Jefferson County, Illinois
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 | — | — | Even |
| BLISSVILLE Voting District17_1708100201 | 0 | 0 | 0 | 0 | — | — | Even |
| CASNER 1 Voting District17_1708100301 | 0 | 0 | 0 | 0 | — | — | Even |
| DODDS 1 Voting District17_1708100401 | 0 | 0 | 0 | 0 | — | — | Even |
| DODDS 2 Voting District17_1708100402 | 0 | 0 | 0 | 0 | — | — | Even |
| ELK PRAIRIE 1 Voting District17_1708100501 | 0 | 0 | 0 | 0 | — | — | Even |
| FARRINGTON Voting District17_1708100601 | 0 | 0 | 0 | 0 | — | — | Even |
| FIELD Voting District17_1708100701 | 0 | 0 | 0 | 0 | — | — | Even |
| GRAND PRAIRIE Voting District17_1708100801 | 0 | 0 | 0 | 0 | — | — | Even |
| MCCLELLAN 1 Voting District17_1708100901 | 0 | 0 | 0 | 0 | — | — | Even |
| MCCLELLAN 2 Voting District17_1708100902 | 0 | 0 | 0 | 0 | — | — | Even |
| MOORES PRAIRIE Voting District17_1708101001 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 1 Voting District17_1708101101 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 10 Voting District17_1708101110 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 11 Voting District17_1708101111 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 12 Voting District17_1708101112 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 13 Voting District17_1708101113 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 14 Voting District17_1708101114 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 2 Voting District17_1708101102 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 3 Voting District17_1708101103 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 4 Voting District17_1708101104 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 5 Voting District17_1708101105 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 6 Voting District17_1708101106 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 7 Voting District17_1708101107 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 8 Voting District17_1708101108 | 0 | 0 | 0 | 0 | — | — | Even |
| MOUNT VERNON 9 Voting District17_1708101109 | 0 | 0 | 0 | 0 | — | — | Even |
| PENDLETON 1 Voting District17_1708101201 | 0 | 0 | 0 | 0 | — | — | Even |
| ROME 1 Voting District17_1708101301 | 0 | 0 | 0 | 0 | — | — | Even |
| ROME 2 Voting District17_1708101302 | 0 | 0 | 0 | 0 | — | — | Even |
| SHILOH 1 Voting District17_1708101401 | 0 | 0 | 0 | 0 | — | — | Even |
| SHILOH 2 Voting District17_1708101402 | 0 | 0 | 0 | 0 | — | — | Even |
| SHILOH 3 Voting District17_1708101403 | 0 | 0 | 0 | 0 | — | — | Even |
| SHILOH 4 Voting District17_1708101404 | 0 | 0 | 0 | 0 | — | — | Even |
| SPRING GARDEN 1 Voting District17_1708101501 | 0 | 0 | 0 | 0 | — | — | Even |
| SPRING GARDEN 2 Voting District17_1708101502 | 0 | 0 | 0 | 0 | — | — | Even |
| WEBBER 1 Voting District17_1708101601 | 0 | 0 | 0 | 0 | — | — | Even |
| WEBBER 2 Voting District17_1708101602 | 0 | 0 | 0 | 0 | — | — | Even |
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% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 28.4%3,731 | 69.9%9,163 | 13,116 |
| 2020 | R | 30.0%5,099 | 67.1%11,399 | 16,983 |
Registered voters
Total registered voters, over time
| Year | Total registered |
|---|---|
| 2016 | 31,677 |
| 2018 | 25,933 |
| 2020 | 26,018 |
| 2022 | 25,355 |
| 2024 | 25,340 |
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
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.
The counties 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.
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 →
Jefferson County, Illinois. Akashic. https://akashic.app/county/17081/. Accessed May 20, 2026. License: CC BY 4.0.