Kolonnawa is a town situated on the eastern boundary of Colombo in Sri Lanka. It serves as a geographic transition point between several local administrative areas.
The town is defined by specific natural and political boundaries, including the Kelani River to the north. It is bordered by the Kotikawatta-Mulleriyawa Pradeshiya Sabha to the east, the Kotte Municipal Council to the south, and the Colombo Municipal Council to the west.