Kolonnawa is a suburb in Colombo District, Sri Lanka. It’s situated towards the eastern part of Colombo, the capital city of Sri Lanka. This area is known for its industrial installations, including oil refineries, textile factories, and other manufacturing facilities. It’s also home to a diverse population and has both residential and commercial areas.

The area has seen development and urbanization over the years, with improved infrastructure and amenities. 

Overall, Kolonnawa serves as an important industrial and residential area within the Colombo District, contributing to the economic and social fabric of Sri Lanka