Grundy County, Illinois
Precinct data
Results by precinct
90 precincts · 26,778 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -AUX SABLE 06-008AUX SABLE 06-008 | 582 | 1,030 | 36 | 1,648 | 35.3% | 62.5% | R+27.2 |
|---|---|---|---|---|---|---|---|
| Precinct -AUX SABLE 04-005AUX SABLE 04-005 | 548 | 866 | 26 | 1,440 | 38.1% | 60.1% | R+22.1 |
| Precinct -SARATOGA 04-046SARATOGA 04-046 | 394 | 700 | 38 | 1,132 | 34.8% | 61.8% | R+27.0 |
| Precinct -BRACEVILLE 01-011BRACEVILLE 01-011 | 337 | 749 | 34 | 1,120 | 30.1% | 66.9% | R+36.8 |
| Precinct -ERIENNA 01-018ERIENNA 01-018 | 385 | 580 | 23 | 988 | 39.0% | 58.7% | R+19.7 |
| Precinct -AUX SABLE 07-010AUX SABLE 07-010 | 388 | 535 | 16 | 939 | 41.3% | 57.0% | R+15.7 |
| Precinct -AUX SABLE 01-001AUX SABLE 01-001 | 365 | 483 | 11 | 859 | 42.5% | 56.2% | R+13.7 |
| Precinct -AUX SABLE 05-006AUX SABLE 05-006 | 360 | 454 | 27 | 841 | 42.8% | 54.0% | R+11.2 |
| Precinct -BRACEVILLE 03-016BRACEVILLE 03-016 | 220 | 565 | 23 | 808 | 27.2% | 69.9% | R+42.7 |
| Precinct -BRACEVILLE 04-017BRACEVILLE 04-017 | 249 | 481 | 22 | 752 | 33.1% | 64.0% | R+30.9 |
| Precinct -GARFIELD 01-025GARFIELD 01-025 | 213 | 509 | 22 | 744 | 28.6% | 68.4% | R+39.8 |
| Precinct -MAZON 01-034MAZON 01-034 | 185 | 526 | 22 | 733 | 25.2% | 71.8% | R+46.5 |
| Precinct -FELIX 02-022FELIX 02-022 | 190 | 482 | 11 | 683 | 27.8% | 70.6% | R+42.8 |
| Precinct -AUX SABLE 03-004AUX SABLE 03-004 | 258 | 402 | 20 | 680 | 37.9% | 59.1% | R+21.2 |
| Precinct -WAUPONSEE 01-049WAUPONSEE 01-049 | 221 | 439 | 18 | 678 | 32.6% | 64.7% | R+32.2 |
| Precinct -WAUPONSEE 02-050WAUPONSEE 02-050 | 203 | 446 | 22 | 671 | 30.3% | 66.5% | R+36.2 |
| Precinct -MORRIS 04-038MORRIS 04-038 | 245 | 390 | 18 | 653 | 37.5% | 59.7% | R+22.2 |
| Precinct -GOOSE LAKE 02-028GOOSE LAKE 02-028 | 180 | 453 | 7 | 640 | 28.1% | 70.8% | R+42.7 |
| Precinct -MORRIS 02-036MORRIS 02-036 | 241 | 379 | 17 | 637 | 37.8% | 59.5% | R+21.7 |
| Precinct -MORRIS 01-035MORRIS 01-035 | 245 | 364 | 20 | 629 | 39.0% | 57.9% | R+18.9 |
| Precinct -FELIX 01-021FELIX 01-021 | 205 | 405 | 14 | 624 | 32.9% | 64.9% | R+32.1 |
| Precinct -SARATOGA 01-042SARATOGA 01-042 | 226 | 366 | 14 | 606 | 37.3% | 60.4% | R+23.1 |
| Precinct -MORRIS 05-039MORRIS 05-039 | 254 | 332 | 11 | 597 | 42.5% | 55.6% | R+13.1 |
| Precinct -ERIENNA 02-019ERIENNA 02-019 | 187 | 391 | 18 | 596 | 31.4% | 65.6% | R+34.2 |
| Precinct -AUX SABLE 02-002AUX SABLE 02-002 | 189 | 389 | 7 | 585 | 32.3% | 66.5% | R+34.2 |
| Precinct -MORRIS 03-037MORRIS 03-037 | 221 | 338 | 16 | 575 | 38.4% | 58.8% | R+20.3 |
| Precinct -SARATOGA 03-045SARATOGA 03-045 | 198 | 327 | 17 | 542 | 36.5% | 60.3% | R+23.8 |
| Precinct -GREENFIELD 01-029GREENFIELD 01-029 | 193 | 319 | 11 | 523 | 36.9% | 61.0% | R+24.1 |
| Precinct -GOOSE LAKE 01-027GOOSE LAKE 01-027 | 171 | 344 | 7 | 522 | 32.8% | 65.9% | R+33.1 |
| Precinct -SARATOGA 05-047SARATOGA 05-047 | 131 | 370 | 12 | 513 | 25.5% | 72.1% | R+46.6 |
| Precinct -FELIX 04-024FELIX 04-024 | 198 | 283 | 10 | 491 | 40.3% | 57.6% | R+17.3 |
| Precinct -BRACEVILLE 02-12/13BRACEVILLE 02-12/13 | 131 | 349 | 7 | 487 | 26.9% | 71.7% | R+44.8 |
| Precinct -FELIX 03-023FELIX 03-023 | 137 | 243 | 14 | 394 | 34.8% | 61.7% | R+26.9 |
| Precinct -VIENNA 01-048VIENNA 01-048 | 98 | 257 | 14 | 369 | 26.6% | 69.6% | R+43.1 |
| Precinct -AUX SABLE 05-007AUX SABLE 05-007 | 120 | 225 | 5 | 350 | 34.3% | 64.3% | R+30.0 |
| Precinct -NETTLE CREEK 01-040NETTLE CREEK 01-040 | 74 | 233 | 6 | 313 | 23.6% | 74.4% | R+50.8 |
