'Rockbridge County, VA' definitions:

Rockbridge -- U.S. County in Virginia

From: Gazetteer 2000
Name :
Rockbridge -- U.S. County in Virginia
Population (2000) :
20808
Housing Units (2000) :
9550
Land area (2000) :
599.626756 sq. miles (1553.026103 sq. km)
Water area (2000) :
1.351333 sq. miles (3.499935 sq. km)
Total area (2000) :
600.978089 sq. miles (1556.526038 sq. km)
Located within :
Virginia (VA), FIPS 51
Location :
37.804403 N, 79.437667 W