| Place Name | Rosemont |
| Place Type | Village |
| ZIP Code(s) | 21716 21758 |
| County | Frederick County |
| Area Code(s) | 240,301 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 325 |
| Population Growth Rate (2010-19) | -7.48% |
| Majority Ethnicity | White 95.81% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Maryland 6th |
| House of Delegates Districts | 4 |
| State Senate Districts | 4 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.81% |
| African American | 1.61% |
| Hispanic | 0.32% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.26% |