| Place Name | Rensselaer |
| Place Type | Village |
| ZIP Code(s) | 63401 63461 |
| County | Ralls County |
| Area Code(s) | 573 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 183 |
| Population Growth Rate (2010-19) | 10.96% |
| Majority Ethnicity | White 88.57% |
| Metro/Micro Stats Area | Hannibal, MO |
| US Congressional District(s) | Missouri 6th |
| State House Districts | 40 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 88.57% |
| African American | 3.67% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.76% |