Perumal Eri is a major fresh water lake in the Cuddalore district of Tamil Nadu, India. Perumal Eri is located in Alappakkam Village belongs to Cuddalore district in Tamil Nadu.
It comes under Cuddalore taluk and Alappakkam village Panchayath. It is located on highway NH 45A, en route to Chidambaram. It is 19 km from Cuddalore and 29 km from Chidambaram town. Perumal lake is located near the village. The village consists of more than 1,000 acres (4.0 km2) of arable land and about 1000 homes.
The village also houses an ancient Lord Shiva temple. It has one middle school and one elementary school. The lake water finally connected to sangolikuppam river.