Cacongo is a municipality in Cabinda Province, an exclave of Angola. Its principal town is Cacongo. Landana lies on the coast of the Atlantic …Cacongo is a municipality in Cabinda Province, an exclave of Angola. Its principal town is Cacongo. Landana lies on the coast of the Atlantic Ocean, adjacent to Landana Bay. The municipality covers 1,679 square kilometres and had a population of 39,076 at the 2014 Census; the latest official estimate is 44,974.