Ateca is a municipality located in the province of Zaragoza, Aragon, Spain. At the time of the 2015 census, the municipality had a population of 1…Ateca is a municipality located in the province of Zaragoza, Aragon, Spain. At the time of the 2015 census, the municipality had a population of 1,969. The River Jalón is joined by the River Piedra and the River Manubles at Ateca.