HarrisDemocratic24.1%2,816TrumpRepublican74.3%8,684KennedyIndependent1.6%191
R+50.2- Lead
- 5,868
- Total
- 11,694
- vs nation
- R+48.7
- Turnout
- 69.7%
Akashiccounty
Jersey County, IL
Contests in this Place (89 available)
President34 · 1892–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
President results by year
2024 turnout 69.7% of 16,923 citizens 18+
BidenDemocratic24.8%2,961TrumpRepublican72.8%8,712JorgensenLibertarian1.7%202
R+48.1- Lead
- 5,751
- Total
- 11,960
- vs nation
- R+52.5
- Turnout
- 72.7%
ClintonDemocratic24.4%2,679TrumpRepublican70.5%7,748JohnsonLibertarian3.7%410
R+46.1- Lead
- 5,069
- Total
- 10,991
- vs nation
- R+48.2
- Turnout
- 62.8%
ObamaDemocratic36.7%3,667RomneyRepublican60.4%6,039JOHNSONLibertarian1.7%173
R+23.7- Lead
- 2,372
- Total
- 10,001
- vs nation
- R+27.6
- Turnout
- —
ObamaDemocratic47.6%5,042McCainRepublican50.4%5,329OtherAll other candidates2.0%212
R+2.7- Lead
- 287
- Total
- 10,583
- vs nation
- R+10.0
- Turnout
- —
KerryDemocratic45.3%4,597BushRepublican53.6%5,435OtherAll other candidates1.0%105
R+8.3- Lead
- 838
- Total
- 10,137
- vs nation
- R+5.8
- Turnout
- —
GoreDemocratic46.3%4,355BushRepublican49.9%4,699NaderGreen2.5%231
R+3.7- Lead
- 344
- Total
- 9,413
- vs nation
- R+4.2
- Turnout
- —
ClintonDemocratic48.8%4,275DoleRepublican36.6%3,211PerotReform13.5%1,186
D+12.1- Lead
- 1,064
- Total
- 8,766
- vs nation
- D+3.6
- Turnout
- —
Key facts
- 2024 presidential margin
- R+50.2MIT Election Lab
- Population
- 21,2742024 5-year
- Population density
- 58 / sq mi2024 5-year · TIGER/Line
- Land area
- 370 sq miTIGER/Line
- Median household income
- $80,3612024 5-year
- White (non-Hispanic)
- 94.6%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 1.6%2024 5-year
- Peak Democratic margin
- D+27.2 in 1932MIT Election Lab
- Peak Republican margin
- R+50.2 in 2024MIT Election Lab
- Most similar
- Calhoun County, IL · twin score 86.1
Turnout and midterm durability
Participation measured against the same-year citizen voting-age population. Audited cycles count total general-election participants — ballots or participating voters, not presidential candidate votes. Cycles before 2016 predate that series and are derived from the certified presidential returns instead; they are marked everywhere they appear and are excluded from the figures below.
2004–20248 cycles · 5 audited
- 2024 turnout
- 69.7%11,792 participants ÷ 16,923 CVAP
- 2020→2022 drop-off
- +17.0 ptsVolatile
- Drop-off vs state
- -5.1 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026
- 52.7%–55.7%Recent-cycle and two-cycle persistence scenarios; not a forecast
Participation by cycle
Presidential Midterm Derived, pre-2016
Select a presidential cycle to show it on the map and results ledger above.
