Blacksburg is an incorporated town in Montgomery County, Virginia, United States, with a population of 44,826 at the 2020 census. Blacksburg and the surrounding county is dominated economically and demographically by the presence of Virginia Tech.Blacksburg, Christiansburg, and the city of Radford are the three principal jurisdictions of the Blacksburg-Christiansburg Metropolitan Statistical Area, which encompasses those jurisdictions and all of Montgomery, Pulaski, and Giles counties for statistical purposes. The MSA has an estimated population of 181,863 and is currently one of the faster-growing MSAs in Virginia.