Hillsboro
- County:
- Loudoun County
- County Seat:
- No
- Area (mi²):
- 0.265
- State:
- Virginia
Hillsboro is a town located in Loudoun County, Virginia. Hillsboro has a 2026 population of 110. Hillsboro is currently growing at a rate of 0.92% annually but its population has decreased by -2.65% since the most recent census, which recorded a population of 113 in 2020.