Cieza is a town and municipality in Spain, in the autonomous community of Murcia. It is the capital of the Vega Alta comarca, an old form of provincial subdivision). Its current population consisted of 34,889 inhabitants in the year 2018. The Segura River passes by the town. Its economy is based on agriculture, mainly in the cultivation of peaches and olives, but industry is also important, since 4,000 people work in that sector.