And just for the heck of it, here's how Region IV will look:

Southwest:

Abingdon
Marion
Richlands
Tazewell
Graham
Grundy
Carroll Co.

Piedmont:

Magna Vista
Bassett
Patrick Co.
Martinsville
Tunstall

River Ridge:

Pulaski Co.
Blacksburg
Christiansburg
Salem
Hidden Valley
Cave Spring