Havana Harbor is the port of Havana, the capital of Cuba, and it is the main port in Cuba (not including Guantanamo Bay Naval Base, a territory on lease by the United States). Most vessels coming to the island make port in Havana. Other port cities in Cuba include Cienfuegos, Matanzas, Manzanillo and Santiago de Cuba.

The harbour was created from the natural Havana Bay which is entered through a narrow inlet and which divides into three main harbors: Marimelena, Guanabacoa, and Atarés.