Monroe County, Illinois
Precinct data
Results by precinct
62 precincts · 21,117 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -11 | 430 | 744 | 34 | 1,208 | 35.6% | 61.6% | R+26.0 |
|---|---|---|---|---|---|---|---|
| Precinct -99 | 376 | 741 | 30 | 1,147 | 32.8% | 64.6% | R+31.8 |
| Precinct -2121 | 301 | 810 | 33 | 1,144 | 26.3% | 70.8% | R+44.5 |
| Precinct -2323 | 255 | 781 | 23 | 1,059 | 24.1% | 73.7% | R+49.7 |
| Precinct -1818 | 294 | 696 | 26 | 1,016 | 28.9% | 68.5% | R+39.6 |
| Precinct -1212 | 320 | 664 | 25 | 1,009 | 31.7% | 65.8% | R+34.1 |
| Precinct -2424 | 173 | 812 | 22 | 1,007 | 17.2% | 80.6% | R+63.5 |
| Precinct -1717 | 259 | 657 | 22 | 938 | 27.6% | 70.0% | R+42.4 |
| Precinct -2222 | 230 | 610 | 28 | 868 | 26.5% | 70.3% | R+43.8 |
| Precinct -1111 | 300 | 544 | 23 | 867 | 34.6% | 62.7% | R+28.1 |
| Precinct -77 | 329 | 495 | 31 | 855 | 38.5% | 57.9% | R+19.4 |
| Precinct -22 | 320 | 484 | 27 | 831 | 38.5% | 58.2% | R+19.7 |
| Precinct -2525 | 162 | 649 | 15 | 826 | 19.6% | 78.6% | R+59.0 |
| Precinct -1414 | 296 | 479 | 23 | 798 | 37.1% | 60.0% | R+22.9 |
| Precinct -1919 | 189 | 584 | 20 | 793 | 23.8% | 73.6% | R+49.8 |
| Precinct -55 | 252 | 511 | 23 | 786 | 32.1% | 65.0% | R+33.0 |
| Precinct -88 | 265 | 460 | 35 | 760 | 34.9% | 60.5% | R+25.7 |
| Precinct -1313 | 213 | 481 | 17 | 711 | 30.0% | 67.7% | R+37.7 |
| Precinct -2020 | 182 | 509 | 13 | 704 | 25.9% | 72.3% | R+46.4 |
| Precinct -33 | 284 | 375 | 27 | 686 | 41.4% | 54.7% | R+13.3 |
| Precinct -1616 | 215 | 442 | 11 | 668 | 32.2% | 66.2% | R+34.0 |
| Precinct -66 | 223 | 421 | 23 | 667 | 33.4% | 63.1% | R+29.7 |
| Precinct -1515 | 197 | 423 | 19 | 639 | 30.8% | 66.2% | R+35.4 |
| Precinct -44 | 240 | 361 | 19 | 620 | 38.7% | 58.2% | R+19.5 |
| Precinct -1010 | 168 | 322 | 20 | 510 | 32.9% | 63.1% | R+30.2 |
| PRECINCT 117_1713300001 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1017_1713300010 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1117_1713300011 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1217_1713300012 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1317_1713300013 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1417_1713300014 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1517_1713300015 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1617_1713300016 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1717_1713300017 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1817_1713300018 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 1917_1713300019 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 217_1713300002 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2017_1713300020 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2117_1713300021 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2217_1713300022 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2317_1713300023 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2417_1713300024 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2517_1713300025 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2617_1713300026 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2717_1713300027 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2817_1713300028 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 2917_1713300029 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 317_1713300003 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3017_1713300030 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3117_1713300031 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3217_1713300032 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3317_1713300033 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3417_1713300034 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3517_1713300035 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3617_1713300036 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 3717_1713300037 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 417_1713300004 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 517_1713300005 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 617_1713300006 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 717_1713300007 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 817_1713300008 | 0 | 0 | 0 | 0 | — | — | Even |
| PRECINCT 917_1713300009 | 0 | 0 | 0 | 0 | — | — | Even |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +15.9% |
| 1896 | +6.6% |
| 1900 | +6.7% |
| 1904 | −5.9% |
| 1908 | −6.8% |
| 1912 | −1.1% |
| 1916 | −14.5% |
| 1920 | −48.0% |
| 1924 | −20.7% |
| 1928 | +3.8% |
| 1932 | +28.9% |
| 1936 | +3.7% |
| 1940 | −25.4% |
| 1944 | −32.1% |
| 1948 | −25.3% |
| 1952 | −30.1% |
| 1956 | −28.1% |
| 1960 | −16.4% |
| 1964 | +7.8% |
| 1968 | −24.7% |
| 1972 | −37.2% |
| 1976 | −16.7% |
| 1980 | −32.2% |
| 1984 | −36.0% |
| 1988 | −16.1% |
| 1992 | +0.7% |
| 1996 | −4.8% |
| 2000 | −13.3% |
| 2004 | −16.4% |
| 2008 | −10.7% |
| 2012 | −26.7% |
| 2016 | −36.7% |
| 2020 | −35.7% |
| 2024 | −36.3% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 33.2%5,197 | 65.3%10,240 | 15,670 |
| 2020 | R | 32.0%6,717 | 65.7%13,805 | 21,015 |
Registered voters
Total registered voters, over time
| Year | Total registered |
|---|---|
| 2016 | 26,081 |
| 2018 | 26,442 |
| 2020 | 32,019 |
| 2022 | 23,943 |
| 2024 | 29,966 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−86 net domestic migration · 2025
Net +1,594 over 2011–2025 · gain loss
Arrivals reported $77,134 in average income, against $109,861 for residents who stayed — 30% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+4.4 on average — 41 points more Democratic-leaning than Monroe County, IL itself (R+36.3).
Where arrivals came from lean of each source
- St. Clair County, IL218D+7.8
- St. Louis County, MO124D+23.4
- Randolph County, IL60R+50.0
- St. Louis city, MO38D+64.6
- Jefferson County, MO37R+36.7
- Madison County, IL34R+13.2
Where departures went households, 2022–23
- St. Clair County, IL168
- St. Louis County, MO118
- Randolph County, IL52
- St. Louis city, MO39
- Jefferson County, MO36
- Madison County, IL34
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 | +185 |
| 2012 | +4 |
| 2013 | +172 |
| 2014 | +33 |
| 2015 | +164 |
| 2016 | +99 |
| 2017 | +183 |
| 2018 | +159 |
| 2019 | +227 |
| 2021 | +94 |
| 2022 | +148 |
| 2023 | +172 |
| 2024 | +40 |
| 2025 | −86 |
Tucked along the Mississippi south of St. Louis, Monroe County has shifted steadily rightward over two decades, delivering a 36-point Republican presidential margin in 2024 despite sitting within commuting distance of a major metro area.
Across the recorded series it reached a Democratic high of 28.9 points in 1932 and a Republican high of 48.0 points in 1920. Between 2020 and 2024 the county moved 0.6 points toward the Republican candidate; the 2024 margin was 36.3 points.
A population of 35,036, a 95% non-Hispanic-white share, and a median household income of $102,880 describe the county. The county's voting pattern over the last decade is most similar to that of Geauga County and Washington 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 →
Monroe County, Illinois. Akashic. https://akashic.app/county/17133/. Accessed May 20, 2026. License: CC BY 4.0.