High Quality Content by WIKIPEDIA articles! The Port of Houston is a port in Houston—the fourth-largest city in the United States. The Port is a 25-mile-long complex of diversified public and private facilities located a few hours` sailing time from the Gulf of Mexico. It is the busiest port in the United States in terms of foreign tonnage, second-busiest in the United States in terms of overall tonnage, and thirteenth-busiest in the world. Though originally the port`s terminals were primarily within the Houston city limits, the port has expanded to such a degree that today it has facilities in multiple communities in the surrounding area. In particular the port`s busiest terminal, the Barbours Cut Terminal, is located in Morgan`s Point.