Campo de Borja is a Spanish Denominación de Origen (DO) for wines located in the Campor de Borja comarca, northwest of the province of Zaragoza (Aragón, Spain). It is a transition zone between the plains of the River Ebro and the mountains of the Sistema Ibérico. The DO comprises 16 municipalities. These are Ainzón, Agón, Albeta, Ambel, Bisimbre, Borja, Bulbuente, Bureta, Fréscano, Fuendejalón, Magallón, Maleján, Mallén, Pozuelo de Aragón, Tabuenca and Vera de Moncayo. The Moncayo mountain is the dominant feature of the DO and creates a microclimate which gives the wines a special character.