If we take NoVa (2.9M), Virginia Beach (1.7M) and Richmond (1.2M) out of the mix, we're left with the eight MSA's listed above.  You'll note that Harrisonburg and Rockingham County have an estimated population of 133K, compared to Staunton (next smaller at 121K) and Blacksburg (next larger at 183K).
 
Click here for a larger version of the graph above.

Of note -- this graph does not include:

• NoVa (2,909,438)
  
• Virginia Beach (1,700,609)
  
• Richmond (1,263,617)