The name "Collio" is taken from the Italian word colli which means hillsides and describes the terrain of the Collio Goriziano region. The Collio extends from the Judrio river in the west, where it borders the Colli Orientali del Friuli DOC, to the Slovenian border on the east. To the south, it is bordered by the Isonzo del Friuli DOC. Most of the region's vineyards are centered on the comune of Cormons. The soil of the region is composed of calcareous marl and flysch sandstone.
