Alcázar de San Juan is a city and municipality of Spain located in the province of Ciudad Real, autonomous community of Castilla–La Mancha.

From the 13th to the 19th century the history of Alcázar is strongly linked to the Grand Priory of the Order of St. John of Jerusalem.

[2] The area is drained by two tributaries of the Guadiana: the Cigüela and the Záncara,[2] located to the west and south of the urban centre, respectively.

[7] By the early 16th century, Alcázar thrived as town of the Priory of St. John (extending across territory in the current-day provinces of Toledo and Ciudad Real), parallel to the relative decline of its capital of Consuegra.

Since 2015,[14] the city has struggled for years to move forward with the project for the construction of the Plataforma Logística Intermodal "Mancha Centro",[15] a dry port.