Green Valley is a neighborhood in the southern part of Arlington County, Virginia. It is bordered by Four Mile Run and Shirlington to the south, Douglas Park to the west, I-395 to the east, and Columbia Heights and the Army-Navy Country Club to the north. The southeastern corner of the neighborhood borders the City of Alexandria. For a time, the neighborhood was also known as "Nauck," after former Confederate Army soldier, John D. Nauck, who purchased and subdivided 46 acres of land in the early 1870s. In 2019, the Nauck Civic Association voted to change its name to the Green Valley Civic Association in recognition of this history and requested a formal neighborhood name change from the county board back to Green Valley which was approved.