| Place Name | Merrimac |
| Place Type | Census Designated Place |
| ZIP Code(s) | 24060 24073 |
| County | Montgomery County |
| Area Code(s) | 540 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 2,107 |
| Population Growth Rate (2010-19) | 33.99% |
| Majority Ethnicity | White 74.47% |
| Metro/Micro Stats Area | Blacksburg-Christiansburg, VA |
| US Congressional District(s) | Virginia 9th |
| House of Delegates Districts | 7 |
| State Senate Districts | 21 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 74.47% |
| African American | 13.58% |
| Hispanic | 0.54% |
| Asian | 4.9% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.52% |