The Port of Miami, styled as PortMiami and formally known as the Dante B. Fascell Port of Miami, is a major seaport located in Biscayne Bay at the mouth of the Miami River in Miami, Florida. It is the largest passenger port in the world and one of the largest cargo ports in the United States. The port is located on Dodge, Lummus and Sam's Islands, which is the combination of three historic islands that have since been combined into one.