what county is grottoes virginia in
Rockingham County, Virginia Rockingham County is a county located in the U.S. state of Virginia. As of the 2010 census, the population was 76,314. Its county seat is the independent city of Harrisonburg. Along with Harrisonburg, Rockingham County forms the Harrisonburg, VA, Metropolitan Statistical Area. It is also home of the Rockingham County Baseball League.