| Place Name | Thayer |
| Place Type | City |
| ZIP Code(s) | 65791 |
| County | Oregon County |
| Area Code(s) | 417 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 2,567 |
| Population Growth Rate (2010-19) | -16.05% |
| Majority Ethnicity | White 97.14% |
| US Congressional District(s) | Missouri 8th |
| State House Districts | 143 |
| State Senate Districts | 33 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.14% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0.3% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.56% |