| Donald Trump ✓Republican | 56.7% | 1,963 |
|---|---|---|
| Kamala HarrisDemocratic | 40.5% | 1,401 |
| OtherAll other candidates | 2.9% | 99 |
| Year | Margin (D minus R) |
|---|---|
| 2008 | −10.7% |
| 2012 | −24.3% |
| 2016 | −22.8% |
| 2020 | −15.1% |
| 2024 | −16.2% |
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 1,401 | 1,963 | 3,463 | ||
| R | 1,461 | 2,002 | 3,575 | ||
| R | 1,126 | 1,888 | 3,342 | ||
| R | 1,200 | 1,972 | 3,172 | ||
| R | 1,423 | 1,769 | 3,245 |
Demographics
Demographic Profile
Key indicators compared across containing geographies
| Indicator | MonticelloCity | IllinoisState | United StatesNation |
|---|---|---|---|
| Race & Ethnicity | |||
| White | 94.5% | 61.0% | 61.0% |
| Black | 2.7% | 13.6% | 12.2% |
| Asian | 0.9% | 6.0% | 6.0% |
| Two or more races | 0.7% | 10.9% | 12.6% |
| Other race | 1.2% | 8.6% | 8.2% |
| Hispanic or Latino | 1.9% | 18.8% | 19.3% |
| Income & Age | |||
| Median household income | $99,449 | $83,390 | $84,427 |
| Poverty rate | 5.7% | 11.8% | 12.5% |
| Median age | 43.8 | 39.1 | 39.1 |
| Age 18–24 | 6.6% | 9.1% | 9.2% |
| Age 65 and older | 21.1% | 16.9% | 17.2% |
| Education & Language | |||
| Bachelor's degree or higher (25+) | 40.7% | 37.8% | 35.7% |
| Speaks a non-English language at home | 2.7% | 24.0% | 22.3% |
| Spanish | 1.7% | 14.0% | 13.6% |
| Ancestry | |||
| Largest ancestry | German 23.5% | German 16.1% | German 12.5% |
| 2nd-largest ancestry | English 17.3% | Irish 10.6% | English 9.5% |
| 3rd-largest ancestry | Irish 13.8% | English 6.9% | Irish 9.4% |
| Religion | |||
| Catholic | 6.9%County context | 24.2% | 18.6% |
| Evangelical Protestant | 12.0%County context | 11.7% | 16.5% |
| Unaffiliated or unclaimed | 63.5%County context | 49.2% | 51.5% |
| Mainline Protestant | 16.9%County context | 5.3% | 5.2% |
ACS values are survey estimates and may include margins of error.
Religion data may be available only at county or larger geographies. Sub-county values are labeled when inherited, modeled, or contextual.
Monticello sits in the Upper Midwest. In 2024 it voted Republican.
Across the recorded series it reached a Republican high of 24.3 points in 2012. Between 2020 and 2024 the city moved 1.1 points toward the Republican candidate; the 2024 margin was 16.2 points.
A population of 6,304, a 95% non-Hispanic-white share, and a median household income of $99,449 describe the city.
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 →
Monticello, Illinois. Akashic. https://akashic.app/city/1750244/. Accessed May 20, 2026. License: CC BY 4.0.