| Cycle | Participants | CVAP | Turnout | Series | Quality |
|---|---|---|---|---|---|
| 11,792 | 16,923 ± 142 | 69.7% | Audited | A/A | |
| 2022Mid | 9,523 | 17,114 ± 182 | 55.6% | Audited | A/A |
| 12,533 | 17,247 ± 171 | 72.7% | Audited | A/A | |
| 2018Mid | 8,955 | 17,267 ± 203 | 51.9% | Audited | A/A |
| 10,991 | 17,495 ± 181 | 62.8% | Audited | C/A | |
| 10,001 | 17,624 | 56.7% | Derived | — | |
| 10,583 | 17,071 | 62.0% | Derived | — | |
| 10,137 | 16,518 extrapolated | 61.4% | Derived | — |
Sources and methods
Audited cycles (2016, 2018, 2020, 2022, 2024) count total general-election participants against the same-year CVAP special tabulation, each cell carrying its own numerator and denominator quality grade. Derived cycles (2004, 2008, 2012) come from the certified presidential returns on this page over the ACS 5-year CVAP series, so they measure presidential votes cast rather than ballots — a floor on participation. Where a derived cycle predates the ACS its denominator is extrapolated rather than read, and says so on its own line below. They are shown for the longer arc and are excluded from the drop-off, excess-drop-off, and 2026 scenario figures above.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
- 2022: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 306/183.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2016: numerator source 159, denominator source 157; top ticket votes; canonical-complete-contest-floor-v1; allocation share 0.0%; series 148/111.
- 2012 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2008 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2004 (derived): Certified presidential returns · extrapolated CVAP denominator; presidential votes cast — a floor on participation, not a ballot count; 2004 predates the ACS, so the denominator is a linear back-extrapolation from the 2008 and 2012 CVAP values, not a read figure.
Interactive election map
One map. Every available contest.
The map and local result cover Jersey County only. The complete contest result is shown below for comparison.
Jersey County result
0 precinct units · 0 candidate votes
JB Pritzker0—
Governor contest result
Loading the complete contest result…
Explore precinct resultsSearch, sort, compare years, or export CSV · 47 precincts
Precinct data
Results by precinct
47 precincts · 11,792 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -JERSEY 08JERSEY 08 | 263 | 653 | 31 | 947 | 27.8% | 69.0% | R+41.2 |
|---|---|---|---|---|---|---|---|
| Precinct -PIASA 1PIASA 1 | 183 | 731 | 26 | 940 | 19.5% | 77.8% | R+58.3 |
| Precinct -JERSEY 05JERSEY 05 | 176 | 704 | 12 | 892 | 19.7% | 78.9% | R+59.2 |
| Precinct -QUARRYQUARRY | 208 | 462 | 17 | 687 | 30.3% | 67.2% | R+37.0 |
| Precinct -JERSEY 06JERSEY 06 | 144 | 521 | 18 | 683 | 21.1% | 76.3% | R+55.2 |
| Precinct -MISSISSIPPI 1MISSISSIPPI 1 | 148 | 504 | 11 | 663 | 22.3% | 76.0% | R+53.7 |
| Precinct -JERSEY 03JERSEY 03 | 163 | 446 | 17 | 626 | 26.0% | 71.2% | R+45.2 |
| Precinct -ELSAH 2ELSAH 2 | 188 | 418 | 15 | 621 | 30.3% | 67.3% | R+37.0 |
| Precinct -JERSEY 02JERSEY 02 | 131 | 429 | 17 | 577 | 22.7% | 74.4% | R+51.6 |
| Precinct -PIASA 2PIASA 2 | 133 | 424 | 14 | 571 | 23.3% | 74.3% | R+51.0 |
| Precinct -OTTER CREEKOTTER CREEK | 87 | 443 | 9 | 539 | 16.1% | 82.2% | R+66.0 |
| Precinct -JERSEY 01JERSEY 01 | 129 | 331 | 17 | 477 | 27.0% | 69.4% | R+42.3 |
