| Place Name | Colchester |
| Place Type | City |
| ZIP Code(s) | 62326 |
| County | Mcdonough County |
| Area Code(s) | 309 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 1,274 |
| Population Growth Rate (2010-19) | -20.91% |
| Majority Ethnicity | White 99.77% |
| Metro/Micro Stats Area | Macomb, IL |
| US Congressional District(s) | Illinois 18th |
| State House Districts | 93 |
| State Senate Districts | 47 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.77% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.23% |