Alathur Lok Sabha constituency (Malayalam: ആലത്തൂർ ലോക്സഭാ മണ്ഡലം) is one of the 20 Lok Sabha (parliamentary) constituencies in Kerala state in southern India.This constituency came into existence in 2008, following the implementation of delimitation of parliamentary constituencies based on the recommendations of the Delimitation Commission of India constituted in 2002.