Troy, Illinois
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | −12.9% |
| 2008 | −6.5% |
| 2012 | −22.5% |
| 2016 | −30.5% |
| 2020 | −22.2% |
| 2024 | −21.3% |
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| R | 38.0%Harris2,239 | 59.3%Trump3,497 | 2.7% | R+21.3 | D+0.9 | R+19.9 | 5,896 | |
| R | 37.6%Biden2,249 | 59.8%Trump3,578 | 2.6% | R+22.2 | D+8.3 | R+26.7 | 5,980 | |
| R | 30.5%Clinton1,636 | 61.0%Trump3,270 | 8.5% | R+30.5 | R+8.0 | R+32.6 | 5,360 | |
| R | 37.4%Obama1,718 | 59.9%Romney2,750 | 2.7% | R+22.5 | R+16.0 | R+26.3 | 4,593 | |
| R | 45.6%Obama2,142 | 52.1%McCain2,445 | 2.3% | R+6.5 | D+6.4 | R+13.7 | 4,696 | |
| R | 43.3%Kerry1,964 | 56.2%Bush2,547 | 0.5% | R+12.9 | — | R+10.4 | 4,534 |
Troy sits in Madison County's expanding suburban fringe, drawing residents priced out of closer-in Illinois and Missouri suburbs. Its rapid population growth over the past two decades has made it a bellwether for exurban political shifts in the Metro East region.
Across the recorded series it reached a Republican high of 30.5 points in 2016. Between 2020 and 2024 the city moved 0.9 points toward the Democratic candidate; the 2024 margin was 21.3 points.
A population of 11,647, a 90% non-Hispanic-white share, and a median household income of $112,434 describe the city. The city's voting pattern over the last decade is most similar to that of Huntertown and Grain Valley.
The cities 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.
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Troy, Illinois. Akashic. https://akashic.app/city/1776199/. Accessed May 20, 2026. License: CC BY 4.0.