Alcalá de Guadaira, city, Sevilla provincia (province), in the Andalusia comunidad autónoma (autonomous community), southwestern Spain. It is just southeast of Sevilla city, on the Guadaira River. The town is popularly known as Alcalá de los Panaderos (Alcalá of the Bakers) because of its large number of bakeries and flour mills, which supply Sevilla with most of its flour. Olives are also exported, and oil is pressed and refined in the town. Tourism, based on the healthful climate of the area, is of economic importance, as are chemical processing and furniture making. The nearby remains of a Moorish castle, captured by Christian forces in 1246, were declared a national monument in 1924. Pop. (2007 est.) mun., 66,089.