The Udamadura Grama Niladhari Division has a Sinhalese majority (100.0%) . In comparison, the Walapane Divisional Secretariat (which contains the Udamadura Grama Niladhari Division) has a Sinhalese majority (63.0%) and a significant Indian Tamil population (33.8%)[2]
The Udamadura Grama Niladhari Division has a Buddhist majority (100.0%) . In comparison, the Walapane Divisional Secretariat (which contains the Udamadura Grama Niladhari Division) has a Buddhist majority (62.7%) and a significant Hindu population (33.1%)[2]