Ramanathapuram Lok Sabha constituency (Tamil: இராமநாதபுரம் மக்களவைத் தொகுதி) is one of the 39 Lok Sabha (parliamentary) constituencies in Tamil Nadu, a state in southern India.

[1] The constituency is roughly coterminous with the eponymous district.

Ramanathapuram Lok Sabha constituency is composed of the following assembly segments:[2] Ramanathapuram Lok Sabha constituency was composed of the following assembly segments:[3]