Erwadi is a village in Ramanathapuram District, Tamil Nadu. It belongs to Kilakarai Taluk and town panchayat. The village is the location of the grave and shrine of Qutb-us-Sultan Syed Ibrahim Badshah Shaheed, a ruler of Medina.[when?] Erwadi also belongs to Kadaladi assembly constituency, which is a part of Ramanathapuram (Lok Sabha constituency). After the delimitations in 2009, Erwadi was joined to the Ramanathapuram assembly constituency. Erwadi is the second largest contributor for the revenue of Ramanthapuram District.

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