Usilamgulam is a village in Sankarankoil tehsil in district of Tirunelveli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Usilamgulam was 451 which includes 229 males and 222 females. Usilamgulam covers 95.29 ha area. Pincode of Usilamgulam is 627953.