| Place Name | Denmark |
| Place Type | Census Designated Place |
| ZIP Code(s) | 52624 |
| County | Lee County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 310 |
| Population Growth Rate (2010-19) | 0.47% |
| Majority Ethnicity | White 98.48% |
| Metro/Micro Stats Area | Fort Madison-Keokuk, IA-IL-MO |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 84 |
| State Senate Districts | 42 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.48% |
| African American | 0% |
| Hispanic | 0.76% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.76% |