The Port of San Juan (Puerto de San Juan) is a seaport facility located in the metropolitan area of San Juan, Puerto Rico.The "Port of San Juan" is the general name used to call various passenger and cargo facilities located in lands around the San Juan Bay (Bahía de San Juan). The port is composed of a total of sixteen piers, of which eight are used for passenger ships and eight for cargo ships. The port's facilities, in addition to, Luis Muñoz Marín International Airport and the "Lancha de Cataño" services, are property of the Port Authority of Puerto Rico.

The Port of San Juan's cargo facilities are located on the southern portion of San Juan Bay. Of the approximately eight cargo terminals, five are located in the Puerto Nuevo district of San Juan and the other three are located in the neighboring municipality of Guaynabo. The cargo facilities allow for more than 500,000 square feet (46,000 m²) of space for loading and unloading cargo.The location of the port's cargo facilities give it immediate access to Puerto Rico's vast expressway system and several major local routes, this allows for the fast and efficient transportation of goods throughout the Metropolitan Area and the rest of the island.