| Place Name | Mechanicsville |
| Place Type | Census Designated Place |
| ZIP Code(s) | 20659 |
| County | Saint Marys County |
| Area Code(s) | 240,301 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 1,563 |
| Population Growth Rate (2010-19) | 10.94% |
| Majority Ethnicity | White 87.45% |
| Metro/Micro Stats Area | California-Lexington Park, MD |
| US Congressional District(s) | Maryland 5th |
| House of Delegates Districts | 29A |
| State Senate Districts | 29 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.45% |
| African American | 10.06% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.49% |