| Place Name | Mason Neck |
| Place Type | Census Designated Place |
| ZIP Code(s) | 20616 20640 22060 22079 22191 |
| County | Fairfax County |
| Area Code(s) | 571,703 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 2,133 |
| Population Growth Rate (2010-19) | 1.00% |
| Majority Ethnicity | White 79.21% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 8th |
| House of Delegates Districts | 42 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.21% |
| African American | 2.92% |
| Hispanic | 0.21% |
| Asian | 6.46% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 11.2% |