Regunathapuram is a small village in Karambakkudi taluk, Pudukkottai District in the Indian state of Tamil Nadu.

Thattamanaippatti, Keerathur, Kalleripatti, Pudhuviduthi, Vandanviduthi are some of the closest villages to Regunathapuram.

The annual feast at Adaikala Matha Church falls on the first Saturday of May every year.

The people of Regunathapuram celebrate major festivals such as Pongal, Diwali, Christmas and Ramzan.

[4] Regunathapuram's economy is based on agriculture, using irrigation from bore wells and reservoirs.