Grandpass South Grama Niladhari Division is a Grama Niladhari Division of the Colombo Divisional Secretariat of Colombo District of Western Province, Sri Lanka.

Grandpass South is a surrounded by the New Bazaar, Maligawatta East, Nawagampura, Orugodawatta, Dematagoda, Khettarama, Bloemendhal and Grandpass North Grama Niladhari Divisions.

The Grandpass South Grama Niladhari Division has a Moor plurality (45.1%), a significant Sinhalese population (34.8%) and a significant Sri Lankan Tamil population (17.6%).

In comparison, the Colombo Divisional Secretariat (which contains the Grandpass South Grama Niladhari Division) has a Moor plurality (40.1%), a significant Sri Lankan Tamil population (31.1%) and a significant Sinhalese population (25.0%)[2] Ethnicity in Grandpass South[2] The Grandpass South Grama Niladhari Division has a Muslim plurality (45.1%), a significant Buddhist population (31.8%) and a significant Hindu population (14.7%).

In comparison, the Colombo Divisional Secretariat (which contains the Grandpass South Grama Niladhari Division) has a Muslim plurality (41.8%), a significant Hindu population (22.7%), a significant Buddhist population (19.0%) and a significant Roman Catholic population (13.1%)[2] Religion in Grandpass South[2]