| Place Name | Monrovia |
| Place Type | Census Designated Place |
| ZIP Code(s) | 21770 |
| County | Frederick County |
| Area Code(s) | 240,301 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 353 |
| Population Growth Rate (2010-19) | 549.52% |
| Majority Ethnicity | White 49.74% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Maryland 8th |
| House of Delegates Districts | 4 |
| State Senate Districts | 4 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 49.74% |
| African American | 24.85% |
| Hispanic | 0% |
| Asian | 21.06% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.34% |