| Place Name | Rock River Township |
| Place Type | Township |
| County | Alger County |
| Area Code(s) | 906 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 995 |
| Majority Ethnicity | White 99.69% |
| US Congressional District(s) | Michigan 1st |
| State House Districts | 109 |
| State Senate Districts | 38 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.69% |
| African American | 0.31% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |