| Place Name | St. Mary |
| Place Type | City |
| ZIP Code(s) | 40033 |
| County | Marion County |
| Area Code(s) | 270,364 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 183 |
| Majority Ethnicity | White 99.6% |
| US Congressional District(s) | Kentucky 1st |
| State House Districts | 24 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.6% |
| African American | 0.4% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |