, IL25
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −42 |
| 2012 | −159 |
| 2013 | −76 |
| 2014 | −323 |
| 2015 | −210 |
| 2016 | −158 |
| 2017 | −238 |
| 2018 | −367 |
| 2019 | −44 |
| 2021 | +7 |
| 2022 | −302 |
| 2023 | −91 |
| 2024 | −135 |
| 2025 | +105 |
Jefferson County's R+47.7 margin in 2024 reflects the broader partisan shift that has reshaped rural southern Illinois over the past two decades, leaving it among the state's most lopsided counties despite a mid-sized population near 40,000.
Across the recorded series it reached a Democratic high of 27.7 points in 1932 and a Republican high of 47.7 points in 2024. Between 2020 and 2024 the county moved 2.6 points toward the Republican candidate; the 2024 margin was 47.7 points.
A population of 36,550, a 84% non-Hispanic-white share, and a median household income of $63,118 describe the county. The county's voting pattern over the last decade is most similar to that of Marion County and Franklin County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Marion County
Illinois
92.0twin score
elasticity12-yr trend% Evangelical
Franklin County
Illinois
88.7twin score
elasticity12-yr trend% Evangelical≠ Italian ancestry
Henry County
Missouri
87.2twin score
12-yr trendelasticity% Evangelical≠ Polish ancestry
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.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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.
Jefferson County, Illinois. Akashic. https://akashic.app/county/17081/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Jefferson County
Illinois at the ballot boxAll elections →
Frequently asked questions
How did Jefferson County, Illinois vote in 2024?
In 2024, Jefferson County, Illinois voted Republican by 47.7 points (R+47.7), carried by the Republican candidate. Out of 16,662 votes cast, 4,240 went Democratic and 12,189 went Republican.
When did Jefferson County, Illinois last vote Democratic?
The most recent presidential election in which Jefferson County, Illinois voted Democratic was 1996.
How many people live in Jefferson County, Illinois?
Jefferson County, Illinois has a population of 36,550 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Illinois?
Median household income in Jefferson County, Illinois is $63,118 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Jefferson County, Illinois?
Akashic tracks 38 presidential elections in Jefferson County, Illinois from 1876 to 2024. Of those, 17 went Democratic and 17 went Republican.