| Precinct -JERSEY 07JERSEY 07 | 134 | 318 | 16 | 468 | 28.6% | 67.9% | R+39.3 |
| Precinct -ELSAH 1ELSAH 1 | 167 | 273 | 12 | 452 | 36.9% | 60.4% | R+23.5 |
| Precinct -MISSISSIPPI 2MISSISSIPPI 2 | 96 | 335 | 17 | 448 | 21.4% | 74.8% | R+53.3 |
| Precinct -FIDELITYFIDELITY | 70 | 303 | 8 | 381 | 18.4% | 79.5% | R+61.2 |
| Precinct -JERSEY 04JERSEY 04 | 118 | 248 | 11 | 377 | 31.3% | 65.8% | R+34.5 |
| Precinct -RICHWOODRICHWOOD | 51 | 297 | 3 | 351 | 14.5% | 84.6% | R+70.1 |
| Precinct -ENGLISHENGLISH | 73 | 238 | 7 | 318 | 23.0% | 74.8% | R+51.9 |
| Precinct -PIASA 3PIASA 3 | 67 | 240 | 8 | 315 | 21.3% | 76.2% | R+54.9 |
| Precinct -ROSEDALEROSEDALE | 50 | 184 | 5 | 239 | 20.9% | 77.0% | R+56.1 |
| Precinct -RUYLERUYLE | 37 | 182 | 1 | 220 | 16.8% | 82.7% | R+65.9 |
| ELSAH 1 Voting District17_1708300101 | 0 | 0 | 0 | 0 | — | — | No votes |
| ELSAH 2 Voting District17_1708300102 | 0 | 0 | 0 | 0 | — | — | No votes |
| ENGLISH Voting District17_1708300201 | 0 | 0 | 0 | 0 | — | — | No votes |
| FIDELITY Voting District17_1708300301 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 1 Voting District17_1708300401 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 10 Voting District17_1708300410 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 2 Voting District17_1708300402 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 3 Voting District17_1708300403 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 4 Voting District17_1708300404 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 5 Voting District17_1708300405 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 6 Voting District17_1708300406 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 7 Voting District17_1708300407 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 8 Voting District17_1708300408 | 0 | 0 | 0 | 0 | — | — | No votes |
| JERSEY 9 Voting District17_1708300409 | 0 | 0 | 0 | 0 | — | — | No votes |
| MISSISSIPPI 1 Voting District17_1708300501 | 0 | 0 | 0 | 0 | — | — | No votes |
| MISSISSIPPI 2 Voting District17_1708300502 | 0 | 0 | 0 | 0 | — | — | No votes |
| OTTER CREEK Voting District17_1708300601 | 0 | 0 | 0 | 0 | — | — | No votes |
| PIASA 1 Voting District17_1708300701 | 0 | 0 | 0 | 0 | — | — | No votes |
| PIASA 2 Voting District17_1708300702 | 0 | 0 | 0 | 0 | — | — | No votes |
| PIASA 3 Voting District17_1708300703 | 0 | 0 | 0 | 0 | — | — | No votes |
| QUARRY 1 Voting District17_1708300801 | 0 | 0 | 0 | 0 | — | — | No votes |
| QUARRY 2 Voting District17_1708300802 | 0 | 0 | 0 | 0 | — | — | No votes |
| RICHWOOD Voting District17_1708300901 | 0 | 0 | 0 | 0 | — | — | No votes |
| ROSEDALE Voting District17_1708301001 | 0 | 0 | 0 | 0 | — | — | No votes |
| RUYLE Voting District17_1708301101 | 0 | 0 | 0 | 0 | — | — | No votes |
presidential history
Party record book
Jersey County, IL · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
62.7%
3,807 votes · D+27.2
Runner-up · William J. Bryan, 1896 · 58.3%
Republican
Donald Trump2024
74.3%
8,684 votes · R+50.2
Runner-up · Donald Trump, 2020 · 72.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
5,042votes
47.6% of the vote · R+2.7
Runner-up · Bill Clinton, 1992 · 4,749 votes
Republican
Donald Trump2020
8,712votes
72.8% of the vote · R+48.1
Runner-up · Donald Trump, 2024 · 8,684 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
John W. Davis1924
+29.9pts D vs U.S.
