| Place Name | Buchanan |
| Place Type | City |
| ZIP Code(s) | 49107 |
| County | Berrien County |
| Area Code(s) | 269 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 4,463 |
| Population Growth Rate (2010-19) | -3.50% |
| Majority Ethnicity | White 93.89% |
| Metro/Micro Stats Area | Niles, MI |
| US Congressional District(s) | Michigan 6th |
| State House Districts | 78 |
| State Senate Districts | 21 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.89% |
| African American | 4.34% |
| Hispanic | 0% |
| Asian | 0.54% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.23% |