Ulagalappadi is a village in Sankarapuram tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Ulagalappadi was 3,647 which includes 1,802 males and 1,845 females. Ulagalappadi covers 476.29 ha area. Pincode of Ulagalappadi is 605702.