The Wathumulla Grama Niladhari Division has a Sinhalese majority (70.6%), a significant Moor population (12.8%) and a significant Sri Lankan Tamil population (12.1%) . In comparison, the Ratmalana Divisional Secretariat (which contains the Wathumulla Grama Niladhari Division) has a Sinhalese majority (78.9%) [2]
The Wathumulla Grama Niladhari Division has a Buddhist majority (61.2%) and a significant Muslim population (15.2%) . In comparison, the Ratmalana Divisional Secretariat (which contains the Wathumulla Grama Niladhari Division) has a Buddhist majority (70.0%) and a significant Muslim population (11.3%) [2]