阿尔卡萨伦（西班牙语：Alcazarén），是西班牙卡斯蒂利亚-莱昂巴利亚多利德省的一个市镇。总面积48平方公里，总人口687人（2001年），人口密度14人/平方公里。

Alcazarén is a town and municipality in the Province of Valladolid, part of the autonomous community of Castile-Leon, Spain. with a population of 702 (as of January 1, 2004 census). Its name originates from the Arab "al-qasrayn" which means "the two castles". In the Tierra de Pinares region it is located 35 km South of the province's capital (41.3725° N, 4.6714° W). It occupies and area of 48 km² with a 33.51 km perimeter.