| Precinct -SARATOGA 02-043SARATOGA 02-043 | 73 | 209 | 3 | 285 | 25.6% | 73.3% | R+47.7 |
| Precinct -NORMAN 01-041NORMAN 01-041 | 66 | 138 | 6 | 210 | 31.4% | 65.7% | R+34.3 |
| Precinct -GOODFARM 01-026GOODFARM 01-026 | 50 | 143 | 3 | 196 | 25.5% | 73.0% | R+47.4 |
| Precinct -SARATOGA 02-044SARATOGA 02-044 | 73 | 114 | 3 | 190 | 38.4% | 60.0% | R+21.6 |
| Precinct -MAINE 01-32/33MAINE 01-32/33 | 38 | 136 | 5 | 179 | 21.2% | 76.0% | R+54.7 |
| Precinct -BRACEVILLE 02-14/15BRACEVILLE 02-14/15 | 42 | 99 | 5 | 146 | 28.8% | 67.8% | R+39.0 |
| Precinct -HIGHLAND 01-031HIGHLAND 01-031 | 29 | 112 | 2 | 143 | 20.3% | 78.3% | R+58.0 |
| Precinct -AUX SABLE 02-003AUX SABLE 02-003 | 9 | 21 | 2 | 32 | 28.1% | 65.6% | R+37.5 |
| Precinct -AUX SABLE 07-009AUX SABLE 07-009 | 11 | 16 | 1 | 28 | 39.3% | 57.1% | R+17.9 |
| Precinct -GREENFIELD 01-030GREENFIELD 01-030 | 3 | 4 | 0 | 7 | 42.9% | 57.1% | R+14.3 |
| AUX SABLE 1 Voting District17_17063AS01 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 2 Voting District17_17063AS02 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 3 Voting District17_17063AS03 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 4 Voting District17_17063AS04 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 5 Voting District17_17063AS05 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 6 Voting District17_17063AS06 | 0 | 0 | 0 | 0 | — | — | Even |
| AUX SABLE 7 Voting District17_17063AS07 | 0 | 0 | 0 | 0 | — | — | Even |
| BRACEVILLE 1 Voting District17_17063BR01 | 0 | 0 | 0 | 0 | — | — | Even |
| BRACEVILLE 2 Voting District17_17063BR02 | 0 | 0 | 0 | 0 | — | — | Even |
| BRACEVILLE 3 Voting District17_17063BR03 | 0 | 0 | 0 | 0 | — | — | Even |
| BRACEVILLE 4 Voting District17_17063BR04 | 0 | 0 | 0 | 0 | — | — | Even |
| ERIENNA 2 Voting District17_17063ER02 | 0 | 0 | 0 | 0 | — | — | Even |
| ERIENNA Voting District17_17063ER01 | 0 | 0 | 0 | 0 | — | — | Even |
| FELIX 1 Voting District17_17063FE01 | 0 | 0 | 0 | 0 | — | — | Even |
| FELIX 2 Voting District17_17063FE02 | 0 | 0 | 0 | 0 | — | — | Even |
| FELIX 3 Voting District17_17063FE03 | 0 | 0 | 0 | 0 | — | — | Even |
| FELIX 4 Voting District17_17063FE04 | 0 | 0 | 0 | 0 | — | — | Even |
| GARFIELD 1 Voting District17_17063GA01 | 0 | 0 | 0 | 0 | — | — | Even |
| GARFIELD 2 Voting District17_17063GA02 | 0 | 0 | 0 | 0 | — | — | Even |
| GOODFARM Voting District17_17063GD01 | 0 | 0 | 0 | 0 | — | — | Even |
| GOOSE LAKE 2 Voting District17_17063GL02 | 0 | 0 | 0 | 0 | — | — | Even |
| GOOSELAKE Voting District17_17063GL01 | 0 | 0 | 0 | 0 | — | — | Even |
| GREENFIELD 1 Voting District17_17063GR01 | 0 | 0 | 0 | 0 | — | — | Even |
| GREENFIELD 2 Voting District17_17063GR02 | 0 | 0 | 0 | 0 | — | — | Even |
| HIGHLAND Voting District17_17063HL01 | 0 | 0 | 0 | 0 | — | — | Even |
| MAINE Voting District17_17063MA01 | 0 | 0 | 0 | 0 | — | — | Even |
| MAZON Voting District17_17063MZ01 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 1 Voting District17_17063MR01 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 2 Voting District17_17063MR02 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 3 Voting District17_17063MR03 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 4 Voting District17_17063MR04 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 5 Voting District17_17063MR05 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 6 Voting District17_17063MR06 | 0 | 0 | 0 | 0 | — | — | Even |
| MORRIS 7 Voting District17_17063MR07 | 0 | 0 | 0 | 0 | — | — | Even |
| NETTLE CREEK Voting District17_17063NE01 | 0 | 0 | 0 | 0 | — | — | Even |
