| Place Name | Mariemont |
| Place Type | Village |
| ZIP Code(s) | 45226 45227 45243 45244 |
| County | Hamilton County |
| Area Code(s) | 283,513 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 3,388 |
| Population Growth Rate (2010-19) | 3.38% |
| Majority Ethnicity | White 96.4% |
| Metro/Micro Stats Area | Cincinnati, OH-KY-IN |
| US Congressional District(s) | Ohio 2nd |
| State House Districts | 27 |
| State Senate Districts | 7 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.4% |
| African American | 2.33% |
| Hispanic | 0.17% |
| Asian | 0.89% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.2% |