Aranjuez (ane. Ara Jovis), a town of Spain, in the province and 30 m. by railway S. of the city of Madrid, on the left bank of the Tagus; pop. 3,800. It is the site of a royal palace of great beauty founded by Philip II., a favorite retreat of the monarchs of Spain during the spring, and is well supplied with gardens, cafes, hotels, and various places of fashionable amusement. The presence of the court swells the population to about 20,000. In summer the place is not healthy.