| Place Name | Herndon |
| Place Type | Town |
| ZIP Code(s) | 20170 |
| GEOID | 5136648 |
| County | Fairfax County |
| Area Code(s) | 571,703 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 24,574 |
| Majority Ethnicity | White 44.35% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 11th |
| House of Delegates Districts | 86 |
| State Senate Districts | 33 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 44.35% |
| African American | 6.7% |
| Hispanic | 0.72% |
| Asian | 14.71% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 33.53% |