| Place Name | Troy |
| Place Type | City |
| ZIP Code(s) | 62294 |
| County | Madison County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 9,959 |
| Population Growth Rate (2010-19) | 10.84% |
| Majority Ethnicity | White 93.12% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 15th |
| State House Districts | 108 |
| State Senate Districts | 54 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.12% |
| African American | 2.25% |
| Hispanic | 0.03% |
| Asian | 1.37% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.23% |