| Place Name | Marietta |
| Place Type | City |
| ZIP Code(s) | 56257 |
| County | Lac Qui Parle County |
| Area Code(s) | 320 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 211 |
| Population Growth Rate (2010-19) | -28.40% |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | Minnesota 7th |
| State House Districts | 16A |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |