| Place Name | Calamus |
| Place Type | City |
| ZIP Code(s) | 52729 |
| County | Clinton County |
| Area Code(s) | 563 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 389 |
| Population Growth Rate (2010-19) | -18.91% |
| Majority Ethnicity | White 97.52% |
| Metro/Micro Stats Area | Clinton, IA |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 97 |
| State Senate Districts | 49 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.52% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.48% |