Blacksburg–Christiansburg metropolitan area
The Blacksburg-Christiansburg Metropolitan Statistical Area,  formerly the Blacksburg-Christiansburg-Radford Metropolitan Statistical Area, is a Metropolitan Statistical Area (MSA) as defined by the United States Office of Management and Budget (OMB) located in the New River Valley of Southwest Virginia. As of the 2010 census, the MSA had a population of 162,958 (a July 1, 2009 estimate placed the population at 159,587). 
The MSA is dominated by the presence of Virginia Tech and Radford University. The area, known as the New River Valley (or NRV), has experienced tremendous growth in the last twenty years and continues to be among the fastest growing areas in Virginia. It is bordered by the Allegheny Mountains to the North and the Blue Ridge Mountains to the South, with the New River flowing through the valley itself. The central communities in the area consist of two towns and one city; state law draws a sharp distinction between cities, which are completely separate from counties, and towns, which are contained within counties. Blacksburg, the larger of the towns, is home to Virginia Tech, while Radford, the only city in the group, is home to Radford University. Christiansburg, a town which lies between Blacksburg and Radford, is the Montgomery County county seat and home to a branch of the New River Community College as well as hundreds of stores and restaurants and a historic downtown.
Note: Since a state constitutional change in 1871, all cities in Virginia are independent cities that are not located in any county. The OMB considers these independent cities to be county-equivalents for the purpose of defining MSAs in Virginia.
Four counties and one independent city are included in the Blacksburg-Christiansburg Metropolitan Statistical Area. 
- Blacksburg (Principal city)
- Elliston-Lafayette ( census-designated place)
- Fairlawn (census-designated place)
- Merrimac (census-designated place)
- Shawsville (census-designated place)
As of the census  of 2000, there were 151,272 people, 58,443 households, and 34,881 families residing within the MSA. The racial makeup of the MSA was 91.24% White, 4.34% African American, 0.18% Native American, 2.44% Asian, 0.03% Pacific Islander, 0.50% from other races, and 1.28% from two or more races. Hispanics or Latinos of any race were 1.29% of the population.
The median income for a household in the MSA was $31,446, and the median income for a family was $44,478. Males had a median income of $32,377 versus $22,605 for females. The per capita income for the MSA was $17,184.
- "OMB Bulletin No. 20-01: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas" (PDF). United States Office of Management and Budget. March 6, 2020. Retrieved April 24, 2020.
- "Table 1. Annual Estimates of the Population of Metropolitan and Micropolitan Statistical Areas: April 1, 2000 to July 1, 2009 (CBSA-EST2009-01)". 2009 Population Estimates. United States Census Bureau, Population Division. 2010-03-23. Archived from the original ( CSV) on 2010-06-15. Retrieved 2010-03-24.
- "Metropolitan Statistical Areas and Components" ( TXT). Metropolitan statistical areas and metropolitan divisions defined by the Office of Management and Budget, November 2007. United States Census Bureau, Population Division. 2008-06-24. Retrieved 2008-09-02.
- "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.