Greenbush, VirginiaGreenbush is a census-designated place in Accomack County, Virginia, United States. Per the 2020 census, the population was 224.Hills Farm was added to the National Register of Historic Places in 2008.GeographyThe CDP lies at an elevation of 43 feet.DemographicsGreenbush was first listed as a census designated place in the 2010 U.S. census.