| Place Name | St. Lucas |
| Place Type | City |
| ZIP Code(s) | 52171 52175 |
| County | Fayette County |
| Area Code(s) | 563 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 109 |
| Population Growth Rate (2010-19) | 16.78% |
| Majority Ethnicity | White 99.28% |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 55 |
| State Senate Districts | 28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.28% |
| African American | 0% |
| Hispanic | 0.72% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |