| Place Name | Grantsville Township |
| Place Type | Township |
| ZIP Code(s) | 63557 64628 64653 64674 |
| County | Linn County |
| Area Code(s) | 660 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 212 |
| Majority Ethnicity | White 95.5% |
| US Congressional District(s) | Missouri 6th |
| State House Districts | 7 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.5% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.5% |