| Place Name | Cobb Island |
| Place Type | Census Designated Place |
| ZIP Code(s) | 20625 |
| County | Charles County |
| Area Code(s) | 240,301 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 676 |
| Population Growth Rate (2010-19) | -20.33% |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Maryland 5th |
| House of Delegates Districts | 28 |
| State Senate Districts | 28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |