Christiansburg
- County:
- Montgomery County
- County Seat:
- Yes
- Area (mi²):
- 14.722
- State:
- Virginia
Christiansburg is a town located in Montgomery County, Virginia. Christiansburg has a 2026 population of 22,632. It is also the county seat of Montgomery County. Christiansburg is currently declining at a rate of -0.15% annually and its population has decreased by -2.9% since the most recent census, which recorded a population of 23,309 in 2020.