| NORMAN Voting District17_17063NR01 | 0 | 0 | 0 | 0 | — | — | Even |
| SARASOTA 5 Voting District17_17063SA05 | 0 | 0 | 0 | 0 | — | — | Even |
| SARATOGA 1 Voting District17_17063SA01 | 0 | 0 | 0 | 0 | — | — | Even |
| SARATOGA 2 Voting District17_17063SA02 | 0 | 0 | 0 | 0 | — | — | Even |
| SARATOGA 3 Voting District17_17063SA03 | 0 | 0 | 0 | 0 | — | — | Even |
| SARATOGA 4 Voting District17_17063SA04 | 0 | 0 | 0 | 0 | — | — | Even |
| VIENNA Voting District17_17063VN01 | 0 | 0 | 0 | 0 | — | — | Even |
| WAUPONSEE 1 Voting District17_17063WA01 | 0 | 0 | 0 | 0 | — | — | Even |
| WAUPONSEE 2 Voting District17_17063WA02 | 0 | 0 | 0 | 0 | — | — | Even |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −6.2% |
| 1896 | −21.5% |
| 1900 | −35.9% |
| 1904 | −52.7% |
| 1908 | −35.7% |
| 1912 | −4.4% |
| 1916 | −35.5% |
| 1920 | −66.2% |
| 1924 | −53.0% |
| 1928 | −23.4% |
| 1932 | +2.8% |
| 1936 | −8.6% |
| 1940 | −23.2% |
| 1944 | −28.0% |
| 1948 | −29.2% |
| 1952 | −40.4% |
| 1956 | −48.9% |
| 1960 | −23.8% |
| 1964 | −2.6% |
| 1968 | −28.8% |
| 1972 | −41.7% |
| 1976 | −15.5% |
| 1980 | −33.5% |
| 1984 | −34.4% |
| 1988 | −22.4% |
| 1992 | −1.4% |
| 1996 | +3.9% |
| 2000 | −7.2% |
| 2004 | −13.8% |
| 2008 | +1.7% |
| 2012 | −8.9% |
| 2016 | −23.2% |
| 2020 | −25.8% |
| 2024 | −29.5% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 39.7%7,685 | 58.2%11,266 | 19,370 |
| 2020 | R | 37.1%9,766 | 57.1%15,005 | 26,299 |
Registered voters
Total registered voters, over time
| Year | Total registered |
|---|---|
| 2016 | 38,164 |
| 2018 | 37,238 |
| 2020 | 36,996 |
| 2022 | 34,048 |
| 2024 | 38,854 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+279 net domestic migration · 2025
Net +200 over 2011–2025 · gain loss
Arrivals reported $65,639 in average income, against $90,919 for residents who stayed — 28% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+2.7 on average — 32 points more Democratic-leaning than Grundy County, IL itself (R+29.5).
Where arrivals came from lean of each source
- Will County, IL710D+1.6
- Cook County, IL150D+41.6
- LaSalle County, IL95R+18.5
- Kendall County, IL86D+1.5
- DuPage County, IL68D+13.1
- Livingston County, IL60R+46.3
Where departures went households, 2022–23
- Will County, IL502
- LaSalle County, IL138
- Cook County, IL124
- Livingston County, IL73
- Kendall County, IL62
- DuPage County, IL50
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 | −311 |
| 2012 | −177 |
| 2013 | −220 |
| 2014 | −111 |
| 2015 | −135 |
| 2016 | −280 |
| 2017 | +116 |
| 2018 | +179 |
| 2019 | −99 |
| 2021 | +412 |
| 2022 | +151 |
| 2023 | +318 |
| 2024 | +78 |
| 2025 | +279 |
Grundy County, anchored by Morris along the Illinois River, shifted from a competitive industrial belt to an R+29.5 result in 2024—a trajectory that mirrors the broader realignment of working-class exurban counties across the Midwest.
Across the recorded series it reached a Democratic high of 3.9 points in 1996 and a Republican high of 66.2 points in 1920. Between 2020 and 2024 the county moved 3.8 points toward the Republican candidate; the 2024 margin was 29.5 points.
A population of 53,219, a 82% non-Hispanic-white share, and a median household income of $92,235 describe the county. The county's voting pattern over the last decade is most similar to that of LaSalle County and Wyoming 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 →
Grundy County, Illinois. Akashic. https://akashic.app/county/17063/. Accessed May 20, 2026. License: CC BY 4.0.