| Place Name | Dahlgren |
| Place Type | Census Designated Place |
| ZIP Code(s) | 22448 |
| County | King George County |
| Area Code(s) | 540 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 2,835 |
| Population Growth Rate (2010-19) | 11.04% |
| Majority Ethnicity | White 63.24% |
| US Congressional District(s) | Virginia 1st |
| House of Delegates Districts | 99 |
| State Senate Districts | 28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 63.24% |
| African American | 28.87% |
| Hispanic | 0.03% |
| Asian | 0.36% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.5% |