Alagankulam is a village situated on the east coast in the Ramanathapuram taluk and district in India.

The village is situated on the banks of the Vaigai River and is about 3 kilometres (1.9 mi) away from the seashore.

The legend on them shows that the Roman Emperor Valentine II who ruled around 375 CE issued the coins.

Undersea exploration work was also conducted at Poompuhar in 1996–1997 in collaboration with National Institute of Oceanography, Goa.

The village is located in southeast Tamil Nadu and connected by NH-49 to Madurai and Ramanathapuram from Rameswaram.

This article related to a location in Ramanathapuram district, Tamil Nadu, India is a stub.