| Dematagoda | |
| Native Name: | දෙමටගොඩ தெமட்டகொடை |
| Settlement Type: | Suburb |
| Pushpin Map: | Sri Lanka Colombo Greater |
| Pushpin Map Caption: | Location in Greater Colombo |
| Subdivision Type: | Country |
| Subdivision Name: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Western Province |
| Subdivision Type3: | District |
| Subdivision Name3: | Colombo District |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Timezone: | Sri Lanka Standard Time Zone |
| Utc Offset: | +5:30 |
| Coordinates: | 6.93°N 79.8778°W |
| Postal Code Type: | Postal Code |
| Postal Code: | 00900[1] |
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.
The railway signal and telecommunication engineer's office is situated in Dematagoda.