Place D+4.8 · U.S. R+25.2
Runner-up · Alton B. Parker, 1904 · +25.1 pts
Republican
Donald Trump2020
+52.5pts R vs U.S.
Place R+48.1 · U.S. D+4.5
Runner-up · Donald Trump, 2024 · +48.7 pts
current representation
Current officeholders
RJil TracyState Senate · 50
RC.D. DavidsmeyerState House · 100
Seats representing Jersey County, IL. A county elects none of these itself — they are the members for the 1 congressional, 1 state senate and 1 state house districts it falls inside, so parts of the county are represented by different members.
U.S. House elections · 2 House
Senate and governor results are in the Office selector at the top of this page.
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.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 0.0%0 | 100.0%9,387 | 9,387 |
| 2020 | R | 25.0%2,922 | 75.0%8,764 | 11,686 |
voter registration
Registered voters
Total registered voters, over time
Registered voters
| Year | Total registered |
|---|---|
| 2016 | 18,868 |
| 2018 | 16,341 |
| 2020 | 16,639 |
| 2022 | 15,735 |
| 2024 | 15,887 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+116 net domestic migration · 2025
20112025
Net −826 over 2011–2025 · gain loss
Arrivals reported $62,004 in average income, against $78,394 for residents who stayed — 21% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+19.0 on average — 31 points more Democratic-leaning than Jersey County, IL itself (R+50.2).
Where arrivals came from lean of each source
- Madison County, IL181R+13.2
- Macoupin County, IL55R+39.2
- Greene County, IL31R+57.8
- St. Louis County, MO30D+23.4
Where departures went households, 2022–23
- Madison County, IL203
- Macoupin County, IL54
- Greene County, IL41
- St. Louis County, MO24
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 | −97 |
| 2012 | −168 |
| 2013 | −80 |
| 2014 | −106 |
| 2015 | −191 |
| 2016 | −289 |
| 2017 | −6 |
| 2018 | −70 |
| 2019 | −18 |
| 2021 | −14 |
| 2022 | −11 |
| 2023 | +26 |
| 2024 | +82 |
| 2025 | +116 |
Jersey County, a rural Mississippi River county southwest of St. Louis, has shifted steadily rightward over two decades — its 2024 presidential margin of R+50 places it among the most lopsided counties in a state that trends Democratic statewide.
Across the recorded series it reached a Democratic high of 27.2 points in 1932 and a Republican high of 50.2 points in 2024. Between 2020 and 2024 the county moved 2.1 points toward the Republican candidate; the 2024 margin was 50.2 points.
A population of 21,274, a 95% non-Hispanic-white share, and a median household income of $80,361 describe the county. The county's voting pattern over the last decade is most similar to that of Calhoun County and Macoupin County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Calhoun County
Illinois
86.1twin score
% Whiteelasticity2000–2020 trajectory≠ 12-yr trend
Macoupin County
Illinois
80.6twin score
12-yr trend% White2000–2004 trajectory
Lincoln County
Missouri
80.3twin score
12-yr trend% White% Evangelical≠ median age
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.
Jersey County, Illinois. Akashic. https://akashic.app/county/17083/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Jersey County
Illinois at the ballot boxAll elections →
Frequently asked questions
How did Jersey County, Illinois vote in 2024?
In 2024, Jersey County, Illinois voted Republican by 50.2 points (R+50.2), carried by the Republican candidate. Out of 11,694 votes cast, 2,816 went Democratic and 8,684 went Republican.
When did Jersey County, Illinois last vote Democratic?
The most recent presidential election in which Jersey County, Illinois voted Democratic was 1996.
How many people live in Jersey County, Illinois?
Jersey County, Illinois has a population of 21,274 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jersey County, Illinois?
Median household income in Jersey County, Illinois is $80,361 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Jersey County, Illinois?
Akashic tracks 38 presidential elections in Jersey County, Illinois from 1876 to 2024. Of those, 16 went Democratic and 18 went Republican.