| Place Name | South Arm Township |
| Place Type | Township |
| ZIP Code(s) | 49727 49729 |
| County | Charlevoix County |
| Area Code(s) | 231 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 2,007 |
| Majority Ethnicity | White 98.04% |
| US Congressional District(s) | Michigan 1st |
| State House Districts | 105 |
| State Senate Districts | 37 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.04% |
| African American | 0% |
| Hispanic | 1.31% |
| Asian | 0.1% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.55% |