Koggala is a small coastal town, situated at the edge of alagoon on the south coast of Sri Lanka, located in Galle District, Southern Province, Sri Lanka, governed by an Urban Council. Koggala is bounded on one side by a reef, and on the other by a large lake, Koggala Lake, into which the numerous tributaries of the Koggala Oya drain. It is approximately 139 kilometres (86 mi) south of Colombo and is situated at an elevation of 3 metres (9.8 ft) above the sea level.