Alathur 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.
Alathur Lok Sabha constituency comprises the following seven legislative assembly segments:
Chelakkara, Wadakkancherry and Kunnamkulam segments were earlier in the erstwhile Ottapalam Lok Sabha constituency.