Dematagoda is a suburb of Colombo, Sri Lanka. It is represented by divisional code 9 (Colombo 09). It is surrounded by the suburbs of Borella, Maradana and Kolonnawa. The Baseline Road passes through Dematagoda. It is the only location in Sri Lanka to have two railway stations and the first to have a flyover.^{[citation needed]}

The railway signal and telecommunication engineer's office is situated in Dematagoda.