There are 7 US Post Offices in Henry County serving a total of 40,039 residents equating to 5,720 residents per post office. It's estimated that approximately 63,907 packages are handled across the 7 county post offices annually. Henry County is a county located in the U.S. state of Virginia. As of the 2010 census, the population was 54,151. The county seat is usually identified as Martinsville; however, the administration building (where county offices are located and where the board of supervisors holds meetings) and county courthouse are located in Collinsville. Henry County is part of the Martinsville, VA Micropolitan Statistical Area.