Sádaba is a municipality in the province of Zaragoza, in the autonomous community of Aragon, Spain. It is located in the comarca of Cinco Villas, in the northwestern part of the province near the border with Navarre.
The town is best known for the Castle of Sádaba, a 13th-century fortress that is one of the most notable examples of medieval military architecture in Aragon. The castle stands on a hill overlooking the town and features a distinctive seven-sided tower and a large courtyard.
Sádaba is also home to the Church of Santa María, a 16th-century church built in a Gothic-Renaissance style, and the remains of a Roman mausoleum. The surrounding area is primarily agricultural, with cereal crops and vineyards forming the basis of the local economy.